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Journal articles on the topic 'Pt electrocatalyst'

Author: Grafiati
Published: 9 March 2023
Last updated: 31 July 2025

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1

Kryukov, Yu I., V. I. Lukovtsev, Elena Mikhailovna Petrenko, and I. S. Khozyainova. "Electrochemical activity of the cathodes with platinum or platinum-palladium electrocatalysts for alkaline water electrolysis." Electrochemical Energetics 12, no. 1 (2012): 36–38. http://dx.doi.org/10.18500/1608-4039-2012-12-1-36-38.

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Electrochemical activity of cathodes with Pt or Pt-Pd-electrocatalysts was studied by voltammetry method under galvanostatic conditions. The dependence of the overvoltage of hydrogen evolution reaction on the logarithm of current density and on the test time of the cathode with Pt-Pd-electrocatalysts are defined. It is shown that the electrochemical activity of cathode with Pt-Pd-electrocatalyst is two times higher than with Pt-electrocatalyst at the hydrogen evolution reaction in 30% KOH solution at 90°C. As the temperature increases from 15 to 90° C the current density at 40 mV overvoltage a
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2

Cheng, Fengshun, Yuchen Guo, Xinhong Liang, et al. "Ionic Liquid Modification of High-Pt-Loading Pt/C Electrocatalysts for Proton Exchange Membrane Fuel Cell Application." Catalysts 14, no. 6 (2024): 344. http://dx.doi.org/10.3390/catal14060344.

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Ionic liquid modification for carbon-supported platinum (Pt/C) electrocatalysts to enhance their oxygen reduction reaction (ORR) activity has been well recognized. However, the research has only been reported on the low-Pt-loading Pt/C electrocatalysts, e.g., 20 wt%, while in practical applications, usually high-Pt-loading Pt/C electrocatalysts of 45–60 wt% are used. In this work, ionic liquid modification is systematically investigated for a Pt/C electrocatalyst with 60 wt% Pt loading for its ORR activity in the cathode in proton exchange membrane fuel cells (PEMFCs). Various adsorption amoun
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3

Miyamoto, Ryo, Taichi Ogawa, Ryosuke Nishiizumi, et al. "Pt-Ta-Co Electrocatalysts for Polymer Electrolyte Fuel Cells." ECS Meeting Abstracts MA2023-02, no. 40 (2023): 1958. http://dx.doi.org/10.1149/ma2023-02401958mtgabs.

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Introduction Electrocatalysts with both high catalytic activity and high potential cycling durability are required for polymer electrolyte fuel cells. It is of technological interest to develop electrocatalysts using mesoporous carbon as a support framework and Pt-Ta-Co as a catalyst. Fuel cells using this novel electrocatalyst have to be prepared to evaluate their electrochemical performance. Here in this study, we aim to examine polymer electrolyte fuel cells using these new electrocatalysts by evaluating the current-voltage characteristics and various overvoltages under different electrocat
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4

Miyamoto, Ryo, Kojiro Sanami, Takashi Suzuki, et al. "Electrochemical Characteristics of Polymer Electrolyte Fuel Cells Using Pt-Ta-Co Electrocatalysts." ECS Transactions 114, no. 5 (2024): 263–74. http://dx.doi.org/10.1149/11405.0263ecst.

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Polymer electrolyte fuel cells for heavy-duty applications need highly active and durable electrocatalysts. For this purpose, electrocatalysts based on Pt-Ta-Co materials are here developed. This study evaluates the cell performance, the various overvoltages, start-stop and load cycling durability, and electrocatalyst layer microstructure under different fabrication conditions. Guidelines for higher power, higher performance, and higher durability of polymer electrolyte fuel cells are proposed. Using Pt7Ta2Co1/KB electrocatalysts, the initial catalytic activity, start-stop cycle durability, an
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5

Miyamoto, Ryo, Kojiro Sanami, Takashi Suzuki, et al. "Electrochemical Characteristics of Polymer Electrolyte Fuel Cells Using Pt-Ta-Co Electrocatalysts." ECS Transactions 114, no. 5 (2024): 277–88. http://dx.doi.org/10.1149/11405.0277ecst.

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Polymer electrolyte fuel cells for heavy-duty applications need highly active and durable electrocatalysts. For this purpose, electrocatalysts based on Pt-Ta-Co materials are here developed. This study evaluates the cell performance, the various overvoltages, start-stop and load cycling durability, and electrocatalyst layer microstructure under different fabrication conditions. Guidelines for higher power, higher performance, and higher durability of polymer electrolyte fuel cells are proposed. Using Pt7Ta2Co1/KB electrocatalysts, the initial catalytic activity, start-stop cycle durability, an
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6

Miyamoto, Ryo, Taichi Ogawa, Ryosuke Nishiizumi, et al. "Pt-Ta-Co Electrocatalysts for Polymer Electrolyte Fuel Cells." ECS Transactions 112, no. 4 (2023): 353–60. http://dx.doi.org/10.1149/11204.0353ecst.

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Polymer electrolyte fuel cells for heavy-duty applications require highly active and durable electrocatalysts. Our research group has developed electrocatalysts with Pt-Ta-Co-based alloy. This study evaluates the cell performance with the Pt-Ta-Co-based alloy catalysts by varying the fabrication conditions of the electrocatalyst layers, such as the ionomer and solid ratio of the electrocatalyst paste. In addition, the effect of the carbon catalyst support on the cell performance is evaluated using mesoporous carbon and typical Ketjen black carbon supports. The cells using these new catalysts e
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7

Sharma, Shuchi, and Ranga Rao Gangavarapu. "(Digital Presentation) Synthesis and Promoting Activity of Gd2O3 for Methanol Electro-Oxidation on Pt/C." ECS Meeting Abstracts MA2022-02, no. 50 (2022): 2426. http://dx.doi.org/10.1149/ma2022-02502426mtgabs.

