X射线吸收精细结构
催化作用
电催化剂
密度泛函理论
钼
扫描透射电子显微镜
部分
材料科学
电化学
吸收光谱法
氢
合理设计
碳纤维
化学
光谱学
物理化学
纳米技术
透射电子显微镜
无机化学
计算化学
立体化学
有机化学
复合数
电极
复合材料
物理
量子力学
作者
Wenxing Chen,Jiajing Pei,Chun‐Ting He,Jiawei Wan,Hanlin Ren,Youqi Zhu,Yu Wang,Juncai Dong,Shubo Tian,Weng‐Chon Cheong,Siqi Lu,Lirong Zheng,Xusheng Zheng,Wensheng Yan,Zhongbin Zhuang,Chen Chen,Qing Peng,Dingsheng Wang,Yadong Li
标识
DOI:10.1002/anie.201710599
摘要
Abstract The highly efficient electrochemical hydrogen evolution reaction (HER) provides a promising pathway to resolve energy and environment problems. An electrocatalyst was designed with single Mo atoms (Mo‐SAs) supported on N‐doped carbon having 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 (Mo 1 N 1 C 2 ). Importantly, the Mo 1 N 1 C 2 catalyst displayed much more excellent activity compared with Mo 2 C and MoN, and better stability than commercial Pt/C. Density functional theory (DFT) calculation revealed that the unique structure of Mo 1 N 1 C 2 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.
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