Revising the role of chromium on the surface of perovskite electrodes: Poison or promoter for the solid oxide electrolysis cell performance?

Dingkai Chen,Basma Mewafy,Fotios Paloukis,Liping Zhong,Vasiliki Papaefthimiou,Thierry Dintzer,Kalliopi M. Papazisi,Stella P. Balomenou,Dimitrios Tsiplakides,Detre Teschner,Virginia Pérez-Dieste,Carlos Escudero,Spyridon Zafeiratos

Journal of Catalysis（2020）

引用 11|浏览23

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摘要

•Steam electrolysis over LSCrF perovskite electrodes is examined by operando methods.•The surface state of LSCrF is directly associated with the electrocatalytic performance.•In steam electrolysis Sr and Cr diffuse on the surface to form a SrCrO4-like oxide.•Formation of surface chromites is beneficial for the steam electrolysis performance.

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关键词

Solid oxide electrochemical cells,Steam electrolysis,Perovskite electrodes,Exsolution,Near ambient pressure XPS,Hydrogen production,Deactivation

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