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One of the challenges in electrocatalysis is to design either an efficient non-noble electrocatalyst or improve the electrocatalytic activity of Pt/C by incorporating promoters such as metal oxides, carbides and nitrides. Rare earth metal oxides such as CeO2 have been explored to promote methanol electro-oxidation on Pt/C electrocatalyst. It has been noted that the synthesis method has profound effect on the physiochemical and in turn electrochemical properties of metal oxide promoted Pt/C electrocatalysts. This concept is tested on Gd2O3 promoted Pt/C. Gd2O3 is prepared by precipitation (GdO-
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8

Pan, Hong Cheng, Jiang Tao Liu, Jin Ming Liang, et al. "Preparation of Pt Colloids via a Wet-Chemical Method for Methanol Sensor." Advanced Materials Research 295-297 (July 2011): 527–30. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.527.

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Pt colloids were synthesized by a wet-chemical method. The Pt colloids were modified on the glassy carbon electrode (GCE). The electrochemical behavior and electrocatalyst for methanol of the colloidal Pt-modified electrode in H2SO4medium were investigated. The results show that the as-prepared Pt colloids are good electrocatalysts for methanol oxidation and the oxidation current increases with methanol concentration in the range of 0.002 to 0.5 M. The colloidal Pt-modified electrode is simple, easy-to-use and reusable, showing promising applications in the electrocatalyst and determination of
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9

Lim, Seongje, and Jong Hyeok Park. "MOF-Derived High Entropy Alloy Electrocatalyst with Low Amount of Noble Metal for Alkaline HER." ECS Meeting Abstracts MA2024-02, no. 56 (2024): 3782. https://doi.org/10.1149/ma2024-02563782mtgabs.

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Although numerous researches for electrochemical hydrogen generation reactions have been conducted, they have the limitation of requiring the use of large amounts of several noble metal elements such as Pt, Ru, and Ir for hydrogen evolution electrocatalysts. In addition, there are increasing researches of high-entropy alloy electrocatalysts, which has many advantages for electrocatalysis like high stability, tunability of element composition and ratio, various active sites, etc., while their synthesis methods usually require harsh consition. In this research, we introduce CoNiCuMnRu/C high ent
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10

Sanami, Kojiro, Kakeru Kubo, Ryo Miyamoto, et al. "A Tantalum-Rich Pt-Ta-Co Electrocatalyst for Polymer Electrolyte Fuel Cells." ECS Transactions 114, no. 5 (2024): 85–92. http://dx.doi.org/10.1149/11405.0085ecst.

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In polymer electrolyte fuel cells (PEFCs), Pt catalyst particle growth due to load fluctuation potential cycling, and oxidative corrosion of the carbon support due to start-stop potential cycling are important issues for cathode electrocatalysts affecting their durability. Here, we incorporate tantalum into the electrocatalyst to improve both the catalytic activity and durability. This is achieved via self-assembly of a nanocomposite electrocatalyst via dealloying to form Pt-Co alloy and TaOx support nanoparticles. Half-cell electrochemical measurements confirm that the catalytic activity and
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11

Ai, Tianyu, Yi Zhang, Jinlin Lu, and Yansheng Yin. "Self-assembled platinum-tungsten carbide (Pt-WC)/multi-walled carbon nanotubes (MWCNTs) electrocatalysts for ethanol electro-oxidation in acid medium." Materials Express 12, no. 1 (2022): 90–97. http://dx.doi.org/10.1166/mex.2022.2092.

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The design of a high-performance, durable and low-cost catalyst for direct ethanol fuel cells (DEFCs) applications is an eternal pursuit for researchers in the materials field. In this work, a kind of novel platinum-tungsten carbide (Pt-WC)/multi-walled carbon nanotubes (MWCNTs) electrocatalyst with different WC loadingsis prepared by self-assembly technology for ethanol oxidation reaction (EOR). The electrochemical performance and stability of Pt-WC/MWCNTs electrocatalysts toward EOR are investigated by cyclic voltammetry and chronoamperometry. The mass activity of Pt-WC0.15/MWCNTs electrocat
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12

Wang, Quan, Baosen Mi, Jun Zhou, Ziwei Qin, Zhuo Chen, and Hongbin Wang. "Hollow-Structure Pt-Ni Nanoparticle Electrocatalysts for Oxygen Reduction Reaction." Molecules 27, no. 8 (2022): 2524. http://dx.doi.org/10.3390/molecules27082524.

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An electrocatalyst with high oxygen reduction reaction (ORR) activity and high stability during start–stop operation is necessary. In this paper, hollow-structure Pt-Ni electrocatalysts are investigated as ORR catalysts. After synthesis via sacrificial SiO2 template method, the electrocatalyst exhibits much higher specific activity (1.88 mA/cm2) than a commercial Pt/C catalyst. The mass activity (0.49 A/mg) is 7 times higher than the commercial Pt/C catalyst. The kinetics of the ORR is evaluated using Tafel and K-L plots. It also exhibits a higher durability than commercial Pt/C catalyst durin
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13

Li, Lulu, Fenyang Tian, Longyu Qiu, Fengyu Wu, Weiwei Yang, and Yongsheng Yu. "Recent Progress on Ruthenium-Based Electrocatalysts towards the Hydrogen Evolution Reaction." Catalysts 13, no. 12 (2023): 1497. http://dx.doi.org/10.3390/catal13121497.

