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Journal articles on the topic 'Operando differential electrochemical mass spectroscopy (DEMS)'

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Published: 5 June 2025
Last updated: 16 July 2025

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1

Voronina, Natalia, and Seung-Taek Myung. "Investigation of Anionic and Cationic Redox Chemistry in P3-Type Na0.67[Zn0.3Mn0.7]O2 Layered Sodium Cathode with Zn Displacement." ECS Meeting Abstracts MA2024-02, no. 9 (2024): 1300. https://doi.org/10.1149/ma2024-0291300mtgabs.

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Oxygen redox-based layered cathode materials, such as P2/P3-types Nax[AyMn1-y]O2 (A=Li, Mg, Zn, vacancy), are of great importance to realize high-energy-density sodium-ion batteries (SIBs). In this work, we introduce a novel oxygen redox-based layered cathode material, P3-type Na0.67[Zn0.3Mn0.7]O2 with Na-O-Zn local configuration (Figure a,b). We investigate the effect of Zn doping on the electrochemical performance using a variety of methods such as galvanostatic potential cycling (Figure b), operando-X-ray diffraction (o-XDR) (Figure c), X-ray absorption near-edge structure (XANES), X-ray ph
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2

Zhang, Li, Liang Yin, Weiqun Li, Hou Xu, B. Layla Mehdi, and Nuria Tapia Ruiz. "(Digital Presentation) Regulating Anion Redox during Cycling of Spinel LiMn1.5Ni0.5O4 As Cathodes for Lithium Ion Batteries." ECS Meeting Abstracts MA2022-01, no. 2 (2022): 380. http://dx.doi.org/10.1149/ma2022-012380mtgabs.

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In recent years, extensive research has been performed on high energy cathode materials for lithium ion batteries being used in electric vehicles to reduce carbon emissions. Compared to the commercial layered cathode materials, the absence of cobalt in the spinel LiMn1.5Ni0.5O4 (LMNO) makes this material more environmentally friendly and cheaper.1 Spinel LMNO cathodes also reveal attractive gravimetric and volumetric energy densities of 635Whkg−1 and 2820WhL−1, respectively.2 According to the distribution of transition metals (TM) within the cubic crystal structure, spinel LMNO can be categori
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3

Shimizu, Shugo, Atsunori Ikezawa, Takeyoshi Okajima, and Hajime Arai. "Quantitative Differential Electrochemical Mass Spectroscopy Analysis of Electrochemical Carbon Corrosion Reactions in Alkaline Electrolyte Solutions." ECS Meeting Abstracts MA2024-02, no. 60 (2024): 4054. https://doi.org/10.1149/ma2024-02604054mtgabs.

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Introduction Zinc-air secondary batteries are attracting attention as next-generation large-scale energy storage devices. However, one of the challenges for practical application is the prevention of air electrode degradation caused by the oxidative corrosion of carbon. In order to suppress the carbon corrosion reaction, clarification of the reaction mechanism is required. The differential electrochemical mass spectrometry (DEMS) is the in-situ mass spectrometry for the volatile species generated by electrochemical reactions, and it is possible to measure the partial current of the carbon corr
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4

Ye, Ke, Guiru Zhang, Xian-Yin Ma, et al. "Resolving local reaction environment toward an optimized CO2-to-CO conversion performance." Energy & Environmental Science 15, no. 2 (2022): 749–59. http://dx.doi.org/10.1039/d1ee02966e.

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Operando differential electrochemical mass spectroscopy investigation reveals the critical microenvironment of electrode surface topology, interfacial electric field and reactant concentration in determining CO2 electrolysis performance.
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Ikezawa, Atsunori, Juri Kida, Shugo Shimizu, and Hajime Arai. "Quantitative Analysis of CO2 Evolution in an Alkaline Electrolyte Solution By Differential Electrochemical Mass Spectroscopy." ECS Meeting Abstracts MA2023-02, no. 55 (2023): 2686. http://dx.doi.org/10.1149/ma2023-02552686mtgabs.

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CO2 is involved in various main and side reactions of electrochemical energy devices, such as carbon corrosion reactions and alcohol oxidation reactions. Differential electrochemical mass spectroscopy (DEMS) has been intensively applied in acidic electrolyte solutions to analyze these reactions. DEMS is the in-situ electrochemical measurement technique to analyze volatile species with the mass spectrometer (MS). However, the applications of DEMS to alkaline electrolyte solutions have been limited due to the high solubility of CO2 in alkaline solutions. While "conventional DEMS cells," where po
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6

Fujikawa, Keikichi, and Feng Li. "A Review of Differential Electrochemical Mass Spectroscopy Technique Ⅱ.The principle and development of DEMS." Journal of Electrochemistry 2, journal/vol2/iss4 (1996): 357–61. http://dx.doi.org/10.61558/2993-074x.3497.

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7

Fujihira, Masamichi, and Toshimitsu Noguchi. "A Highly Sensitive Analysis of Electrochemical Reduction Products of CO2on Gold by New Differential Electrochemical Mass Spectroscopy (DEMS)." Chemistry Letters 21, no. 10 (1992): 2043–46. http://dx.doi.org/10.1246/cl.1992.2043.

