A Strategy to Promote the Electrocatalytic Activity of Spinels for Oxygen Reduction by Structure Reversal |
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| Authors: | Dr Guangping Wu Dr Jun Wang Dr Wei Ding Dr Yao Nie Prof Li Li Dr Xueqiang Qi Dr Siguo Chen Prof Zidong Wei |
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| Affiliation: | Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China |
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| Abstract: | 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 CoIIFeIIICoIIIO4 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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| Keywords: | dissimilarity effect electrocatalysis inverse spinels oxygen reduction reaction |
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