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Hydrogen has emerged as an important candidate for clean energy, owing to its environmentally friendly advantages. Electrolytic hydrogen production stands out as the most promising technology for hydrogen production. Therefore, the design of highly efficient electrocatalysts is significant to drive the application of hydrogen technologies. Platinum (Pt)-based catalysts are famous for their outstanding performance in the hydrogen evolution reaction (HER). However, the expensive cost limits its wide application. Ruthenium (Ru)-based catalysts have received extensive attention due to their relati
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14

Gatalo, Matija, Primož Jovanovič, Francisco Ruiz-Zepeda, et al. "Insights into electrochemical dealloying of Cu out of Au-doped Pt-alloy nanoparticles at the sub-nano-scale." Journal of Electrochemical Science and Engineering 8, no. 1 (2018): 87–100. http://dx.doi.org/10.5599/jese.487.

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Pt alloy nanoparticles present the most probable candidate to be used as the cathode cathodic oxygen reduction reaction electrocatalyst for achieving commercialization targets of the low-temperature fuel cells. It is therefore very important to understand its activation and degradation processes. Besides the ones known from the pure Pt electrocatalysts, the dealloying phenomena possess a great threat since the leached less-noble metal can interact with the polymer membrane or even poison the electrocatalyst. In this study, we present a solution, supported by in-depth advance electrochemical ch
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15

Payattikul, Laksamee, Chen-Yu Chen, Yong-Song Chen, Mariyappan Raja Pugalenthi, and Konlayutt Punyawudho. "Recent Advances and Synergistic Effects of Non-Precious Carbon-Based Nanomaterials as ORR Electrocatalysts: A Review." Molecules 28, no. 23 (2023): 7751. http://dx.doi.org/10.3390/molecules28237751.

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The use of platinum-free (Pt) cathode electrocatalysts for oxygen reduction reactions (ORRs) has been significantly studied over the past decade, improving slow reaction mechanisms. For many significant energy conversion and storage technologies, including fuel cells and metal–air batteries, the ORR is a crucial process. These have motivated the development of highly active and long-lasting platinum-free electrocatalysts, which cost less than proton exchange membrane fuel cells (PEMFCs). Researchers have identified a novel, non-precious carbon-based electrocatalyst material as the most effecti
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16

Carbajal, F. Ginez, M. A. García, and S. A. Gamboa. "Study of Ethanol Electrooxidation Reaction at Room Temperature on Nanometric Pt-Ru, Pt-Sn and Pt-Ru-Sn in Direct Alcohol Fuel Cells." Journal of New Materials for Electrochemical Systems 21, no. 1 (2018): 043–49. http://dx.doi.org/10.14447/jnmes.v21i1.522.

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Ethanol electrooxidation in acid medium was investigated on Pt-Ru-Sn/C, Pt-Ru/C and Pt-Sn/C. The electrocatalysts were synthesized by microwave assisted chemical reduction reaction. The samples were characterized by transmission electron microscopy (TEM), X-ray diffraction analysis (XRD) and electrochemical analysis for the electrooxidation of ethanol. The ternary electrocatalyst was evaluated in an experimental Direct Ethanol Fuel Cell (DEFC). The method of synthesis used in this work allowed the formation of nanostructured electrocatalysts. The results obtained by electrochemical studies sho
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17

Labrador, Natalie Yumiko, and Daniel V. Esposito. "(Invited) Multifunctional Membrane Coated Electrocatalysts." ECS Meeting Abstracts MA2018-01, no. 31 (2018): 1875. http://dx.doi.org/10.1149/ma2018-01/31/1875.

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Electrocatalysts are essential components in many emerging electrochemical technologies due to their ability to efficiently facilitate the interconversion between electrical and chemical energy. However, significant improvements in the stability, activity, and selectivity of state-of-the-art electrocatalysts must be made if these technologies are going to play a major role in a sustainable energy future. The vast majority of electrocatalysts used in today’s commercial devices are comprised of metallic nanoparticles or thin films that are deposited onto a conductive support and partially expose
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18

Zou, Yiming, Ronn Goei, Su-Ann Ong, Amanda Jiamin ONG, Jingfeng Huang, and Alfred Iing Yoong TOK. "Development of Core-Shell Rh@Pt and Rh@Ir Nanoparticle Thin Film Using Atomic Layer Deposition for HER Electrocatalysis Applications." Processes 10, no. 5 (2022): 1008. http://dx.doi.org/10.3390/pr10051008.

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The efficiency of hydrogen gas generation via electrochemical water splitting has been mostly limited by the availability of electrocatalyst materials that require lower overpotentials during the redox reaction. Noble metals have been used extensively as electrocatalysts due to their high activity and low overpotentials. However, the use of single noble metal electrocatalyst is limited due to atomic aggregation caused by its inherent high surface energy, which results in poor structural stability, and, hence, poor electrocatalytic performance and long-term stability. In addition, using noble m
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19

Song, Xinyu, Jin Wang, Ying Xin, and Zhaoliang Zhang. "Facile synthesis of high-performance PtNi/C bimetallic alloy electrocatalyst for alkaline hydrogen evolution reaction." Journal of Physics: Conference Series 3046, no. 1 (2025): 012023. https://doi.org/10.1088/1742-6596/3046/1/012023.

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Abstract Alkaline water electrolysis technology is a critical route for promoting green hydrogen production, but the hydrogen evolution reaction (HER) poses significant cost challenges, primarily attributed to its inherently sluggish reaction kinetics, by relying on catalysts composed of noble metals. In this study, a carbon-supported PtNi bimetallic alloy electrocatalyst with a Pt: Ni (metal: transition metal) atomic ratio of 7:3 was successfully synthesized via a facile method. Characterizations reveal that the synthesized PtNi nanoparticles show a well-alloyed structure with modified Pt ele
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20

Sanami, Kojiro, Ryosuke Nishiizumi, Masahiro Yasutake, et al. "Ta2O5 Catalyst Support for Polymer Electrolyte Fuel Cells." ECS Transactions 112, no. 4 (2023): 369–79. http://dx.doi.org/10.1149/11204.0369ecst.

