过电位
石墨烯
电催化剂
氧烷
塔菲尔方程
密度泛函理论
催化作用
材料科学
戒指(化学)
化学
物理化学
纳米技术
计算化学
电化学
有机化学
谱线
天文
物理
电极
作者
Zhiyu Lin,Yang� Yang,Mengsi Li,Hao Huang,Wei Hu,Long Cheng,Wensheng Yan,Zhengkun Yu,Kaitian Mao,Guoliang Xia,Jian Lu,Peng Jiang,Yang Kang,Ruirui Zhang,Pengping Xu,Changlai Wang,Lin Hu,Qianwang Chen
标识
DOI:10.1002/anie.201908210
摘要
Abstract Graphene‐based materials still exhibit poor electrocatalytic activities for the hydrogen evolution reaction (HER) although they are considered to be the most promising electrocatalysts. We fabricated a graphene‐analogous material displaying exceptional activity towards the HER under acidic conditions with an overpotential (57 mV at 10 mA cm −2 ) and Tafel slope (44.6 mV dec −1 ) superior to previously reported graphene‐based materials, and even comparable to the state‐of‐the art Pt/C catalyst. X‐ray absorption near‐edge structure (XANES) and solid‐state NMR studies reveal that the distinct feature of its structure is dual graphitic‐N doping in a six‐membered carbon ring. Density functional theory (DFT) calculations show that the unique doped structure is beneficial for the activation of C−H bonds and to make the carbon atom bonded to two graphitic N atoms an active site for the HER.
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