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A Strategy to Promote the Electrocatalytic Activity of Spinels for Oxygen Reduction by Structure Reversal
Author(s) -
Wu Guangping,
Wang Jun,
Ding Wei,
Nie Yao,
Li Li,
Qi Xueqiang,
Chen Siguo,
Wei Zidong
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201508809
Subject(s) - spinel , chemistry , octahedron , oxygen , metal , oxidation state , inorganic chemistry , crystal structure , catalysis , oxygen reduction reaction , crystallography , electrochemistry , materials science , electrode , metallurgy , organic chemistry
The electrocatalytic performance of a spinel for the oxygen reduction reaction (ORR) can be significantly promoted by reversing its crystalline structure from the normal to the inverse. As the spinel structure reversed, the activation and cleavage of O−O bonds are accelerated owing to a dissimilarity effect of the distinct metal atoms co‐occupying octahedral sites. The Co II Fe III Co III O 4 spinel with the Fe and Co co‐occupying inverse structure exhibits an excellent ORR activity, which even exceeds that of the state‐of‐the‐art commercial Pt/C by 42 mV in alkaline medium.