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8

Bogdanoff, P., and N. Alonso-Vante. "On-line Determination via Differential Electrochemical Mass Spectroscopy (DEMS) of Chemical Products Formed in Photoelectrocatalytical Systems." Berichte der Bunsengesellschaft für physikalische Chemie 97, no. 7 (1993): 940–43. http://dx.doi.org/10.1002/bbpc.19930970716.

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9

Brimaud, Sylvain, Zenonas Jusys, and R. Jürgen Behm. "Shape-selected nanocrystals for in situ spectro-electrochemistry studies on structurally well defined surfaces under controlled electrolyte transport: A combined in situ ATR-FTIR/online DEMS investigation of CO electrooxidation on Pt." Beilstein Journal of Nanotechnology 5 (May 28, 2014): 735–46. http://dx.doi.org/10.3762/bjnano.5.86.

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The suitability and potential of shape selected nanocrystals for in situ spectro-electrochemical and in particular spectro-electrocatalytic studies on structurally well defined electrodes under enforced and controlled electrolyte mass transport will be demonstrated, using Pt nanocrystals prepared by colloidal synthesis procedures and a flow cell set-up allowing simultaneous measurements of the Faradaic current, FTIR spectroscopy of adsorbed reaction intermediates and side products in an attenuated total reflection configuration (ATR-FTIRS) and differential electrochemical mass spectrometry (DE
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10

Yoo, Ji Mun, Katharina Trapp, and Maria R. Lukatskaya. "Electrolyte Engineering for Improved Selectivity of Electrochemical CO2 Reduction." ECS Meeting Abstracts MA2023-02, no. 54 (2023): 2619. http://dx.doi.org/10.1149/ma2023-02542619mtgabs.

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Electrochemical CO2 reduction reaction (eCO2RR) offers a promising solution to produce valuable chemical building blocks especially when coupled with renewable energy sources. However, its practical application faces significant challenges including low production selectivity due to competing hydrogen evolution reactions (HER). As both reactions are highly sensitive to the chemical environment formulated around active sites within electrochemical double layer (EDL), a comprehensive understanding is required on the role of electrolyte components, such as cation, anion, local pH, and water molec
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11

Im, Eunmi, Kyungeun Baek, Jaehyun Park, HoJun Seo, Seok Ju Kang, and Geon Dae Moon. "“Water-in-Salt” and Nasicon Electrolyte-Based Na-CO2 Battery." ECS Meeting Abstracts MA2022-02, no. 64 (2022): 2308. http://dx.doi.org/10.1149/ma2022-02642308mtgabs.

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Super concentrated electrolytes, referred to as “water-in-salt (WiS) electrolytes”, have been received attention due to their wide electrochemical stability window, cost-effectiveness, and non-flammability. However, the free water molecules present in WiS electrolytes prevent the use of Na-metal as the anode for Na-gas batteries. In this study, we develop a Na-CO2 battery with WiS and Na-super-ionic conductor (NASICON) electrolytes that were used as energy storage cells and CO2 gas utilization. The NASICON separator allowed us to fabricate a hybrid Na-CO2 battery comprising Na metal as the ano
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Im, Eunmi, Seok Ju Kang, and Geon Dae Moon. "“Water-in-Salt” and Nasicon Electrolyte-Based Na-CO2 Battery." ECS Meeting Abstracts MA2022-01, no. 4 (2022): 537. http://dx.doi.org/10.1149/ma2022-014537mtgabs.

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Aprotic electrolytes are much less feasible for producing cost-effective Na metal-based CO2 batteries due to high cost and flammability. As an alternative electrolyte, super-concentrated electrolytes, referred to as “water-in-salt (WiS) electrolytes”, have been received attention due to their wide electrochemical stability window, cost-effectiveness, and non-flammability. However, the highly reactive Na metal prevents the direct use of WiS electrolytes because the unsolvated water molecules would react with the Na Metal. In this study, we demonstrated the ability of a WiS and NASICON electroly
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13

Li, Qingyu, Yichao Hou, Jie Yin, and Pinxian Xi. "The Evolution of Hexagonal Cobalt Nanosheets for CO2 Electrochemical Reduction Reaction." Catalysts 13, no. 10 (2023): 1384. http://dx.doi.org/10.3390/catal13101384.

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The CO2 electrochemical reduction reaction (CO2RR) is one of the most promising methods to reduce carbon dioxide emissions and store energy. At the same time, the pathways of CO2 reduction reaction are diverse and the products are abundant. Converting carbon dioxide to C2+ products, a critical feedstock, requires a C–C coupling step with the transfer of more than 10 electrons per molecule and, hence, is kinetically sluggish. The production of some key adsorptions is conducive to the formation of C2+ products. In this work, we used in situ techniques to figure out the reason why hexagonal-close
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14

Rastinejad, Justin, Bernardine Lucia Deborah Rinkel, and Bryan D. McCloskey. "Quantifying Mixed Redox and Parasitic Processes in Li-Rich Disordered Rocksalt Li-Ion Battery Cathodes." ECS Meeting Abstracts MA2024-01, no. 53 (2024): 2796. http://dx.doi.org/10.1149/ma2024-01532796mtgabs.

