image: Electrochemical CO2 reduction to value-added fuels via solid oxide electrolysis cell (SOEC) is a promising strategy in converting CO2 and surplus sustainable electricity to chemical energies. This work reported a mechanical milling approach to prepare the highly dispersed nickel species with low loading on perovskite. When employed as cathode for SOEC, it can alter its electronic structure and facilitate the oxygen vacancy formation, thus greatly promote the CO2 electrolysis. view more
Credit: Chinese Journal of Catalysis
Electrochemical CO2 reduction to value-added fuels via solid oxide electrolysis cell (SOEC) is a promising strategy to realize the anthropogenic carbon cycle sustainability. Up to date, numerous perovskite oxides have been explored as attractive cathodes for the CO2 electrolysis, however, further enhancement of their catalytic activity are urgently needed to meet the requirement of practical applications. Maximizing the number of catalytically active sites and enhancing the electron-ion conductivities of perovskite oxides via a facial protocol is essential to promote the CO2 electrolysis performance.
Recently, a research team led by Prof. Guoxiong Wang from Dalian Institute of Chemical Physics, Chinese Academy of Sciences, proposed a facial mechanical milling approach to design a cathode via loading highly dispersed nickel species with low content on the iron-based perovskite for the high-temperature CO2 electrolysis in SOEC. The highly dispersed Ni species can provide extra electron-hopping paths and favor the oxygen vacancies formation without affecting its porous microstructures, thus facilitating the electrode kinetics and greatly enhancing the CO2 electrolysis performance. The lowest polarization resistance of 0.076 Ω cm2, and the highest current density of 1.53 A cm-2 could be achieved at 800 oC and 1.6 V, which is about 91% higher than the iron-based perovskite counterpart. This work offers a new feasible avenue to design efficient cathode via incorporating highly dispersed transition metal species for SOEC. The results were published in Chinese Journal of Catalysis (https://doi.org/10.1016/S1872-2067(21)63960-8).
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About the Journal
Chinese Journal of Catalysis is co-sponsored by Dalian Institute of Chemical Physics, Chinese Academy of Sciences and Chinese Chemical Society, and it is currently published by Elsevier group. This monthly journal publishes in English timely contributions of original and rigorously reviewed manuscripts covering all areas of catalysis. The journal publishes Reviews, Accounts, Communications, Articles, Highlights, Perspectives, and Viewpoints of highly scientific values that help understanding and defining of new concepts in both fundamental issues and practical applications of catalysis. Chinese Journal of Catalysis ranks among the top two journals in Applied Chemistry with a current SCI impact factor of 12.92. The Editors-in-Chief are Profs. Can Li and Tao Zhang.
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