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1

Jeon, Dasom, Jinwoo Park, Changhwan Shin, Hyunwoo Kim, Ji-Wook Jang, Dong Woog Lee, and Jungki Ryu. "Superaerophobic hydrogels for enhanced electrochemical and photoelectrochemical hydrogen production." Science Advances 6, no. 15 (April 2020): eaaz3944. http://dx.doi.org/10.1126/sciadv.aaz3944.

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The efficient removal of gas bubbles in (photo)electrochemical gas evolution reactions is an important but underexplored issue. Conventionally, researchers have attempted to impart bubble-repellent properties (so-called superaerophobicity) to electrodes by controlling their microstructures. However, conventional approaches have limitations, as they are material specific, difficult to scale up, possibly detrimental to the electrodes’ catalytic activity and stability, and incompatible with photoelectrochemical applications. To address these issues, we report a simple strategy for the realization of superaerophobic (photo)electrodes via the deposition of hydrogels on a desired electrode surface. For a proof-of-concept demonstration, we deposited a transparent hydrogel assembled from M13 virus onto (photo)electrodes for a hydrogen evolution reaction. The hydrogel overlayer facilitated the elimination of hydrogen bubbles and substantially improved the (photo)electrodes’ performances by maintaining high catalytic activity and minimizing the concentration overpotential. This study can contribute to the practical application of various types of (photo)electrochemical gas evolution reactions.
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2

Chen, Ziyao, Huai Qin Fu, Mengyang Dong, Yu Zou, Porun Liu, and Huijun Zhao. "Hydrogen Spillover in Electrochemical Hydrogen Evolution Reaction." General Chemistry 8, no. 3-4 (2022): 220007. http://dx.doi.org/10.21127/yaoyigc20220007.

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3

Eftekhari, Ali. "Electrocatalysts for hydrogen evolution reaction." International Journal of Hydrogen Energy 42, no. 16 (April 2017): 11053–77. http://dx.doi.org/10.1016/j.ijhydene.2017.02.125.

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4

Li, Hao, Zhien Zhang, and Zhijian Liu. "Non-Monotonic Trends of Hydrogen Adsorption on Single Atom Doped g-C3N4." Catalysts 9, no. 1 (January 14, 2019): 84. http://dx.doi.org/10.3390/catal9010084.

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To estimate the reaction free energies of the hydrogen evolution reaction (HER) on under-coordinated metallic sites, density function theory (DFT) calculations are usually employed to calculate the hydrogen adsorption energy with an “only-one-hydrogen-adsorption” model, assuming that adsorption with one hydrogen is the most thermodynamically favorable situation during catalysis. In this brief report, we show that on many single atom sites, adsorption of more than one hydrogen is sometimes even more thermodynamically favorable, with the presence of two or three hydrogens resulting in lower adsorption energies. These interesting non-monotonic trends indicate that modeling HER and other hydrogen-related reactions on under-coordinated sites should also consider the numbers of hydrogen being adsorbed at the same site, otherwise the results could deviate from real experimental situations.
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5

Lin, Shiru, Haoxiang Xu, Yekun Wang, Xiao Cheng Zeng, and Zhongfang Chen. "Directly predicting limiting potentials from easily obtainable physical properties of graphene-supported single-atom electrocatalysts by machine learning." Journal of Materials Chemistry A 8, no. 11 (2020): 5663–70. http://dx.doi.org/10.1039/c9ta13404b.

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The oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) are three critical reactions for energy-related applications, such as water electrolyzers and metal–air batteries.
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6

Wu, Hengbo, Jie Wang, Wei Jin, and Zexing Wu. "Recent development of two-dimensional metal–organic framework derived electrocatalysts for hydrogen and oxygen electrocatalysis." Nanoscale 12, no. 36 (2020): 18497–522. http://dx.doi.org/10.1039/d0nr04458j.

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Developing efficient and low-cost electrocatalysts with unique nanostructures is of great significance for improved electrocatalytic reactions, including the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR).
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7

Sui, Chenxi, Kai Chen, Liming Zhao, Li Zhou, and Qu-Quan Wang. "MoS2-modified porous gas diffusion layer with air–solid–liquid interface for efficient electrocatalytic water splitting." Nanoscale 10, no. 32 (2018): 15324–31. http://dx.doi.org/10.1039/c8nr04082f.

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The formation and adsorption of bubbles on electrodes weaken the efficiency of gas evolution reactions such as the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) by hindering proton transfer and consuming nucleation energy.
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8

Yu, Xiaomei, Wei Shi, Jiajiao Wei, Tiantian Liu, Yuanyuan Li, Mengyuan He, Zhengyu Wei, et al. "Green fabrication of ultrafine N-Mo x C/CoP hybrids for boosting electrocatalytic water reduction." Nanotechnology 35, no. 6 (November 22, 2023): 065704. http://dx.doi.org/10.1088/1361-6528/ad0985.