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Li-ion battery demand is expected to increase dramatically as the transportation and power generation sectors become electrified. To address the expense and scarcity of cobalt and nickel used in current layered cathodes, alternative transition metals must be explored. Disordered rocksalt (DRX) cathodes can be fully comprised of affordable, earth-abundant metals such as manganese and titanium and have shown high practical capacity but currently suffer from poor capacity retention and voltage fade [1]. Many researchers have attributed this to O redox, and the subsequent formation of deleterious
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15

Subhakumari, Akhila, and Naga Phani B. Aetukuri. "Electrochemical Analysis of Charge Overpotentials in Non-Aqueous Lithium and Sodium Oxygen Batteries." ECS Meeting Abstracts MA2023-02, no. 4 (2023): 595. http://dx.doi.org/10.1149/ma2023-024595mtgabs.

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Aprotic metal-oxygen batteries, especially Li-O2 and Na-O2 batteries, could afford theoretical specific energies of more than 500 Wh/kg. However, while not compromising on rechargeability, the practical realization of the theoretically possible high specific energies has been elusive. A better understanding of the differences and similarities between Li–O2 and Na–O2 battery systems in terms of charge-discharge mechanisms and parasitic chemistry will be meaningful in solving these challenges. Here, we explore the differences between the two systems using a combination of galvanostatic charge-di
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16

Hall, David S., Rhodri Jervis, Louis F. J. Piper, Alexandra L. Kersting, and Clare P. Grey. "Battery Degradation and Lifetime – Studies within the Faraday Institution on NMC811/Graphite Full Cells." ECS Meeting Abstracts MA2022-01, no. 2 (2022): 341. http://dx.doi.org/10.1149/ma2022-012341mtgabs.

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Lithium-ion batteries (LIBs) find use in a wide range of applications, each of which has its own design specifications and practical requirements. With regards to the role of LIBs in mitigating carbon emissions, and therefore climate change, it is desirable to support the rapidly growing adoption of electric vehicles and renewable grid-storage systems via development of higher energy density, lower cost, and improved rate capability. However, the design of energy-dense, low-cobalt, and/or high-rate cell chemistries is impeded by inherent trade-offs with cycling and calendar lifetimes. A key go
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17

mosen Harzandi, Ahmad, Adel Azaribeni, and Mohammad Asadi. "A Rechargeable Solid-State Sodium-Oxygen Battery with Enhanced Energy Efficiency and Cycle Life." ECS Meeting Abstracts MA2024-01, no. 1 (2024): 22. http://dx.doi.org/10.1149/ma2024-01122mtgabs.

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Sodium-oxygen (Na-O2) batteries offer a promising path for the advancement of high-energy-density inexpensive storage systems to replace current state of the art Li-based batteries owing to the natural abundance and low-cost Na metal. Despite numerous studies to improve the performance of liquid-based electrolyte Na-O2 batteries, this technology suffers from poor cycle life, electrolyte stability issues, and limited choice of cell design as well as growing safety concerns associated with liquid electrolytes. Recently, solid electrolytes received a great attention to substitute traditional liqu
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18

Li, Jingyi, Xiang Li, Charuni M. Gunathunge, and Matthias M. Waegele. "Hydrogen bonding steers the product selectivity of electrocatalytic CO reduction." Proceedings of the National Academy of Sciences 116, no. 19 (2019): 9220–29. http://dx.doi.org/10.1073/pnas.1900761116.

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The product selectivity of many heterogeneous electrocatalytic processes is profoundly affected by the liquid side of the electrocatalytic interface. The electrocatalytic reduction of CO to hydrocarbons on Cu electrodes is a prototypical example of such a process. However, probing the interactions of surface-bound intermediates with their liquid reaction environment poses a formidable experimental challenge. As a result, the molecular origins of the dependence of the product selectivity on the characteristics of the electrolyte are still poorly understood. Herein, we examined the chemical and
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19

Rastinejad, Justin, and Bryan D. McCloskey. "Understanding High Voltage Electrolyte Reactivity on Cation-Disordered Rock Salt Cathodes." ECS Meeting Abstracts MA2024-02, no. 7 (2024): 1001. https://doi.org/10.1149/ma2024-0271001mtgabs.

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Li-ion battery demand is expected to increase dramatically to meet rapidly increasing energy storage demands. To address the expense and scarcity of cobalt and nickel used in current layered oxide cathodes, alternative cathode materials that rely on earth-abundant transition metals must be explored. Promising such materials are cation-disordered rocksalt (DRX) oxides, particularly those that are comprised of manganese and titanium, along with lithium excess to allow for high reversible capacities (>300 mAh/g). A substantial fraction of extractable lithium capacity in DRX materials occurs at
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20

Rinkel, Bernardine Lucia Deborah, Rania Khaled Ahmed, Evan Walter Clark Spotte-Smith, Sudarshan Vijay, Kristin A. Persson, and Bryan D. McCloskey. "Decomposition of Electrolyte Solutions at Positive Electrodes." ECS Meeting Abstracts MA2024-01, no. 2 (2024): 303. http://dx.doi.org/10.1149/ma2024-012303mtgabs.

