Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 4, Pages 1340-1344Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201508809
Keywords
dissimilarity effect; electrocatalysis; inverse spinels; oxygen reduction reaction
Categories
Funding
- China National 973 Program [2012CB215500, 2012CB720300]
- NSFC of China [91534205, 21436003, 21573029, 21576032]
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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 (CoFeCoO4)-Fe-II-Co-III-O-III 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.
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