3 years ago

Rational Design of Single Mo Atoms Anchored on N-doped Carbon for Effective Hydrogen Evolution Reaction

Yu Wang, Qing Peng, Lirong Zheng, Chen Chen, Weng-Chon Cheong, Jiawei Wan, Chunting He, Xusheng Zheng, Juncai Dong, Hanlin Ren, Yadong Li, Zhongbin Zhuang, Shubo Tian, Jiajing Pei, Dingsheng Wang, Youqi Zhu, Wensheng Yan, Siqi Lu, Wenxing Chen
Highly efficient electrochemical hydrogen evolution reaction (HER) provides a promising pathway to resolve energy and environment problems. Herein, we designed an electrocatalyst with single Mo atoms (Mo-SAs) supported on N-doped carbon with outstanding HER performance. The structure of the catalyst was probed by aberration-corrected scanning transmission electron microscopy (AC-STEM) and X-ray absorption fine structure (XAFS) spectroscopy, indicating the formation of Mo-SAs anchored with one nitrogen atom and two carbon atoms (Mo1N1C2). Importantly, the Mo1N1C2 catalyst displayed much more excellent activity compared with Mo2C and MoN, and better stability than commercial Pt/C. Density functional theory (DFT) calculation revealed that the unique structure of Mo1N1C2 moiety played a crucial effect to improve the HER performance. This work opens up new opportunities for the preparation and application of highly active and stable Mo-based HER catalysts.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201710599

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