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Preventing the decomposition reactions of electrolyte solutions is essential for extending the lifetime of lithium-ion batteries. However, the high voltage (>4.5 V) reactivity of commonly used electrolyte solutions is still poorly understood; electrolyte decomposition at the positive electrode is generally believed to proceed via electrochemical oxidation of the organic carbonate solvent,1 while more recent work has revealed an alternative pathway involving reactive lattice oxygen species originating from the positive electrode (i.e., singlet oxygen).2 Unfortunately, we still have a limited
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21

Reuter, Lennart, Leonhard J. Reinschlüssel, and Hubert Andreas Gasteiger. "Development of a 3-Electrode Setup for the Operando Detection of Parasitic Side Reactions: Exemplified at the Quantification of Released Oxygen." ECS Meeting Abstracts MA2024-01, no. 2 (2024): 201. http://dx.doi.org/10.1149/ma2024-012201mtgabs.

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The most considerable push to higher energy density Li-ion batteries (LiBs) has been achieved by incremental improvements of the positive electrode cathode active materials (CAM).1 One approach has been to increase the nickel content of layered transition metal oxide CAMs like lithium nickel cobalt aluminum oxide (NCA; LiNixCoyAlzO2, with x+y+z=1) to above 80%, which has already been achieved on a commercial level. While this increase is accommodated by a higher achievable discharge capacity at a given upper cut-off potential, it also reduces the structural stability of the material at high de
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Lee, Eunryeol, Chanhyun Park, Su Hwan Kim, Sang Kyu Kwak, Nam-Soon Choi, and Hyun-Kon Song. "Malonic-Acid-Functionalized Fullerene Enables the Interfacial Stabilization of Ni-Rich Cathode in Lithium-Ion Batteries." ECS Meeting Abstracts MA2022-02, no. 3 (2022): 321. http://dx.doi.org/10.1149/ma2022-023321mtgabs.

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The continued demand for long-lasting batteries essentially drives us to contribute to a development of high-performance cathode materials, because a cathode material which is one of essential components in Li-ion batteries (LIBs) critically determines an overall energy density of a battery. High-capacity Ni-rich NCM (x > 80%, LiNixCoyMnzO2, x+y+z=1) cathode materials have been regarded as one of the most promising candidates to realize high-energy density Li-ion batteries. However, the complete application has been limited due to some critical problems, especially the unstable interfacial
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Lim, Jungwoo, Rory Powell, and Laurence J. Hardwick. "Gas Evolution from Sulfide-Based All-Solid-State Batteries." ECS Meeting Abstracts MA2022-01, no. 2 (2022): 231. http://dx.doi.org/10.1149/ma2022-012231mtgabs.

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The demand for high-performance batteries for electrical vehicles (EV) and large-scale energy storage systems have accelerated the development of all-solid-state batteries. Switching from organic liquid electrolyte to solid electrolyte (SE) ensures, not only the high energy density (Wh/L), but also an intrinsic improvement to safety from the removal of flammable solvent in the liquid electrolyte. However, for the development of all-solid-state batteries, still many problems exist toward commercialisation. One challenge is their chemical/electrochemical stability. In case of Li6PS5Cl argyrodite
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Binder, Markus, Matthias Kuenzel, Thomas Diemant, et al. "A Ternary Additive Mixture for Suppressed Electrolyte Decomposition and Mitigated Gassing in 5V Lnmo‖Graphite Li-Ion Cells." ECS Meeting Abstracts MA2022-02, no. 3 (2022): 204. http://dx.doi.org/10.1149/ma2022-023204mtgabs.

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The cobalt-free spinel LiNi0.5Mn1.5O4 (LNMO) represents a promising candidate for more sustainable high-energy lithium-ion cathodes due to its high operating voltage (4.7 V vs. Li+/Li), low cost and environmental impact, especially when processed in aqueous suspension with water-soluble binders.[1,2] Although the intrinsic properties of the material are already studied extensively and understood quite well, the high working potential still poses challenges for LNMO-comprising lithium-ion battery cells, which need to be addressed before the material can be successfully commercialised. This spec
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Bazan, Antony, Gonzalo García, Angélica María Baena-Moncada, and Elena Pastor. "Ni Foam-Supported NiMo Catalysts for the HER." ECS Meeting Abstracts MA2022-01, no. 34 (2022): 1390. http://dx.doi.org/10.1149/ma2022-01341390mtgabs.

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In the last years, “green hydrogen” fuel had gained a strong relevance due to its potential as friendly-environment energy source to replace fossil fuels. “Green hydrogen” fuel is obtained from water splitting by electrolysis, which can be powered by renewable energy sources, avoiding the emission of CO2 gas as by-product [1]. Particularly, alkaline water splitting has been, extensively, reported as the most sustainable and low-cost route for “green hydrogen” production. However, either oxygen (OER) or hydrogen evolution (HER) half-reaction can be limited by low-relative abundance of noble met
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Hensle, Niklas, and Tom Smolinka. "Understanding Mass Transport at High Current Densities in an Industrial Scale PEM Electrolysis Test Cell - a Segmented Along-the-Channel Approach." ECS Meeting Abstracts MA2024-01, no. 34 (2024): 1849. http://dx.doi.org/10.1149/ma2024-01341849mtgabs.

