Robust wrinkled MoS 2 /N-C bifunctional electrocatalysts interfaced with single Fe atoms for wearable zinc-air batteries

Proceedings of the National Academy of Sciences of the United States of America - Tập 118 Số 40 - 2021
Yan Yan1,2, Shuang Liang2, Xiang Wang3, Shouxin Zhang2, Shu‐Meng Hao2, Xun Cui2, Zhiwei Li4, Zhiqun Lin2
1School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China
2School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332;
3Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
4Shenzhen Cloud Computing Center, National Supercomputing Center, Shenzhen 518055, China

Tóm tắt

Significance Single-atom catalysis involves precise modulation of structures at the atomic level to markedly enhance catalytic activity. This work explores wrinkled MoS 2 @Fe- N -C core/shell nanospheres with atomic Fe-doped surface and interface (MoS 2 /Fe- N -C) as highly efficient bifunctional catalysts for both oxygen reduction and evolution reactions (ORR and OER), rivaling the ORR and OER activity of Pt/C and Ir/C, respectively. The robust performance can be attributed to the unique MoS 2 /Fe- N -C interface, at which the highly active Fe-N 4 moieties coupled with the grain boundary of MoS 2 simultaneously reduce the energy barriers of ORR and OER. Notably, the Fe-N-C shell protects the MoS 2 core from corrosion during the ORR and OER processes in the alkaline electrolyte, leading to a long-term stability for the as-constructed zinc-air batteries.

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Proceedings of the National Academy of Sciences of the United States of America

Tập 118 Số 40

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