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The platinum electrocatalysts widely used in polymer electrolyte fuel cells (PEFCs) cause oxidative degradation of the carbon support especially under start-stop cycling conditions at the cathode. In addition, the potential fluctuations caused by load cycling promote Pt particle size growth, thereby decreasing their catalytic activity. In this work we investigate the use of tantalum oxide (Ta2O5) as a thermochemically stable electrocatalyst support under strongly-acidic and high voltage conditions, as a means to suppress carbon corrosion. Pt-Co alloy nanoparticles decorated on Ta2O5 in turn su
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21

Miyamoto, Ryo, Kojiro Sanami, Takashi Suzuki, et al. "Electrochemical Characteristics of Polymer Electrolyte Fuel Cells Using Pt-Ta-Co Electrocatalysts." ECS Meeting Abstracts MA2024-02, no. 44 (2024): 2995. https://doi.org/10.1149/ma2024-02442995mtgabs.

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Introduction Polymer electrolyte fuel cells need highly active and durable electrocatalysts. Our research group has developed Pt-Ta-Co-based electrocatalysts, achieving higher electrochemical performance (1,2). To evaluate and further improve cell performance using these new catalysts, this study aims to evaluate the current-voltage characteristics, various overvoltages, and potential cycle durability by varying preparation conditions of MEAs using the Pt-Ta-Co catalysts, and to clarify the materials design principles for higher power density, higher performance, and higher durability of polym
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22

Paunović, Perica, Orce Popovski, Dafinka Stoevska Gogovska, Elefteria Lefterova, Evelina Slavcheva, and Aleksandar T. Dimitrov. "Electrocatalytic activity of hypo–hyper-d-electrocatalysts (Me/TiO2/MWCNTs) based on Co-Ru in alkaline hydrogen electrolyser." Macedonian Journal of Chemistry and Chemical Engineering 30, no. 1 (2011): 55. http://dx.doi.org/10.20450/mjcce.2011.70.

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This study is concerned with preparation and characterization of Co-Ru based hypo-hyper d-electrocatalysts aimed for water electrolysis. The composition of the studied electrocatalysts was: 10 % mixed metallic phase (Co : Ru = 1 : 1 wt., Co:Ru = 4 : 1 wt. and Co : Ru : Pt = 4 : 0.5 : 0.5), 18 % TiO2 as a crystalline anatase deposited on activated multiwalled carbon nanotubes (MWCNTs). For comparison, corresponding electrocatalysts with pure hyper d-metallic phase (Co and Ru) were prepared. The structural characterization of the studied electrocatalysts was performed by means of XRD, SEM and FT
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Zhang, Xiangkun, Yun Li, Jingru Ren, and Yongmin Huang. "Synthesis of a Zn/Fe–N–C electrocatalyst towards efficient oxygen reduction reaction via a facile one-pot method." Materials Research Express 9, no. 2 (2022): 025604. http://dx.doi.org/10.1088/2053-1591/ac569e.

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Abstract The high price and unsatisfactory stability of Pt-based catalysts for the sluggish oxygen reduction reaction (ORR) severely limit the development of fuel cells and metal-air batteries. Therefore, developing Pt-free electrocatalysts with excellent activities and stabilities is significant. Herein, an efficient Zn/Fe–N–C electrocatalyst is synthesized via a facile one-pot method. Owing to its curved nanosheet structure, appropriate microporous and mesoporous specific surface areas, abundant defects and high Fe–Nx content, Zn/Fe–N–C exhibits remarkable ORR activity and stability in alkal
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Jiang, Minhua, Xiaofang Yu, Haoqi Yang, and Shuiliang Chen. "Optimization Strategies of Preparation of Biomass-Derived Carbon Electrocatalyst for Boosting Oxygen Reduction Reaction: A Minireview." Catalysts 10, no. 12 (2020): 1472. http://dx.doi.org/10.3390/catal10121472.

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Oxygen reduction reaction (ORR) has attracted considerable attention for clean energy conversion technologies to reduce traditional fossil fuel consumption and greenhouse gas emissions. Although platinum (Pt) metal is currently used as an electrocatalyst to accelerate sluggish ORR kinetics, the scarce resource and high cost still restrict its further scale-up applications. In this regard, biomass-derived carbon electrocatalysts have been widely adopted for ORR electrocatalysis in recent years owing to their tunable physical/chemical properties and cost-effective precursors. In this minireview,
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Baruah, Sarmistha, Akshai Kumar, and Nageswara Rao Peela. "(Digital Presentation) Ethanol Electro-Oxidation Kinetics Using Activated Carbon-Supported Pt-Ag Catalysts in Alkaline Media." ECS Meeting Abstracts MA2023-01, no. 40 (2023): 2879. http://dx.doi.org/10.1149/ma2023-01402879mtgabs.

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Due to scarcity of fossil fuels and their severe environmental consequences, the development of high efficiency energy conversion devices such as fuel cells (FCs) have gained considerable attention. The specific energy conversion efficiency of FC is highly influenced by the activity of the electrocatalysts. The Pt is widely used as an electrocatalyst due to its high activity and stability, but its high cost and depletion of resources hinder its commercialization. One of the workable strategies for the practical application of Pt is to reduce its content by alloying with some non-precious metal
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Shao, Minhua, and Fei Xiao. "(Invited) Durable Hybrid Electrocatalysts for Fuel Cells." ECS Meeting Abstracts MA2023-02, no. 57 (2023): 2753. http://dx.doi.org/10.1149/ma2023-02572753mtgabs.