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Industrial PEM water electrolysis stack designs can suffer from an unevenly distributed water amount over the cell area. This can lead to performance differences and thermal hot spots due to the lack of reactant supply and poor thermal management. Undersupplied spots could also degrade more quickly [1,2]. Especially in the water flow direction, gradients are expected due to the water consumption and gas evolution and accumulation along the supply channels. To face these issues, we built up a segmented along the channel (AtC) PEM electrolysis test cell in industrial scale for locally-resolved i
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Lissandrello, Federico, Maria R. Lukatskaya, and Luca Magagnin. "Electrodeposition of Copper Clusters during Electrolytic Zinc Phosphating to Increase Nitrate Reduction Selectivity." ECS Meeting Abstracts MA2024-02, no. 22 (2024): 1846. https://doi.org/10.1149/ma2024-02221846mtgabs.

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Despite being one of the most widespread and well-established surface treatments, conversion phosphating is often scrutinized because of its negative impact on the environment. Electrolytic phosphate coatings are perhaps the primary candidates to lead the phasing out of the old conversion technology, while also offering similar material performance. [1] In this embodiment of the process, the formation of phosphate crystals is promoted by the application of a cathodic potential to the substrate, triggering hydrogen evolution (HER) and nitrate reduction (NO3R) at the interface. These two reactio
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28

Faverge, Theo, Antoine Bonnefont, Marian Chatenet, and Christophe Coutanceau. "Electrocatalytic Conversion of Glucose into Hydrogen and Value-Added Compounds on Gold and Nickel Catalysts." ECS Meeting Abstracts MA2023-02, no. 27 (2023): 1421. http://dx.doi.org/10.1149/ma2023-02271421mtgabs.

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Fine chemistry historically relies on the fossil fuel industry, implying oil extraction and refining [1]. The rarefaction of this resource and adverse environmental consequences of its extraction motivate research for alternative sources of chemicals. Low carbon footprint chemicals can be synthesized from nonedible biomass waste [2]; cellulose extracted from biomass can therefore play an important role, being a clean and widely accessible carbon source. One can extract D-Glucose (units that constitute cellulose) from cellulose and obtain numerous chemicals of interest, such as sorbitol [3][4]
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29

Chandran, Ashly P., Soumi Mondal, Devender Goud, et al. "In Situ Metal Vacancy Filling in Stable Pd‐Sn Intermetallic Catalyst for Enhanced CC Bond Cleavage in Ethanol Oxidation." Advanced Materials, December 17, 2024. https://doi.org/10.1002/adma.202415362.

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AbstractA common challenge in electrochemical processes is developing high performance, stable catalysts for specific chemical reactions. In this work, a Pd‐Sn intermetallic compound with Pd site deficiency (Pd1.9−xSn) (x = 0.06) and trace amount of SnOx was synthesised by controlled process. Under the electrochemical conditions, the deficient Pd site is filled by metallic Sn, which generates a highly active and stable (Pd1.84Sn0.06)Sn catalyst for ethanol oxidation reaction (EOR). The crystal structure and atomic arrangements for synthesized and in situ generated compound are comprehensively
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Wang, Xingli, Katharina Klingan, Malte Klingenhof, et al. "Morphology and mechanism of highly selective Cu(II) oxide nanosheet catalysts for carbon dioxide electroreduction." Nature Communications 12, no. 1 (2021). http://dx.doi.org/10.1038/s41467-021-20961-7.

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AbstractCu oxides catalyze the electrochemical carbon dioxide reduction reaction (CO2RR) to hydrocarbons and oxygenates with favorable selectivity. Among them, the shape-controlled Cu oxide cubes have been most widely studied. In contrast, we report on novel 2-dimensional (2D) Cu(II) oxide nanosheet (CuO NS) catalysts with high C2+ products, selectivities (> 400 mA cm−2) in gas diffusion electrodes (GDE) at industrially relevant currents and neutral pH. Under applied bias, the (001)-orientated CuO NS slowly evolve into highly branched, metallic Cu0 dendrites that appear as a general dominan
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Guo, Hele, Zhongyuan Guo, Kaibin Chu, et al. "Polymer‐Confined Pyrolysis Promotes the Formation of Ultrafine Single‐Phase High‐Entropy Alloys: A Promising Electrocatalyst for Oxidation of Nitrogen." Advanced Functional Materials, September 8, 2023. http://dx.doi.org/10.1002/adfm.202308229.

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AbstractHigh‐entropy alloys (HEAs) made up of multiple metallic elements have gained attention for their excellent electrocatalytic performance. However, their application in the field of nitrogen (N2) oxidation reaction (NOR) remains underexplored. In this study, a “pomegranate‐like” carbon embedded with ultrafine AuPdPtRhIr HEA (HEA@C) is synthesized using a polymer‐confined pyrolysis strategy. Molecular dynamics (MD) simulations show that small‐sized metal nanoparticles formed by the confinement of polyvinyl alcohol (PVA) during the hydrothermal process can easily form a single‐phase HEA th
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Yu, Li‐Hong, Xue‐Feng Zhang, Zi‐Ming Ye, et al. "Engineering p‐Orbital States via Molecular Modules in All‐Organic Electrocatalysts toward Direct Water Oxidation." Advanced Science, December 11, 2024. https://doi.org/10.1002/advs.202410507.

