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Advances in Understanding Mechanisms of Perovskites and Pyrochlores as Electrocatalysts using In‐Situ X‐ray Absorption Spectroscopy
Author(s) -
Park Joohyuk,
Cho Jaephil
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202000768
Subject(s) - x ray absorption spectroscopy , pyrochlore , bifunctional , electrocatalyst , catalysis , materials science , perovskite (structure) , absorption spectroscopy , spectroscopy , absorption (acoustics) , electrochemistry , xanes , nanotechnology , inorganic chemistry , chemistry , electrode , crystallography , biochemistry , phase (matter) , physics , organic chemistry , quantum mechanics , composite material
Metal oxides are some of the most promising candidates as electrocatalysts for electrical‐energy‐storage (EES) systems. Particularly, perovskite and pyrochlore oxides have been intensively investigated as bifunctional electrocatalysts because of their superior catalytic activities during the oxygen‐reduction and ‐evolution reactions. However, the origin of the outstanding catalytic activities and structural changes of the materials are not clear, in part due to the difficulty in identification during electrocatalysis. In this Minireview, we present a critical overview of recent progress in understanding catalytic mechanisms of perovskite and pyrochlore oxides, highlighting the innovative in‐situ X‐ray absorption spectroscopy (XAS) analysis for electrochemical tests.