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Proton exchange membrane fuel cell converts hydrogen and oxygen into electricity with zero emission. The high cost and low durability of Pt-based electrocatalysts for oxygen reduction reaction hinder its wide applications. The development of non-precious metal electrocatalysts also reaches the bottleneck because of the low activity and durability. Here we rationally design a hybrid electrocatalyst consisting of atomically dispersed Pt and Fe single atoms and Pt-Fe alloy nanoparticles. The Pt mass activity of the hybrid catalyst is 3.7 times higher than that of commercial Pt/C in a fuel cell. M
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Liu, Kai, Hongpu Huang, Yuxin Zhu, et al. "Edge-segregated ternary Pd–Pt–Ni spiral nanosheets as high-performance bifunctional oxygen redox electrocatalysts for rechargeable zinc–air batteries." Journal of Materials Chemistry A 10, no. 7 (2022): 3808–17. http://dx.doi.org/10.1039/d1ta10585j.

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Ultrathin Pd45Pt44Ni11 spiral nanosheets with abundant Pt/Ni-segregated edges exhibit excellent ORR and OER dual-electrocatalysis in alkaline, showcasing a workable air cathode electrocatalyst for high-efficiency and rechargeable Zn–air batteries.
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Suzuki, Takashi, Ryo Miyamoto, Masahiro Yasutake, et al. "Microstructural Design of PEFC Electrocatalyst Layer Using Mesoporous Carbon." ECS Transactions 114, no. 5 (2024): 301–7. http://dx.doi.org/10.1149/11405.0301ecst.

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Heavy-duty applications of polymer electrolyte fuel cells (PEFCs) require improved activity and durability of the cathode electrocatalysts. The nanostructure and microstructure of the catalyst layer both significantly affect PEFC performance. Mesoporous carbons (MC) have mesopores which have been shown to suppress ionomer poisoning, when used as a catalyst support, leading to higher catalytic activity. Here, we compare the initial performance of single cells using Ketjen black (KB) and MC catalyst supports. Furthermore, the fuel cell performance is evaluated using Pt-Ta-Co alloy-based catalyst
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Suzuki, Takashi, Ryo Miyamoto, Masahiro Yasutake, et al. "Microstructural Design of PEFC Electrocatalyst Layer Using Mesoporous Carbon." ECS Transactions 114, no. 5 (2024): 287–93. http://dx.doi.org/10.1149/11405.0287ecst.

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Heavy-duty applications of polymer electrolyte fuel cells (PEFCs) require improved activity and durability of the cathode electrocatalysts. The nanostructure and microstructure of the catalyst layer both significantly affect PEFC performance. Mesoporous carbons (MC) have mesopores which have been shown to suppress ionomer poisoning, when used as a catalyst support, leading to higher catalytic activity. Here, we compare the initial performance of single cells using Ketjen black (KB) and MC catalyst supports. Furthermore, the fuel cell performance is evaluated using Pt-Ta-Co alloy-based catalyst
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Ogawa, Taichi, Shogo Nakamura, Ryo Miyamoto, et al. "Power Generation Charactristics of Polymer Electrolyte Fuel Cells with Electrocatalysts Supported on SnO2 in High Current Density Range." ECS Transactions 112, no. 4 (2023): 215–23. http://dx.doi.org/10.1149/11204.0215ecst.

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The durability of cathode catalysts in polymer electrolyte fuel cells remains a significant technical issue. Start-stop cycles cause carbon support corrosion and Pt catalyst particle detachment from the support leading to a significant cell degradation. SnO2-supported electrocatalysts using carbon materials as the conducting framework have the potential to achieve both high activity and high durability. However, cell performance in the high current density range needs to be improved to apply them to heavy-duty vehicles. This study selected mesoporous carbon (MC) as the conductive framework bec
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Ogawa, Taichi, Shogo Nakamura, Ryo Miyamoto, et al. "Power Generation Charactristics of Polymer Electrolyte Fuel Cells with Electrocatalysts Supported on SnO2 in High Current Density Range." ECS Meeting Abstracts MA2023-02, no. 38 (2023): 1831. http://dx.doi.org/10.1149/ma2023-02381831mtgabs.

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Introduction Considerable efforts have been made for FCEV commercialization, for which sufficient performance and durability have to be achieved1. SnO2-supported electrocatalysts with carbon backbone have a potential to achieve both high catalytic activity and high cycling durability2-3. However, it is necessary to further optimize cell performance up to high current densities for such alternative electrocatalysts. By controlling the thickness of the seal material and optimizing the Nafion content of the electrocatalyst layer, successful reduction of various overvoltages and improved power gen
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Vashishth, Surishi, and Muthusamy Eswaramoorthy. "Investigation of Pd Based Metal-Carbon As Bifunctional Electrocatalyst for OER and ORR." ECS Meeting Abstracts MA2023-02, no. 58 (2023): 2838. http://dx.doi.org/10.1149/ma2023-02582838mtgabs.

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Developing oxygen reduction/ evolution reaction (ORR/OER) bifunctional electrocatalysts has great significance for promoting the sustainable energy conversion. Herein, Pd (5wt% only) based bimetallic catalyst adhered well on heteroatom doped conducting carbon substrate is designed and constructed. Rich defects, multiple active centers and strong synergistic effect with rapid ion/electron transport ability allow the electrocatalyst to exhibit superior performance (Li et al., 2019). Owing to its more active metal-Pd sites due to high surface area conducting carbon matrix an ultralow overpotentia
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Li, Qiao Xia, Hong Min Mao, Ming Shuang Liu, and Qun Jie Xu. "Electrooxidation of Methanol on Ru/Pt Film Bimetallic Electrode as Probed by In Situ ATR-SEIRAs Study." Advanced Materials Research 608-609 (December 2012): 945–49. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.945.