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AbstractOxygen evolution reaction (OER) is an indispensable anode reaction for sustainable hydrogen production from water electrolysis, yet overreliance on metal‐based catalysts featured with vibrant d‐electrons. It still has notable gap between metal‐free and metal‐based electrocatalysts, due to lacking accurate and efficient p‐band regulation methods on non‐metal atoms. Herein, a molecular modularization strategy is proposed for fine‐tuning the p‐orbital states of series metal‐free covalent organic frameworks (COFs) for realizing OER performance beyond benchmark precious metal catalysts. Opt
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Kocak, Tayfun, Langyuan Wu, Alper Ugur, et al. "Effect of doping amount on capacity retention and electrolyte decomposition of LiNi0.5Mn1.5O4-based cathode at high temperature." March 3, 2022. https://doi.org/10.1016/j.jssc.2022.123006.

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<em>Accepted </em><em>Manuscript version. The Published Journal Article is available on </em>Journal of Solid State Chemistry<em>, Volume 310, article number 123006 (DOI: </em><em>https://doi.org/10.1016/j.jssc.2022.123006</em><em>).</em> <em>Supplementary data available free of charge on the article webpage.</em> <em>&copy; 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license </em><em>https://creativecommons.org/licenses/by-nc-nd/4.0/</em>
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Kim, Suji, Hyun‐Soo Kim, Boran Kim, You‐Jin Kim, Ji‐Won Jung, and Won‐Hee Ryu. "In Situ Gas Analysis by Differential Electrochemical Mass Spectrometry for Advanced Rechargeable Batteries: A Review." Advanced Energy Materials, August 18, 2023. http://dx.doi.org/10.1002/aenm.202301983.

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AbstractLithium‐ion batteries (LIBs) and beyond‐LIB systems exhibit properties that are determined by electrochemical reactions occurring in their four essential components—the cathode, anode, electrolyte, and separator. Advanced analytical methods such as differential electrochemical mass spectrometry (DEMS) can assist in understanding the electrochemical behavior, which can help in advancing battery technologies. Recent studies have shown that the DEMS‐enabled real‐time gas analysis of electrochemical reactions can provide valuable information on aspects such as gaseous reactants or (side) p
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Nsabimana, Anaclet, Yiran Guan, and Guobao Xu. "In situ and operando characterization techniques for nanocatalyst-based electrochemical hydrogen evolution reactions." Journal of Electrochemical Science and Engineering, December 25, 2024, 2526. https://doi.org/10.5599/jese.2526.

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The hydrogen evolution reaction is important in energy conversion and storage. This has led to the design of different types of catalysts and production setups. Understanding the status of the catalysts and reaction mechanisms motivated researchers to adopt the operando/in situ techniques. Herein, we present a brief overview of the recent (from 2020) advances in the use of in situ and operando characterization techniques, such as in situ X-ray absorption spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction analysis, IR spectroscopy, electrochemical Raman spectroscopy, online induc
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36

Keikichi, Fujikawa. "A Review of Differential Electrochemical Mass Spectroscopy TechniqueⅠ.The principle and development of DEMS." Journal of Electrochemistry 2, no. 3 (1996). http://dx.doi.org/10.61558/2993-074x.1330.

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37

ZHOU, Yulin, Jing SUN, Sébastien GALLET, et al. "Nitrite electroreduction enhanced by hybrid compounds of Keggin polyoxometalates and 1‐butyl‐3‐vinylimidazolium." ChemCatChem, June 12, 2024. http://dx.doi.org/10.1002/cctc.202400226.

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We describe here an immobilization method of four Keggin‐type polyoxometalates (POMs) ([H2W12O40]6‐, [BW12O40]5‐ [SiW12O40]4‐, [PW12O40]3‐) by using the reaction with an ionic liquid, 1‐butyl‐3‐vinylimidazolium (BVIM) bromide. The reaction yields a hybrid material (BVIM‐POM) as a water‐insoluble salt. The chemical structure of both compounds is preserved, as indicated by infrared spectroscopy (FT‐IR), although with a reduced crystallinity (shown by X‐ray diffraction analysis) due to a decrease of water content (shown by thermogravimetric analysis). Cross polarization 1H‐31P NMR evidenced the p
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38

Ren, Xiangrong, Yiyue Zhai, Tao Gan, Na Yang, Bolun Wang, and Shengzhong (Frank) Liu. "Real‐Time Detection of Dynamic Restructuring in KNixFe1‐xF3 Perovskite Fluorides for Enhanced Water Oxidation." Small, December 20, 2024. https://doi.org/10.1002/smll.202411017.

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AbstractMechanistic understanding of how electrode–electrolyte interfaces evolve dynamically is crucial for advancing water‐electrolysis technology, especially the restructuring of catalyst surface during complex electrocatalytic reactions. However, for perovskite fluorides, the mechanistic exploration for the influence of the dynamic restructuring on their chemical property and catalytic mechanism is unclear due to their poor conductivity that makes the definition of electrocatalyst structure difficult. Herein, for oxygen evolution reaction (OER), various operando characterizations are employ
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39

Castañeda-Morales, Eleazar, Fabio A. Gómez-Gómez, Yueyin Li, and Arturo Manzo-Robledo. "Insights in Pt-based electrocatalysts on carbon supports for electro-oxidation of carbohydrates: an EIS-DEMS analysis." Frontiers in Chemistry 12 (May 9, 2024). http://dx.doi.org/10.3389/fchem.2024.1383443.