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Abstract Developing non-noble-metal electrocatalysts for hydrogen evolution reactions with high activity and stability is the key issue in green hydrogen generation based on electrolytic water splitting. It has been recognized that the stacking of large CoP particles limits the intrinsic activity of as-synthesized CoP catalyst for hydrogen evolution reaction. In the present study, N-Mo x C/CoP-0.5 with excellent electrocatalytic activity for hydrogen evolution reaction was prepared using N-Mo x C as decoration. A reasonable overpotential of 106 mV (at 10 mA cm−2) and a Tafel slope of 59 mV dec−1 in 1.0 M KOH solution was achieved with N-Mo x C/CoP-0.5 electrocatalyst, which exhibits superior activity even after working for 37 h. Uniformly distributed ultrafine nanoclusters of the N-Mo x C/CoP-0.5 hybrids could provide sufficient interfaces for enhanced charge transfer. The effective capacity of the hydrogen evolution reaction could be preserved in the complex, and the enlarged electrocatalytic surface area could be expected to offer more active sites for the reaction.
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9

Dong, Ying, Jing Li, and Xiao-Yu Yang. "Cu catalysts detour hydrogen evolution reaction." Matter 5, no. 8 (August 2022): 2537–40. http://dx.doi.org/10.1016/j.matt.2022.06.057.

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10

Stanković, S., B. N. Grgur, B. Jović, N. Krstajić, O. Pavlović, and M. Vojnović. "Hydrogen Evolution Reaction from EDTA Solutions." Materials Science Forum 413 (September 2002): 185–90. http://dx.doi.org/10.4028/www.scientific.net/msf.413.185.

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11

Shein, Anatoly B., and Vladimir I. Kichigin. "The kinetics of the hydrogen evolution reaction on CeM2Ge2 (M = Fe, Co, Ni) electrodes in alkaline solutions." Вестник Пермского университета. Серия «Химия» = Bulletin of Perm University. CHEMISTRY 12, no. 3 (2022): 170–85. http://dx.doi.org/10.17072/2223-1838-2022-3-170-185.

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The kinetics of hydrogen evolution reaction on the intermetallic compounds CeM2Ge2 (M = Fe, Co, Ni) in 0.5–2.0 M KOH solutions were studied using polarization measurements and electrochemical impedance spectroscopy. For 1 M KOH, the Tafel constants vary in the intervals: а = 0.46–0.57 V; b = 0.082–0.096 V. The catalytic activity in the hydrogen evolution reaction increases in the sequence CeFe2Ge2 – CeNi2Ge2 – CeCo2Ge2. The cathodic process was shown to be the combination of the hydrogen evolution reaction and hydrogen absorption reaction; the reaction of H2 evolution proceeds through the Volmer – Heyrovsky mechanism with the rate-determining Heyrovsky reaction; the Langmuir isotherm holds for the adsorption of atomic hydrogen.
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12

Xu, Yuelong, and Shasha Wang. "Preparation of porous carbon nanowires for hydrogen evolution reaction." Journal of Physics: Conference Series 2566, no. 1 (August 1, 2023): 012066. http://dx.doi.org/10.1088/1742-6596/2566/1/012066.

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Abstract Hydrogen for clean energy resources has attracted more and more attention, and water splitting for hydrogen production also has been widely studied. Electrocatalysis water splitting is considered the most efficient method for hydrogen production. In this work, we prepared a metal-free porous carbon nanowires catalyst with an electrostatic spinning method using granular poly styrol as the precursor and zinc chloride as the activating agent for forming a porous structure. The obtained catalysts exhibited a plentiful porous structure and an SSA value, which is beneficial for catalyzing hydrogen evolution reactions. The SSA is up to 329 m2 g−1, and the OP value at 10 mA·cm−2 is 386 mV. The materials presented good stability for hydrogen evolution reaction.
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13

Juodkazytė, Jurga, Kȩstutis Juodkazis, and Saulius Juodkazis. "Atoms vs. Ions: Intermediates in Reversible Electrochemical Hydrogen Evolution Reaction." Catalysts 11, no. 9 (September 21, 2021): 1135. http://dx.doi.org/10.3390/catal11091135.

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We present a critical analysis of the mechanism of reversible hydrogen evolution reaction based on thermodynamics of hydrogen processes considering atomic and ionic species as intermediates. Clear distinction between molecular hydrogen evolution/oxidation (H2ER and H2OR) and atomic hydrogen evolution/oxidation (HER and HOR) reactions is made. It is suggested that the main reaction describing reversible H2ER and H2OR in acidic and basic solutions is: H3O++2e−⇌(H2+)adH2+OH− and its standard potential is E0 = −0.413 V (vs. standard hydrogen electrode, SHE). We analyse experimentally reported data with models which provide a quantitative match (R.J.Kriek et al., Electrochem. Sci. Adv. e2100041 (2021)). Presented analysis implies that reversible H2 evolution is a two-electron transfer process which proceeds via the stage of adsorbed hydrogen molecular ion H2+ as intermediate, rather than Had as postulated in the Volmer-Heyrovsky-Tafel mechanism. We demonstrate that in theory, two slopes of potential vs. lg(current) plots are feasible in the discussed reversible region of H2 evolution: 2.3RT/F≈60 mV and 2.3RT/2F≈30 mV, which is corroborated by the results of electrocatalytic hydrogen evolution studies reported in the literature. Upon transition to irreversible H2ER, slowdown of H2+ formation in the first electron transfer stage manifests, and the slope increases to 2.3RT/0.5F≈120 mV; R,F,T are the universal gas, Faraday constants and absolute temperature, respectively.
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14

CASTILLO, VIRGIL CHRISTIAN, and JULIET Q. DALAGAN. "Graphene/TiO2 hydrogel: a potential catalyst to hydrogen evolution reaction." Bulletin of Materials Science 39, no. 6 (September 20, 2016): 1461–66. http://dx.doi.org/10.1007/s12034-016-1293-9.

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15

Zhang, Rui. "Research Progress on Electrocatalytic Materials for Water Electrolysis." Frontiers in Sustainable Development 5, no. 2 (February 23, 2025): 65–69. https://doi.org/10.54691/d9n32e40.