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A new approach of spontaneous deposition was carried out to prepare the Ru/Pt film electrocatalyst for direct methanol fuel cells. This deposition method just made Pt like a ‘skin’ covered Ru films, which reduced the load of Pt but obtained a higher activity. The Pt-modified Ru films electrode was studied with the cyclic voltammetries and in-situ ATR-SEITA spectra on methanol oxidation. Compare to bare Ru and Pt, the bands of the adsorbed CO and water observed in IR spectra can be assigned. The present results give a clue for designing new electrocatalysts for DMFCs.
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Alamgir, Faisal M., Abdulaziz Alabbady, Crystal N. Bell, and dong Chan Lee. "Substoichiometric Titania As Viable Supports for Direct Electrodeposition of Electrocatalysts for Fuel-Cell Relevant Reactions." ECS Meeting Abstracts MA2022-02, no. 22 (2022): 923. http://dx.doi.org/10.1149/ma2022-0222923mtgabs.

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One of the obstacles to long-term performance of fuel cells is the corrosion carbon support for the electrocatalysts. Titania (TiO2), with its robust corrosion resistance, is already used as a catalyst support for a range of reactions. However, with a bandgap of around 3 - 3.4 eV depending on the type of polymorph, it is too insulating to serve as an electrocatalyst support. In this study, we explored the electrical and the corrosion-resistance properties of substoichiometric titania, specifically the Ti2O3 and the Ti3O5 phases, in order to assess whether they may be as plausible carbon-free s
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35

Guzmán-Balderas, G., K. P. Padmasree, J. F. Méndez-Vázquez, Ivonne L. Alonso-Lemus, and Francisco Javier Rodriguez-Varela. "High Performance Low-Pt Content La1-XSrxFeO3-Pt/C Electrocatalysts for Overall Water Splitting." ECS Meeting Abstracts MA2025-01, no. 52 (2025): 2596. https://doi.org/10.1149/ma2025-01522596mtgabs.

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In this research, the catalytic activity of a series of the La1-xSrxFeO3-Pt/C composite electrocatalysts (where x = 0, 0.1, 0.3 and 0.5 and C: Vulcan XC-72), having 10 wt. % Pt, for the HER and OER is evaluated in alkaline medium. The perovskites and composites have been synthesized employing the Pechini and microwave-assisted polyol methods, respectively, with a nominal La1-xSrxFeO3: Pt weight ratio of 1:1. For comparison purposes, a commercial type electrocatalyst having 20 wt. % of Pt (identified as Pt/C) has been synthesized. The XRD patterns show crystalline La1-xSrxFeO3 perovskites in th
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36

Zhang, J., M. B. Vukmirovic, K. Sasaki, F. Uribe, and R. R. Adzic. "Platinum monolayer electrocatalysts for oxygen reduction: Effect of substrates, and long-term stability." Journal of the Serbian Chemical Society 70, no. 3 (2005): 513–25. http://dx.doi.org/10.2298/jsc0503513z.

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We describe a novel concept for a Pt monolayer electrocatalyst and present the results of our electrochemical, X-ray absorption spectroscopy, and scanning tunneling microscopy studies. The electrocatalysts were prepared by a new method for depositing Pt monolayers involving the galvanic displacement by Pt of an under potentially deposited Cu monolayer on substrates of Au (111), Ir(111), Pd(111), Rh(111) and Ru(0001) single crylstals, and Pd nanoparticles. The kinetics of O2 reduction showed significant enhancement with Pt monolayers on Pd(111) and Pd nanoparticle surfaces in comparisonwith the
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37

Manivannan, Natarajan, Vijai Shankar Balachandran, and V. S. Vasantha. "Carbon Supported Platinum-Molybdenum Alloy Nanoparticles for Oxygen Reduction Reaction." Asian Journal of Chemistry 33, no. 5 (2021): 1153–58. http://dx.doi.org/10.14233/ajchem.2021.23165.

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Fuel cells are gaining importance in the emerging area of power generation. However, sluggishness of the cathodic oxygen reduction reaction (ORR) and usage of expensive electrocatalysts are hindering its widespread application. Hence, an effort has been made in the present study to synthesize efficient electrocatalysts based on Pt-Mo alloys with varying atomic ratios (0-100 at. %) by thermal decomposition method. The synthesized samples were characterized using XRD, SEM, TEM and XPS techniques. The electrocatalytic activity for ORR was measured using cyclic voltammetry and rotating disk electr
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38

Lafuente, Esperanza, Edgar Muñoz, Ana M. Benito, et al. "Single-walled carbon nanotube-supported platinum nanoparticles as fuel cell electrocatalysts." Journal of Materials Research 21, no. 11 (2006): 2841–46. http://dx.doi.org/10.1557/jmr.2006.0355.

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Single-walled carbon nanotubes (SWNTs) have been used as electrocatalyst support for fuel cells. A toluene solution of a platinum salt, bis(dibenzylideneacetone) platinum, has been used for the first time to decorate the outer surface of SWNT bundles with Pt nanoparticles. The obtained Pt/SWNT materials were then used as catalytic layer in electrodes for fuel cell electrocatalysis. The used platinum salt concentration in the initial SWNT dispersion determined the Pt nanoparticle size and, consequently, the activity of the Pt/SWNT electrodes toward the oxygen reduction reaction. The achieved re
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39

Hussain, Sajjad, Kamran Akbar, Dhanasekaran Vikraman, et al. "WS(1−x)Sex Nanoparticles Decorated Three-Dimensional Graphene on Nickel Foam: A Robust and Highly Efficient Electrocatalyst for the Hydrogen Evolution Reaction." Nanomaterials 8, no. 11 (2018): 929. http://dx.doi.org/10.3390/nano8110929.