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In this work, the electrochemical oxidation of carbohydrates (glucose, fructose, and sucrose) was induced at the interface of Pt-nanoparticles supported on different carbon-based materials as carbon vulcan (C) and carbon black (CB). It was found that the support plays an important role during carbohydrates electro-oxidation as demonstrated by electrochemical techniques. In this context, current-concentration profiles of the redox peaks show the behavior of the pathways at carbohydrates-based solutions. Herein, the trend of current measured was glucose &amp;gt; sucrose &amp;gt; fructose, attrib
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40

Pang, Long, Zhiwei Zhao, Xian-Yin Ma, et al. "Hyphenated DEMS and ATR-SEIRAS techniques for in situ multidimensional analysis of lithium-ion batteries and beyond." Journal of Chemical Physics 158, no. 17 (2023). http://dx.doi.org/10.1063/5.0144635.

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A wide spectrum of state-of-the-art characterization techniques have been devised to monitor the electrode–electrolyte interface that dictates the performance of electrochemical devices. However, coupling multiple characterization techniques to realize in situ multidimensional analysis of electrochemical interfaces remains a challenge. Herein, we presented a hyphenated differential electrochemical mass spectrometry and attenuated total reflection surface enhanced infrared absorption spectroscopy analytical method via a specially designed electrochemical cell that enables a simultaneous detecti
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Chen, Teng, Shen Xu, Taotao Zhao, et al. "Accelerating Ethanol Complete Electrooxidation via Introducing Ethylene as the Precursor for the C−C Bond Splitting." Angewandte Chemie International Edition, August 7, 2023. http://dx.doi.org/10.1002/anie.202308057.

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The crucial issue restricting the application of direct ethanol fuel cells (DEFCs) is the incomplete and sluggish electrooxidation of ethanol due to the chemically stable C‐C bond thereof. Herein, a unique ethylene‐mediated pathway with a 100% C1‐selectivity for ethanol oxidation reaction (EOR) is proposed for the first time based on a well‐structured Pt/Al2O3@TiAl catalyst with cascade active sites. The electrochemical in situ Fourier transform infrared spectroscopy (FTIR) and differential electrochemical mass spectrometry (DEMS) analysis disclose that ethanol is primarily dehydrated on the s
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42

Chen, Teng, Shen Xu, Taotao Zhao, et al. "Accelerating Ethanol Complete Electrooxidation via Introducing Ethylene as the Precursor for the C−C Bond Splitting." Angewandte Chemie, August 7, 2023. http://dx.doi.org/10.1002/ange.202308057.

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The crucial issue restricting the application of direct ethanol fuel cells (DEFCs) is the incomplete and sluggish electrooxidation of ethanol due to the chemically stable C‐C bond thereof. Herein, a unique ethylene‐mediated pathway with a 100% C1‐selectivity for ethanol oxidation reaction (EOR) is proposed for the first time based on a well‐structured Pt/Al2O3@TiAl catalyst with cascade active sites. The electrochemical in situ Fourier transform infrared spectroscopy (FTIR) and differential electrochemical mass spectrometry (DEMS) analysis disclose that ethanol is primarily dehydrated on the s
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43

Engstfeld, Albert Kilian, Lukas Forschner, Mario Löw, et al. "Stabilization of Ru‐Core Pt‐Shell Model Electrodes by Electronic Effects and Electrooxidation Reactions." ChemCatChem, March 9, 2025. https://doi.org/10.1002/cctc.202401913.

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The technical application of bimetallic core‐shell particles, depends crucially on their long‐term stability under operating conditions. In the present multi‐method study, we explored the stability of structurally well‐defined Ru‐core Pt‐shell model systems during the CO oxidation (COOR) and methanol oxidation (MOR) reactions. These electrodes consist of a single‐crystalline Ru(0001) substrate covered by epitaxial Pt films of one to three atomic layers. The reaction‐induced modifications in the surface morphology were identified by scanning tunnelling microscopy (STM) measurements performed be
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44

Zhanadilov, Orynbay, Sourav Baiju, Natalia Voronina, et al. "Impact of Transition Metal Layer Vacancy on the Structure and Performance of P2 Type Layered Sodium Cathode Material." Nano-Micro Letters 16, no. 1 (2024). http://dx.doi.org/10.1007/s40820-024-01439-9.

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AbstractThis study explores the impact of introducing vacancy in the transition metal layer of rationally designed Na0.6[Ni0.3Ru0.3Mn0.4]O2 (NRM) cathode material. The incorporation of Ru, Ni, and vacancy enhances the structural stability during extensive cycling, increases the operation voltage, and induces a capacity increase while also activating oxygen redox, respectively, in Na0.7[Ni0.2VNi0.1Ru0.3Mn0.4]O2 (V-NRM) compound. Various analytical techniques including transmission electron microscopy, X-ray absorption near edge spectroscopy, operando X-ray diffraction, and operando differential
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45

Zhan, Xiaoyi, Fenwei Cui, Yunhong Luo, et al. "A Room‐Temperature All‐Solid‐State Na‐Ag Battery with a Long Cycle Life and Low Overpotential." ChemSusChem, July 23, 2024. http://dx.doi.org/10.1002/cssc.202401184.