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Firstly, the application prospect of electrolytic water reaction is introduced, and then the relevant mechanisms of hydrogen evolution reaction and oxygen evolution reaction of electrolytic water are described. The research status of catalysts for hydrogen and oxygen evolution from electrolyzed water, mainly acid oxygen evolution catalyst and basic hydrogen evolution catalyst, was introduced. Finally, a summary and prospect of the water electrolysis catalyst are given.
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16

Lin, Shusen, Md Ahasan Habib, Mehedi Hasan Joni, Sumiya Akter Dristy, Rutuja Mandavkar, Jae-Hun Jeong, Young-Uk Chung, and Jihoon Lee. "CoFeBP Micro Flowers (MFs) for Highly Efficient Hydrogen Evolution Reaction and Oxygen Evolution Reaction Electrocatalysts." Nanomaterials 14, no. 8 (April 17, 2024): 698. http://dx.doi.org/10.3390/nano14080698.

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Hydrogen is one of the most promising green energy alternatives due to its high gravimetric energy density, zero-carbon emissions, and other advantages. In this work, a CoFeBP micro-flower (MF) electrocatalyst is fabricated as an advanced water-splitting electrocatalyst by a hydrothermal approach for hydrogen production with the highly efficient hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The fabrication process of the CoFeBP MF electrocatalyst is systematically optimized by thorough investigations on various hydrothermal synthesis and post-annealing parameters. The best optimized CoFeBP MF electrode demonstrates HER/OER overpotentials of 20 mV and 219 mV at 20 mA/cm2. The CoFeBP MFs also exhibit a low 2-electrode (2-E) cell voltage of 1.60 V at 50 mA/cm2, which is comparable to the benchmark electrodes of Pt/C and RuO2. The CoFeBP MFs demonstrate excellent 2-E stability of over 100 h operation under harsh industrial operational conditions at 60 °C in 6 M KOH at a high current density of 1000 mA/cm2. The flower-like morphology can offer a largely increased electrochemical active surface area (ECSA), and systematic post-annealing can lead to improved crystallinity in CoFeBP MFs.
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17

Paudel, Dasu Ram, Gopi Chandra Kaphle, Bhoj Raj Poudel, Mukunda KC, Manjinder Singh, and Gunendra Prasad Ojha. "Enhanced Hydrogen Evolution Reaction of a Zn+2-Stabilized Tungstate Electrocatalyst." Electrochem 6, no. 1 (January 24, 2025): 3. https://doi.org/10.3390/electrochem6010003.

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Due to their diverse properties and functionalities, cost-effective transition metal-based nanomaterials have been rigorously studied for electrochemical applications. Ultrathin nanosheets have been identified as the most effective electrodes for catalyzing water-splitting reactions in both acidic and alkaline environments. Here, we reported ZnWO4, a member of the tungstate family, as an effective electrocatalyst for promoting the electrochemical hydrogen evolution reaction. The Zn+2-stabilized tungstate showed a remarkable cathodic reaction during the water-splitting reaction with low overpotential (136 mV at 10 mA cm−2) and small HER kinetics (Tafel Slope = 75.3 mV dec−1) and long-term cyclic durability. The high-valence tungsten stabilized with divalent Zn+2 promotes electron transfer during the reaction, making it an advanced electrocatalyst for green hydrogen production.
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18

Bagbudar, Zeynep, and Robert Warburton. "Theoretical Studies of Hydrogen Evolution Involving Imidazolium Proton Donors." ECS Meeting Abstracts MA2024-02, no. 61 (November 22, 2024): 4085. https://doi.org/10.1149/ma2024-02614085mtgabs.

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The hydrogen evolution reaction (HER) is an important electrocatalytic reaction used for the electrochemical production of hydrogen gas. Its reverse reaction, the hydrogen oxidation reaction, is used to produce protons used in electrocatalytic reduction reactions for various electrochemical energy conversion and storage applications. While many fundamental studies have analyzed interfacial reactivity in aqueous HER, analogous mechanistic understanding of HER reactivity in nonaqueous media remains limited. In this presentation, periodic density functional theory (DFT) calculations are applied to mechanistic studies of HER on Pt(111) using various imidazolium proton donors. These studies incorporate analyses of imidazole adsorption and potential-dependent activation energies. The conjugate bases of imidazole adsorb strongly to the electrode surface. Yet, the adsorption geometries and energetics are sensitive to substituent effects and isomeric configurations at the interface. The potential-dependent binding geometries and adsorption energies of different imidazoles adsorbed to Pt(111) are analyzed in a dielectric continuum implicit solvent. These calculations demonstrate how imidazole derivatization and electrode surface charge impact the adsorption of imidazole conjugate bases during HER. To gain insights into the kinetics of the elementary Volmer and Heyrovsky steps of HER, potential-dependent reaction energies and activation barriers were calculated using the charge extrapolation method. Energetics were calculated for different electrode potentials by modifying the coverage of protons. This approach was used to develop relationships between reaction thermodynamics and kinetics via Brønsted–Evans–Polanyi relationships for various imidazoles, where this relationship gives charge transfer coefficients in the Butler–Volmer equation. The goal of assessing these reaction parameters is to enhance understanding of charge transfer processes and molecular interactions at the electrode-electrolyte interface, which is essential for the design of high-efficiency energy conversion and storage devices. The potential-dependent adsorption behavior and kinetics of elementary proton-coupled electron transfer steps are used to understand the reaction kinetics of hydrogen evolution in a nonaqueous imidazole-based electrolyte through comparisons to voltammetry measurements. Through these analyses, we identify kinetic trends across functionalized imidazoles, providing valuable perspectives for the development of catalytic systems and energy storage technologies.
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19

Yu, Haoxuan, Mengyang Zhang, Yuntao Cai, Yanling Zhuang, and Longlu Wang. "The Advanced Progress of MoS2 and WS2 for Multi-Catalytic Hydrogen Evolution Reaction Systems." Catalysts 13, no. 8 (July 25, 2023): 1148. http://dx.doi.org/10.3390/catal13081148.