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To find an effective alternative to scarce, high-cost noble platinum (Pt) electrocatalyst for hydrogen evolution reaction (HER), researchers are pursuing inexpensive and highly efficient materials as an electrocatalyst for large scale practical application. Layered transition metal dichalcogenides (TMDCs) are promising candidates for durable HER catalysts due to their cost-effective, highly active edges and Earth-abundant elements to replace Pt electrocatalysts. Herein, we design an active, stable earth-abundant TMDCs based catalyst, WS(1−x)Sex nanoparticles-decorated onto a 3D porous graphene
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40

Inoue, Yusuke, Masahiro Yasutake, Zhiyun Noda, et al. "Preparation of Nanocrystalline Nb-Doped SnO2 on Mesoporous Carbon for PEFC Electrocatalysts." ECS Meeting Abstracts MA2022-02, no. 42 (2022): 1584. http://dx.doi.org/10.1149/ma2022-02421584mtgabs.

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Pt-based catalysts on carbon support (Pt/C) is widely used as polymer electrolyte fuel cell (PEFC) electrocatalyst. However, under high potential at the cathode, Pt detachment and aggregation due to carbon corrosion can occur. Therefore, conventional Pt/C electrocatalysts have a difficulty in durability[1]. SnO2 is known to be stable at high potentials in a PEFC cathode environment. Our research group has developed an electrocatalyst that uses carbon as a support framework, with SnO2 supported on it and Pt catalyst particles on SnO2 (Pt/SnO2/Carbon), achieving high durability [2-4]. However, t
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41

Gunji, Takao, and Futoshi Matsumoto. "Electrocatalytic Activities towards the Electrochemical Oxidation of Formic Acid and Oxygen Reduction Reactions over Bimetallic, Trimetallic and Core–Shell-Structured Pd-Based Materials." Inorganics 7, no. 3 (2019): 36. http://dx.doi.org/10.3390/inorganics7030036.

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The structural design of nanosized electrocatalysts is extremely important for cathodic oxygen reduction reactions (ORR) and anodic oxidation reactions in small organic compounds in direct fuel cells. While Pt is still the most commonly used electrode material for ORR, the Pd electrocatalyst is a promising alternative to Pt, because it exhibits much higher electrocatalytic activity towards formic acid electrooxidation, and the electrocatalytic activity of ORR on the Pd electrode is the higher than that of all other precious metals, except for Pt. In addition, the mass activity of Pt in a core–
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42

Karuppiah, Chelladurai, Balamurugan Thirumalraj, Srinivasan Alagar, Shakkthivel Piraman, Ying-Jeng Jame Li, and Chun-Chen Yang. "Solid-State Ball-Milling of Co3O4 Nano/Microspheres and Carbon Black Endorsed LaMnO3 Perovskite Catalyst for Bifunctional Oxygen Electrocatalysis." Catalysts 11, no. 1 (2021): 76. http://dx.doi.org/10.3390/catal11010076.

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Developing a highly stable and non-precious, low-cost, bifunctional electrocatalyst is essential for energy storage and energy conversion devices due to the increasing demand from the consumers. Therefore, the fabrication of a bifunctional electrocatalyst is an emerging focus for the promotion and dissemination of energy storage/conversion devices. Spinel and perovskite transition metal oxides have been widely explored as efficient bifunctional electrocatalysts to replace the noble metals in fuel cell and metal-air batteries. In this work, we developed a bifunctional catalyst for oxygen reduct
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43

Karuppiah, Chelladurai, Balamurugan Thirumalraj, Srinivasan Alagar, Shakkthivel Piraman, Ying-Jeng Jame Li, and Chun-Chen Yang. "Solid-State Ball-Milling of Co3O4 Nano/Microspheres and Carbon Black Endorsed LaMnO3 Perovskite Catalyst for Bifunctional Oxygen Electrocatalysis." Catalysts 11, no. 1 (2021): 76. http://dx.doi.org/10.3390/catal11010076.

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Developing a highly stable and non-precious, low-cost, bifunctional electrocatalyst is essential for energy storage and energy conversion devices due to the increasing demand from the consumers. Therefore, the fabrication of a bifunctional electrocatalyst is an emerging focus for the promotion and dissemination of energy storage/conversion devices. Spinel and perovskite transition metal oxides have been widely explored as efficient bifunctional electrocatalysts to replace the noble metals in fuel cell and metal-air batteries. In this work, we developed a bifunctional catalyst for oxygen reduct
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44

Kim, Sang Kyum, Ji Yun Park, Soon Choel Hwang, et al. "Radiolytic Preparation of Electrocatalysts with Pt-Co and Pt-Sn Nanoparticles for a Proton Exchange Membrane Fuel Cell." Journal of Nanomaterials 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/960379.

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Nanosized Pt-Sn/VC and Pt-Co/VC electrocatalysts were prepared by a one-step radiation-induced reduction (30 kGy) process using distilled water as the solvent and Vulcan XC72 as the supporting material. While the Pt-Co/VC electrodes were compared with Pt/VC (40 wt%, HiSpec 4000), in terms of their electrocatalytic activity towards the oxidation of H2, the Pt-Co/VC electrodes were evaluated in terms of their activity towards the hydrogen oxidation reaction (HOR) and compared with Pt/VC (40 wt%, HiSpec 4000), Pt-Co/VC, and Pt-Sn/VC in a single cell. Additionally, the prepared electrocatalyst sam
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45

Koel, Bruce E. "(Invited) Synthesis and Characterization of New Catalyst Materials for Electrocatalysis." ECS Meeting Abstracts MA2023-01, no. 37 (2023): 2173. http://dx.doi.org/10.1149/ma2023-01372173mtgabs.

