电催化剂
催化作用
法拉第效率
电化学
化学
吉布斯自由能
氧化还原
碳纤维
电子转移
无机化学
氮气
材料科学
物理化学
电极
热力学
物理
复合数
复合材料
有机化学
生物化学
作者
Yan Li,Junwei Li,Jianfeng Huang,Junxiang Chen,Yan Kong,Bin Yang,Zhongjian Li,Lecheng Lei,Guoliang Chai,Zhenhai Wen,Liming Dai,Yang Hou
标识
DOI:10.1002/anie.202100526
摘要
Abstract Electrocatalytic nitrogen reduction reaction (NRR) plays a vital role for next‐generation electrochemical energy conversion technologies. However, the NRR kinetics is still limited by the sluggish hydrogenation process on noble‐metal‐free electrocatalyst. Herein, we report the rational design and synthesis of a hybrid catalyst with atomic iron sites anchored on a N,O‐doped porous carbon (Fe SA ‐NO‐C) matrix of an inverse opal structure, leading to a remarkably high NH 3 yield rate of 31.9 μg h −1 mg −1 cat. and Faradaic efficiency of 11.8 % at −0.4 V for NRR electrocatalysis, outperformed almost all previously reported atomically dispersed metal‐nitrogen‐carbon catalysts. Theoretical calculations revealed that the observed high NRR catalytic activity for the Fe SA ‐NO‐C catalyst stemmed mainly from the optimized charge‐transfer between the adjacent O and Fe atoms homogenously distributed on the porous carbon support, which could not only significantly facilitate the transportation of N 2 and ions but also effectively decrease the binding energy between the isolated Fe atom and *N 2 intermediate and the thermodynamic Gibbs free energy of the rate‐determining step (*N 2 → *NNH).
科研通智能强力驱动
Strongly Powered by AbleSci AI