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Two-dimensional transition-metal dichalcogenides (TMDs) are considered as the next generation of hydrogen evolution electrocatalysts due to their adjustable band gap, near-zero Gibbs free energy, and lower cost compared to noble metal catalysts. However, the electrochemical catalytic hydrogen evolution performance of TMDs with two-dimensional properties is limited by innate sparse catalytic active sites, poor electrical conductivity, and weak electrical contact with the substrate. It remains challenging for the intrinsic activity of TMDs for electrocatalytic and photocatalytic hydrogen evolution reactions (HERs) to compete with the noble metal platinum. In recent years, significant development of transition metal chalcogenides, especially MoS2 and WS2, as catalysts for electrocatalytic and photocatalytic HERs has proceeded drastically. It is indispensable to summarize the research progress in this area. This review summarizes recent research results of electrocatalysts and photocatalysts for hydrogen evolution reactions based on two-dimensional materials, mainly including MoS2, WS2, and their compounds. The challenges and future development directions of two-dimensional hydrogen evolution reaction electrocatalysts and photocatalysts are summarized and prospected as well.
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20

Yamada, Yusuke, Kentaro Yano, and Shunichi Fukuzumi. "Photocatalytic Hydrogen Evolution Using 9-Phenyl-10-methyl-acridinium Ion Derivatives as Efficient Electron Mediators and Ru-Based Catalysts." Australian Journal of Chemistry 65, no. 12 (2012): 1573. http://dx.doi.org/10.1071/ch12294.

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Photocatalytic hydrogen evolution has been performed by photoirradiation (λ > 420 nm) of a mixed solution of a phthalate buffer and acetonitrile (MeCN) (1 : 1 (v/v)) containing EDTA disodium salt (EDTA), [RuII(bpy)3]2+ (bpy = 2,2′-bipyiridine), 9-phenyl-10-methylacridinium ion (Ph–Acr+–Me), and Pt nanoparticles (PtNPs) as a sacrificial electron donor, a photosensitiser, an electron mediator, and a hydrogen-evolution catalyst, respectively. The hydrogen-evolution rate of the reaction system employing Ph–Acr+–Me as an electron mediator was more than 10 times higher than that employing a conventional electron mediator of methyl viologen. In this reaction system, ruthenium nanoparticles (RuNPs) also act as a hydrogen-evolution catalyst as well as the PtNPs. The immobilization of the efficient electron mediator on the surface of a hydrogen-evolution catalyst is expected to enhance the hydrogen-evolution rate. The methyl group of Ph–Acr+–Me was chemically modified with a carboxy group (Ph–Acr+–CH2COOH) to interact with metal oxide surfaces. In the photocatalytic hydrogen-evolution system using Ph–Acr+–CH2COOH and Pt-loaded ruthenium oxide nanoparticles (Pt/RuO2NPs) as electron donor and hydrogen-evolution catalyst, respectively, the hydrogen-evolution rate was 1.5–2 times faster than the reaction system using Ph–Acr+–Me as an electron mediator. On the other hand, no enhancement in the hydrogen-evolution rate was observed in the reaction system using Ph–Acr+–CH2COOH with PtNPs. Thus, the enhancement of hydrogen-evolution rate originated from the favourable interaction between Ph–Acr+–CH2COOH and RuO2NPs. These results suggest that the use of Ph–Acr+–Me as an electron mediator enables the photocatalytic hydrogen evolution using PtNPs and RuNPs as hydrogen-evolution catalysts, and the chemical modification of Ph–Acr+–Me with a carboxy group paves the way to utilise a supporting catalyst, Pt loaded on a metal oxide, as a hydrogen-evolution catalyst.
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21

Vigdorovich, V. I., L. E. Tsygankova, N. V. Shel, D. V. Balybin, and D. V. Kryilskiy. "Control of Kinetic Parameters and Rate-Determining Step Nature of Hydrogen Evolution Reaction on Iron." Advanced materials and technologies, no. 4 (2016): 041–45. http://dx.doi.org/10.17277/amt.2016.04.pp.041-045.

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22

Chen, Lisong, and Jianlin Shi. "Chemical-assisted hydrogen electrocatalytic evolution reaction (CAHER)." Journal of Materials Chemistry A 6, no. 28 (2018): 13538–48. http://dx.doi.org/10.1039/c8ta03741h.

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23

Harrington, David A. "Theory of electrochemical impedance of surface reactions: second-harmonic and large-amplitude response." Canadian Journal of Chemistry 75, no. 11 (November 1, 1997): 1508–17. http://dx.doi.org/10.1139/v97-181.