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Aqueous Zn‐Ag batteries have been developed and commercialized for nearly a century, offering stable discharge and high specific energies. Sodium, with its lower redox potential, smaller charge‐to‐mass ratio, and abundant resources, presents a promising alternative to zinc. In this study, we successfully developed an all‐solid‐state Na‐Ag battery system. This battery demonstrates stable discharge and charge voltages, low overpotential (0.27 V), high energy efficiency (&gt;91%), and long cycle life under moderate humidity at room temperature. The reaction mechanism was elucidated through combin
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Homlamai, Kan, Thitiphum Sangsanit, Ronnachai Songthan, Worapol Tejangkura, and Montree Sawangphruk. "Fluorinated Electrolytes for High‐Energy Ni‐rich NCA90 Lithium‐Ion Batteries at a Cylindrical Cell Configuration: A Deep Dive into Decomposition Pathways." ChemSusChem, March 12, 2025. https://doi.org/10.1002/cssc.202500238.

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This study investigates the electrochemical performance, stability, and decomposition mechanisms of fluorine‐based electrolytes in large‐scale cylindrical Ni‐rich lithium‐ion batteries (LIBs) under high‐voltage conditions (up to 4.8 V). We examine fluoroethylene carbonate (FEC) and di‐fluoroethylene carbonate (DFEC) in electrolyte formulations and their effects on battery longevity, gas evolution, and solvation dynamics. While FEC is known for improving the solid electrolyte interphase (SEI), DFEC remains underexplored. Using molecular dynamics (MD) simulations, density functional theory (DFT)
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Huang, Yixuan, Yufeng Qin, Qingqing Ye, Jiahao Wang, Meiling Dou, and Feng Wang. "Constructing Asymmetric Ir‐O‐Ru Unit to Promote Rapid Deprotonation and Stable Lattice Oxygen in PbIrRu Pyrochlores for Water Oxidation." Advanced Energy Materials, July 2, 2025. https://doi.org/10.1002/aenm.202501860.

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AbstractExploring efficient and durable low‐iridium (Ir) catalysts for the oxygen evolution reaction (OER) is crucial for the commercialization of proton exchange membrane water electrolysis (PEMWE). Herein, asymmetric Ir‐O‐Ru active units are constructed in PbIrRu pyrochlore (Pb2(IrRu)2O7−δ) by incorporating ruthenium (Ru) sites into PbIr pyrochlore through a scalable hydrothermal strategy. Soft X‐ray absorption spectroscopy, operando characterizations, and DFT calculations reveal that the Ir‐O‐Ru units promote rapid deprotonation of oxo‐intermediates (*OH→*O) for enhancing OER kinetics by mo
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48

Yang, Zhichao, Yutian Ding, Wen Chen, et al. "Phase‐Engineered Bi‐RuO2 Single‐Atom Alloy Oxide Boosting Oxygen Evolution Electrocatalysis in Proton Exchange Membrane Water Electrolyzer." Advanced Materials, January 16, 2025. https://doi.org/10.1002/adma.202417777.

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AbstractEngineering nanomaterials at single‐atomic sites can enable unprecedented catalytic properties for broad applications, yet it remains challenging to do so on RuO2‐based electrocatalysts for proton exchange membrane water electrolyzer (PEMWE). Herein, the rational design and construction of Bi‐RuO2 single‐atom alloy oxide (SAAO) are presented to boost acidic oxygen evolution reaction (OER), via phase engineering a novel hexagonal close packed (hcp) RuBi single‐atom alloy. This Bi‐RuO2 SAAO electrocatalyst exhibits a low overpotential of 192 mV and superb stability over 650 h at 10 mA cm
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Matamala-Troncoso, Felipe, Sergio Díaz Coello, Francisco Martínez, et al. "First Approach of Fractals Nickel-Copper Dendrites on Stainless Steel Electrodes for Ammonia Oxidation to Nitrogen Monitored In Operando by Differential Electrochemical Mass Spectroscopy." Electrochimica Acta, August 2024, 144894. http://dx.doi.org/10.1016/j.electacta.2024.144894.

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50

Zhu, Zhonghuan, Yimin Jiang, Leitao Xu та ін. "Highly Efficient Synthesis of α‐Amino Acids via Electrocatalytic C‐N Coupling Reaction Over an Atomically Dispersed Iron Loaded Defective TiO2". Advanced Materials, 12 грудня 2024. https://doi.org/10.1002/adma.202409864.

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AbstractThe synthesis of α‐amino acids via the electrocatalytic C‐N coupling attracted extensive attention owing to the mild reaction conditions, controllable reaction parameters, and atom economy. However, the α‐amino acid yield remains unsatisfying. Herein, the efficient electrocatalytic synthesis of α‐amino acids is achieved with an atomically dispersed Fe loaded defective TiO2 monolithic electrocatalyst (adFe‐TiOx/Ti). The desired electrocatalyst composition for the hydrogenation of oxime is screened. The prepared adFe‐TiOx/Ti exhibited a high glyoxylic acid conversion of ≈100% and a glyci
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