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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Size-Dependent Structural Alterations in Ag Nanoparticles during CO2 Electrolysis in a Gas-Fed Zero-Gap Electrolyzerстатья Исследовательская статья
- Авторы: Hu Huifang, Liu Menglong, Kong Ying, Zelocualtecatl Montiel Iván, Hou Yuhui, Rudnev Alexander V., Broekmann Peter
- Журнал: ChemElectroChem
- Том: 9
- Номер: 17
- Год издания: 2022
- Издательство: Wiley-VCH Verlag
- Местоположение издательства: Weinheim, Germany, Germany
- Номер статьи: e202200615
- DOI: 10.1002/celc.202200615
- Аннотация: Ag nanoparticles (NPs) are efficient electrocatalysts for electrochemical CO2-to-CO conversion. However, NPs are thermodynamically unstable and can undergo structural alterations under electrolysis operating conditions. These structural changes may play a crucial role in the deterioration of CO2 reduction reaction (CO2RR) performance on the long-term electrolysis time scale. Here, we studied the effect of NP size on NP degradation during CO2RR. Polyvinylpyrrolidone-capped 10, 40, and 100 nm Ag NPs deposited on a gas diffusion electrode were used as testbed catalysts in a gas-fed zero-gap electrolyzer. Inductively coupled plasma mass spectrometry indicated insignificant catalyst-material detachment after galvanostatic CO2 electrolysis. Scanning electron microscopy analysis showed that smaller NPs tended to agglomerate during CO2 electrolysis. 100 nm NPs formed agglomerates consisting of only two-three NPs and underwent pronounced fragmentation with the formation of particles several nanometers in size. The fragmentation was associated with cathodic corrosion of Ag NPs under conditions of intensive CO2RR and hydrogen evolution.
- Добавил в систему: Руднев Александр Викторович