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The theory for the electrochemical impedance of surface reactions involving a single adsorbed species is presented. A new methodology is used, in which many harmonics are considered, and the differential equations are reduced to algebraic matrix equations. The amplitude of the ac potential perturbation is not assumed to be small, and nonlinear effects are taken into account. The amplitude dependence of the impedance and the second-harmonic response are investigated. The quasi-reversible electrosorption reaction and the hydrogen evolution reaction are considered in detail, assuming that the adsorbed species obeys the Langmuir isotherm. Keywords: electrochemistry, impedance, adsorption, hydrogen evolution reaction, second harmonic.
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24

Tretyakova, V. V., A. E. Ponomareva, V. V. Panteleeva, and А. B. Shein. "СОСТАВ, СТРУКТУРА И ЭЛЕКТРОХИМИЧЕСКАЯ АКТИВНОСТЬ СИЛИЦИДА ТИТАНА В РЕАКЦИИ ВЫДЕЛЕНИЯ ВОДОРОДА." Вестник Пермского университета. Серия «Химия» = Bulletin of Perm University. CHEMISTRY 11, no. 4 (2021): 263–70. http://dx.doi.org/10.17072/2223-1838-2021-4-263-270.

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The phase composition and structure of titanium silicide have been investigated by X-ray diffraction and X-ray spectral microanalysis methods. It has been found that the investigated silicide is a singlephase system consisting of a high-temperature TiSi2 modification with a rhombic face-centered lattice. The cathodic behavior of the TiSi2 electrode has been studied by the methods of polarization and capacitance measurements. It has been found that the cathodic potentiostatic curves of silicide in solutions of 0,5 M H2SO4; 0,5 M H2SO4 + 0,005 M NaF and1,0 M NaOHhave Tafel sections with slopes of 0,120; 0,097 and 0,109 V and they are characterized by the values of the hydrogen evolution overvoltage 0,90; 0,64 and 0,74 V (at i = 1 A/cm2), respectively. Titanium disilicide in sulfuric acid solution belongs to materials with a high overvoltage of hydrogen evolution, but in a fluoride-containing sulfuric acid solution and in an alkaline solution - to materials with a low overvoltage of hydrogen evolution. Based on measurements of the differential capacitance of the TiSi2 electrode (at f = 10 kHz), it has been concluded that a thin silicon dioxide film (Si + 2H2O → SiO2 + 4H+ + 4e–)is present on the surface of the silicide in the acidic fluoride-free electrolyte.
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25

Hu, Cun, Chao Lv, Shuai Liu, Yan Shi, Jiangfeng Song, Zhi Zhang, Jinguang Cai, and Akira Watanabe. "Nickel Phosphide Electrocatalysts for Hydrogen Evolution Reaction." Catalysts 10, no. 2 (February 5, 2020): 188. http://dx.doi.org/10.3390/catal10020188.

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The production of hydrogen through electrochemical water splitting driven by clean energy becomes a sustainable route for utilization of hydrogen energy, while an efficient hydrogen evolution reaction (HER) electrocatalyst is required to achieve a high energy conversion efficiency. Nickel phosphides have been widely explored for electrocatalytic HER due to their unique electronic properties, efficient electrocatalytic performance, and a superior anti-corrosion feature. However, the HER activities of nickel phosphide electrocatalysts are still low for practical applications in electrolyzers, and further studies are necessary. Therefore, at the current stage, a specific comprehensive review is necessary to focus on the progresses of the nickel phosphide electrocatalysts. This review focuses on the developments of preparation approaches of nickel phosphides for HER, including a mechanism of HER, properties of nickel phosphides, and preparation and electrocatalytic HER performances of nickel phosphides. The progresses of the preparation and HER activities of the nickel phosphide electrocatalysts are mainly discussed by classification of the preparation method. The comparative surveys of their HER activities are made in terms of experimental metrics of overpotential at a certain current density and Tafel slope together with the preparation method. The remaining challenges and perspectives of the future development of nickel phosphide electrocatalysts for HER are also proposed.
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26

He, Yuhao, Xiangpeng Chen, Yunchao Lei, Yongqi Liu, and Longlu Wang. "Revisited Catalytic Hydrogen Evolution Reaction Mechanism of MoS2." Nanomaterials 13, no. 18 (September 8, 2023): 2522. http://dx.doi.org/10.3390/nano13182522.

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MoS2 has long been considered a promising catalyst for hydrogen production. At present, there are many strategies to further improve its catalytic performance, such as edge engineering, defect engineering, phase engineering, and so on. However, at present, there is still a great deal of controversy about the mechanism of MoS2 catalytic hydrogen production. For example, it is generally believed that the base plane of MoS2 is inert; however, it has been reported that the inert base plane can undergo a transient phase transition in the catalytic process to play the catalytic role, which is contrary to the common understanding that the catalytic activity only occurs at the edge. Therefore, it is necessary to further understand the mechanism of MoS2 catalytic hydrogen production. In this article, we summarized the latest research progress on the catalytic hydrogen production of MoS2, which is of great significance for revisiting the mechanism of MoS2 catalytic hydrogen production.
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27

Marcandalli, Giulia, Katinka Boterman, and Marc T. M. Koper. "Understanding hydrogen evolution reaction in bicarbonate buffer." Journal of Catalysis 405 (January 2022): 346–54. http://dx.doi.org/10.1016/j.jcat.2021.12.012.

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28

Guo, Wenwu, Quyet Van Le, Ha Huu Do, Amirhossein Hasani, Mahider Tekalgne, Sa-Rang Bae, Tae Hyung Lee, Ho Won Jang, Sang Hyun Ahn, and Soo Young Kim. "Ni3Se4@MoSe2 Composites for Hydrogen Evolution Reaction." Applied Sciences 9, no. 23 (November 22, 2019): 5035. http://dx.doi.org/10.3390/app9235035.