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In this talk I will discuss some of our recent explorations of new catalyst materials for electrocatalysis for renewable fuels and energy, including the synthesis and characterization of these materials. First, I will briefly describe our report of an efficient acid-stable N2-plasma treated hafnium oxyhydroxide electrocatalyst for hydrogen evolution and oxidation reactions (HER and HOR). Lack of a highly active, stable, earth-abundant electrocatalyst for carrying out HER and HOR in strongly acidic conditions is a major technical challenge for developing economical polymer electrolyte membrane
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46

Silva, Dionisio F., Adriana N. Geraldes, Eddy S. Pino, Almir Oliveira Neto, Marcelo Linardi, and Estevam V. Spinacé. "PtRu/C Electrocatalysts Prepared Using Gamma and Electron Beam Irradiation for Methanol Electrooxidation." Journal of Nanomaterials 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/928230.

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PtRu/C electrocatalysts (carbon-supported PtRu nanoparticles) were prepared in a single step submitting water/2-propanol mixtures containing Pt(IV) and Ru(III) ions and the carbon support to gamma and electron beam irradiation. The electrocatalysts were characterized by energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), transmission electron microscopy (TEM), and cyclic voltammetry and tested for methanol electrooxidation. PtRu/C electrocatalyst can be prepared in few minutes using high dose rate electron beam irradiation while using low dose rate gamma irradiation some hours wer
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47

Wang, Chengcheng, Ziheng Zheng, Zian Chen, et al. "Enhancement on PrBa0.5Sr0.5Co1.5Fe0.5O5 Electrocatalyst Performance in the Application of Zn-Air Battery." Catalysts 12, no. 7 (2022): 800. http://dx.doi.org/10.3390/catal12070800.

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Due to the insufficient stability and expensive price of commercial precious metal catalysts like Pt/C and IrO2, it is critical to study efficiently, stable oxygen reduction reaction as well as oxygen evolution reaction (ORR/OER) electrocatalysts of rechargeable Zn-air batteries. PrBa0.5Sr0.5Co1.5Fe0.5O5 (PBSCF) double perovskite was adopted due to its flexible electronic structure as well as higher electro catalytic activity. In this study, PBSCF was prepared by the citrate-EDTA method and the optimized amount of PBSCF-Pt/C composite was used as a potential ORR/OER bifunctional electrocatalys
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48

Jia, Jiaojiao, and Dongxu Tian. "Computational Design of Ni6@Pt1M31 Clusters for Multifunctional Electrocatalysts." Molecules 28, no. 22 (2023): 7563. http://dx.doi.org/10.3390/molecules28227563.

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High-efficiency and low-cost multifunctional electrocatalysts for hydrogen evolution reaction (HERs), oxygen evolution reaction (OERs) and oxygen reduction reaction (ORRs) are important for the practical applications of regenerative fuel cells. The activity trends of core–shell Ni6@M32 and Ni6@Pt1M31 (M = Pt, Pd, Cu, Ag, Au) were investigated using the density functional theory (DFT). Rate constant calculations indicated that Ni6@Pt1Ag31 was an efficient HER catalyst. The Volmer–Tafel process was the kinetically favorable reaction pathway for Ni6@Pt1M31. The Volmer–Heyrovsky reaction mechanism
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49

González, P. C. Meléndez, Sagrario M. Montemayor, D. Morales Acosta, Y. Verde-Gómez, B. Escobar, and F. J. Rodríguez Varela. "Enhanced Catalytic Activity for the Ethanol Oxidation Reaction (EOR) using Novel Pt-Fe3O4/MWCNT Bimetallic Electrocatalyst." Journal of New Materials for Electrochemical Systems 17, no. 2 (2014): 067–70. http://dx.doi.org/10.14447/jnmes.v17i2.425.

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In this work, 20% Pt-Fe3O4/MWCNT (Pt:Fe3O4 weight ratio of 80:20) and 20% Pt/MWCNT nanoparticles were synthesized and characterized as anode electrocatalysts in H2SO4 media. First, the electrocatalyst were submitted to accelerated catalyst degradation test (ACDT) by performing 500 cycles between 0.6 and 1.2 V (vs. SHE). Then, their performance for the EOR was evaluated. The magnetite-containing nanoparticles demonstrated to be highly electrochemically stable, with negligible surface area losses (less than 7%) in thehydrogen adsorption/desorption region. Moreover, Pt-Fe3O4/MWCNT showed a signif
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50

Mangoufis-Giasin, Iosif, Daniel Böhm, Zeljana Vajic, et al. "Alkaline Water-Assisted Polyol Synthesis of Pt/Vulcan PEMFC Cathode Electrocatalysts." ECS Meeting Abstracts MA2023-01, no. 38 (2023): 2213. http://dx.doi.org/10.1149/ma2023-01382213mtgabs.

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Sluggish oxygen reduction reaction (ORR) kinetics motivates great focus on PEMFC cathode electrocatalyst development.1 Electrocatalysts based on Pt are often prepared via the so-called polyol process, a solvothermal process that allows controlling of the structure, morphology, and chemical nature of various metal nanoparticles.2 Several parameters have been well-studied and thoroughly discussed in literature over the years, varying from surfactant removal or water addition to pH or NaOH/Pt molar ratio effect on Pt particle size. 3,4 Here, we present a slight modification of the well-establishe
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