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Transition metal dichalcogenides (TMDs) have been considered as one of the most promising electrocatalysts for the hydrogen evolution reaction (HER). Many studies have demonstrated the feasibility of significant HER performance improvement of TMDs by constructing composite materials with Ni-based compounds. In this work, we prepared Ni3Se4@MoSe2 composites as electrocatalysts for the HER by growing in situ MoSe2 on the surface of Ni3Se4 nanosheets. Electrochemical measurements revealed that Ni3Se4@MoSe2 nanohybrids are highly active and durable during the HER process, which exhibits a low onset overpotential (145 mV) and Tafel slope (65 mV/dec), resulting in enhanced HER performance compared to pristine MoSe2 nanosheets. The enhanced HER catalytic activity is ascribed to the high surface area of Ni3Se4 nanosheets, which can both efficiently prevent the agglomeration issue of MoSe2 nanosheets and create more catalytic edge sites, hence accelerate electron transfer between MoSe2 and the working electrode in the HER. This approach provides an effective pathway for catalytic enhancement of MoSe2 electrocatalysts and can be applied for other TMD electrocatalysts.
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29

Wu, Cong, Chuang Li, Boyu Yang, Siyuan Zhou, Dingcong Shi, Yanbo Wang, Guocheng Yang, Jin He, and Yuping Shan. "Electrospun MnCo2O4nanofibers for efficient hydrogen evolution reaction." Materials Research Express 3, no. 9 (September 13, 2016): 095018. http://dx.doi.org/10.1088/2053-1591/3/9/095018.

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30

Burchardt, T. "The hydrogen evolution reaction on NiPx alloys." International Journal of Hydrogen Energy 25, no. 7 (July 1, 2000): 627–34. http://dx.doi.org/10.1016/s0360-3199(99)00089-0.

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31

Xie, Aozhen, Ningning Xuan, Kun Ba, and Zhengzong Sun. "Pristine Graphene Electrode in Hydrogen Evolution Reaction." ACS Applied Materials & Interfaces 9, no. 5 (January 24, 2017): 4643–48. http://dx.doi.org/10.1021/acsami.6b14732.

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32

Jiang, Zhenzhen, Wenda Zhou, Aijun Hong, Manman Guo, Xingfang Luo, and Cailei Yuan. "MoS2 Moiré Superlattice for Hydrogen Evolution Reaction." ACS Energy Letters 4, no. 12 (October 30, 2019): 2830–35. http://dx.doi.org/10.1021/acsenergylett.9b02023.

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33

Wang, Hao, and Lijun Gao. "Recent developments in electrochemical hydrogen evolution reaction." Current Opinion in Electrochemistry 7 (January 2018): 7–14. http://dx.doi.org/10.1016/j.coelec.2017.10.010.

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34

SAHA, SOUMEN, SONALIKA VAIDYA, KANDALAM V. RAMANUJACHARY, SAMUEL E. LOFLAND, and ASHOK K. GANGULI. "Ternary alloy nanocatalysts for hydrogen evolution reaction." Bulletin of Materials Science 39, no. 2 (April 2016): 433–36. http://dx.doi.org/10.1007/s12034-016-1182-2.

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35

Awaludin, Zaenal, Takeyoshi Okajima, and Takeo Ohsaka. "Electroreduced Tantalum Pentaoxide for Hydrogen Evolution Reaction." Chemistry Letters 43, no. 8 (August 5, 2014): 1248–50. http://dx.doi.org/10.1246/cl.140312.

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36

Miao, H. J., and D. L. Piron. "Composite-coating electrodes for hydrogen evolution reaction." Electrochimica Acta 38, no. 8 (June 1993): 1079–85. http://dx.doi.org/10.1016/0013-4686(93)80216-m.

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37

Palowska, Renata, Joanna Bogusz, Leszek Zaraska, Marcin Kozieł, Marta Gajewska, Lifeng Liu, Grzegorz Dariusz Sulka, and Agnieszka Brzozka. "Nickel Phosphide Nanomaterials for Hydrogen Evolution Reaction." ECS Meeting Abstracts MA2020-02, no. 15 (November 23, 2020): 1429. http://dx.doi.org/10.1149/ma2020-02151429mtgabs.

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38

Rajeswari, Janarthanan, Pilli Satyananda Kishore, Balasubramanian Viswanathan, and Thirukkallam Kanthadai Varadarajan. "Facile Hydrogen Evolution Reaction on WO3 Nanorods." Nanoscale Research Letters 2, no. 10 (September 1, 2007): 496–503. http://dx.doi.org/10.1007/s11671-007-9088-y.

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39

Thiel, Werner R. "Hydrogen Evolution from Peroxides− a Concerted Reaction." European Journal of Organic Chemistry 2004, no. 14 (July 2004): 3108–12. http://dx.doi.org/10.1002/ejoc.200400127.

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40

Xie, Song, Hao Dong, Xiang Peng, and Paul K. Chu. "Non-precious Electrocatalysts for the Hydrogen Evolution Reaction." Innovation Discovery 1, no. 2 (May 17, 2024): 11. http://dx.doi.org/10.53964/id.2024011.

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The development of non-precious metal-based catalysts for the hydrogen evolution reaction (HER) is a promising research area with the potential to advance water electrolysis and enable the widespread use of hydrogen as a clean energy source. While noble metals like Pt and Pd exhibit excellent HER activity, their limited availability and high cost present significant challenges. Non-precious transition metals such as Fe, Co, and Ni have emerged as alternative catalyst materials due to their natural abundance. However, these metals often encounter obstacles related to their hydrogen adsorption behavior. This commentary highlights the various strategies employed to optimize the electronic structures of non-precious metal-based catalysts to enhance the HER performance. The outlook of non-precious metal-based catalysts is bright, with ongoing and future research activities mainly focusing on improving their properties, integrating these catalysts into commercial water electrolysis systems, and improving the scalability for large-scale hydrogen production. The development of high-performance non-precious metal-based catalysts for HER is crucial to future sustainable and efficient hydrogen production in the transition from fossil fuels to clean energy.
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41

Liu, Xiangye, Xin Wang, Xiaotao Yuan, Wujie Dong, and Fuqiang Huang. "Rational composition and structural design of in situ grown nickel-based electrocatalysts for efficient water electrolysis." Journal of Materials Chemistry A 4, no. 1 (2016): 167–72. http://dx.doi.org/10.1039/c5ta07047c.

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42

Zhou, JiaYu, Zili Li, JianGuo Liu, Xiao Xing, Gan Cui, ShouXin Zhang, Ran Cheng, and YiShu Wang. "Effect of AC interference on hydrogen evolution reaction of x80 steel." Anti-Corrosion Methods and Materials 67, no. 2 (January 20, 2020): 197–204. http://dx.doi.org/10.1108/acmm-11-2019-2216.

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Purpose The purpose of this paper is to quantify the influence of alternating current (AC) interference on hydrogen evolution reaction of X80 steel. Design/methodology/approach The hydrogen evolution potential was obtained by cathodic potentiodynamic polarization curve. The instantaneous potential under AC interference was obtained by high-frequency acquisition with three-electrode system. Electrochemical impedance spectroscopy and Tafel polarization curves were used to study the influence mechanism of AC interference on instantaneous potential. Findings It was concluded that the hydrogen evolution reaction could occur on X80 steel under AC interference. There were critical AC current densities of about 100 to 200 A/m2, beyond which the cathode reaction of X80 steel changed from oxygen absorption to hydrogen evolution. Besides the pH value, the initial polarization potential EZ and impedance module of the steel/electrolyte interface under AC interference were also the factors that affected the critical AC densities in different solutions. Originality/value This research quantified the hydrogen evolution capacity of X80 steel under AC interference, which could be applied to clear the effect of AC interference on hydrogen evolution reaction.
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43

Al-Odail, Faisal A., Alexandros Anastasopoulos, and Brian E. Hayden. "The hydrogen evolution reaction and hydrogen oxidation reaction on thin film PdAu alloy surfaces." Physical Chemistry Chemical Physics 12, no. 37 (2010): 11398. http://dx.doi.org/10.1039/b924656h.

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44

Zhang, Yingbo, Junan Pan, Gu Gong, Renxuan Song, Ye Yuan, Mengzhu Li, Weifeng Hu, Pengcheng Fan, Lexing Yuan, and Longlu Wang. "In Situ Surface Reconstruction of Catalysts for Enhanced Hydrogen Evolution." Catalysts 13, no. 1 (January 5, 2023): 120. http://dx.doi.org/10.3390/catal13010120.

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The in situ surface reconstitution of a catalyst for hydrogen evolution refers to its structure evolution induced by strong interactions with reaction intermediates during the hydrogen evolution reaction (HER), which eventually leads to the self-optimization of active sites. In consideration of the superior performance that can be achieved by in situ surface reconstitution, more and more attention has been paid to the relationship between active site structure evolution and the self-optimization of HER activity. More and more in situ and/or operando techniques have been explored to track the dynamic structural evolution of HER catalysts in order to clarify the underlying mechanism. This review summarizes recent advances in various types of reconstruction such as the reconfiguration of crystallinity, morphological evolution, chemical composition evolution, phase transition refactoring, surface defects, and interface refactoring in the HER process. Finally, different perspectives and outlooks are offered to guide future investigations. This review is expected to provide some new clues for a deeper understanding of in situ surface reconfiguration in hydrogen evolution reactions and the targeted design of catalysts with desirable structures.
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45

Gutić, Sanjin J., Ana S. Dobrota, Edvin Fako, Natalia V. Skorodumova, Núria López, and Igor A. Pašti. "Hydrogen Evolution Reaction-From Single Crystal to Single Atom Catalysts." Catalysts 10, no. 3 (March 4, 2020): 290. http://dx.doi.org/10.3390/catal10030290.

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Hydrogen evolution reaction (HER) is one of the most important reactions in electrochemistry. This is not only because it is the simplest way to produce high purity hydrogen and the fact that it is the side reaction in many other technologies. HER actually shaped current electrochemistry because it was in focus of active research for so many years (and it still is). The number of catalysts investigated for HER is immense, and it is not possible to overview them all. In fact, it seems that the complexity of the field overcomes the complexity of HER. The aim of this review is to point out some of the latest developments in HER catalysis, current directions and some of the missing links between a single crystal, nanosized supported catalysts and recently emerging, single-atom catalysts for HER.
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46

Sun, Xiaorui, and Jia Yang. "A Mini Review on Borate Photocatalysts for Water Decomposition: Synthesis, Structure, and Further Challenges." Molecules 29, no. 7 (March 29, 2024): 1549. http://dx.doi.org/10.3390/molecules29071549.

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The development of novel photocatalysts, both visible and UV-responsive, for water decomposition reactions is of great importance. Here we focused on the application of the borates as photocatalysts in water decomposition reactions, including water splitting reaction, hydrogen evolution half-reaction, and oxygen evolution half-reaction. In addition, the rates of photocatalytic hydrogen evolution and oxygen evolution by these borate photocatalysts in different water decomposition reactions were summarized. Further, the review summarized the synthetic chemistry and structural features of existing borate photocatalysts for water decomposition reactions. Synthetic chemistry mainly includes high-temperature solid-state method, sol-gel method, precipitation method, hydrothermal method, boric acid flux method, and high-pressure method. Next, we summarized the crystal structures of the borate photocatalysts, with a particular focus on the form of the B-O unit and metal-oxygen polyhedral in the borates, and used this to classify borate photocatalysts, which are rarely mentioned in the current photocatalysis literature. Finally, we analyzed the relationship between the structural features of the borate photocatalysts and photocatalytic performance to discuss the further challenges faced by the borate photocatalysts for water decomposition reactions.
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47

Singh, Harjinder, Imtiaz Ahmed, Rathindranath Biswas, Shouvik Mete, Krishna Kamal Halder, Biplab Banerjee, and Krishna Kanta Haldar. "Genomic DNA-mediated formation of a porous Cu2(OH)PO4/Co3(PO4)2·8H2O rolling pin shape bifunctional electrocatalyst for water splitting reactions." RSC Advances 12, no. 6 (2022): 3738–44. http://dx.doi.org/10.1039/d1ra09098d.

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Among the accessible techniques, the production of hydrogen by electrocatalytic water oxidation is the most established process, which comprises oxygen evolution reaction (OER) and hydrogen evolution reaction (HER).
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48

Popic, Jovan, and Dragutin Drazic. "Electrochemistry of active chromium, part III: Effects of temperature." Journal of the Serbian Chemical Society 68, no. 11 (2003): 871–82. http://dx.doi.org/10.2298/jsc0311871p.

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It was shown that the temperature in the range 20 ? 65 ?C has considerable effects on the electrochemical anodic dissolution of chromium in the active potential range as well as on the electrochemical hydrogen evolution reactions on bare and oxide covered chromium surfaces. Also, the chemical dissolution of chromium is strongly affected. The apparent energy of activation for anodic dissolution is 63.1 kJ mol-1, for hydrogen evolution on a bare Cr surface 19.5 kJ mol-1, for the same reaction on an oxide covered surface 44.0 kJ mol-1 and for the chemical ("anomalous") dissolution 66.9 kJ mol-1. The temperature dependences of the total corrosion rate, and the electrochemical corrosion rate alone, are presented in polynomial forms with the appropriate constants obtained by the best fit of the experimental data. For the hydrogen evolution reaction on both bare and oxide covered chromium, the Volmer-Heyrovsky reaction mechanism with the second step as rate determining was proposed.
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49

Lei, Yu, Hongdian Chen, Chenyang Shu, and Changguo Chen. "Fe- and S-Modified BiOI as Catalysts to Oxygen Evolution and Hydrogen Evolution Reactions in Overall Photoelectrochemical Water Splitting." Materials 17, no. 1 (December 19, 2023): 6. http://dx.doi.org/10.3390/ma17010006.

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Developing catalysts with superior activity to hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is equally important to the overall photoelectrochemical water splitting to produce hydrogen. In this work, bismuth oxyiodide (BiOI), iron-modified bismuth iodide Fe/BiOI, and the sulfurized S-Fe/BiOI were prepared using the solvothermal method. The three materials all have good absorption ability for visible light. The photoelectrochemical catalytic activity of BiOI to oxygen evolution reaction (OER) is significantly enhanced after iron modification, while the sulfurized product S-Fe/BiOI exhibits better catalytic activity to hydrogen evolution reaction (HER). Hence, OER and HER can be simultaneously catalyzed by using Fe/BiOI and S-Fe/BiOI as anodic and cathodic catalysts to facilitate the overall photoelectrochemical water splitting process.
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50

Quach, Qui, Erik Biehler, and Tarek M. Abdel-Fattah. "Synthesis of Palladium Nanoparticles Supported over Fused Graphene-like Material for Hydrogen Evolution Reaction." Catalysts 13, no. 7 (July 17, 2023): 1117. http://dx.doi.org/10.3390/catal13071117.

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The search for a clean abundant energy source brought hydrogen gas into the limelight; however, the explosive nature of the gas brings up issues with its storage. A way to mitigate this danger is through the storing of hydrogen in a hydrogen feedstock material, which contains a large percentage of its weight as hydrogen. Sodium borohydride is a feedstock material that gained a lot of attention as it readily reacts with water to release hydrogen. This study explored a novel composite composed of palladium nanoparticles supported on a sugar-derived fused graphene-like material support (PdFGLM) for its ability to catalyze the reaction of sodium borohydride in water. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) were used to characterize and determine the size and shape of the catalyst used in this study. The XRD study detected the presence of palladium nanoparticles, and the EDS date confirmed the presence of 3% palladium nanoparticles. The TEM result shows the palladium nanoparticles of 5.5 nm incorporated to the graphene-like material layers. The composite contained approximately 3% palladium. In the hydrogenation reactions, it was observed that optimal reaction conditions included lower pHs, increased temperatures, and increased dosages of sodium borohydride. The reaction had the greatest hydrogen generation rate of 0.0392 mL min−1 mgcat−1 at pH 6. The catalyst was tested multiple times in succession and was discovered to increase the volume of hydrogen produced, with later trials indicating the catalyst becomes more activated with multiple uses. The activation energy of the reaction as catalyzed by PdFGLM was found to be 45.1 kJ mol−1, which is comparable to other catalysts for this reaction. This study indicates that this catalyst material has potential as a sustainable material for the generation of hydrogen.
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