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Dynamic Activation of Adsorbed Intermediates via Axial Traction for the Promoted Electrochemical CO 2 Reduction
Author(s) -
Wang Xinyue,
Wang Yu,
Sang Xiahan,
Zheng Wanzhen,
Zhang Shihan,
Shuai Ling,
Yang Bin,
Li Zhongjian,
Chen Jianmeng,
Lei Lecheng,
Adli Nadia Mohd,
Leung Michael K. H.,
Qiu Ming,
Wu Gang,
Hou Yang
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202013427
Subject(s) - moiety , electrochemistry , electrocatalyst , chemistry , oxygen , metal , nickel , adsorption , atom (system on chip) , materials science , stereochemistry , electrode , organic chemistry , computer science , embedded system
Regulating the local environment and structure of metal center coordinated by nitrogen ligands (M‐N 4 ) to accelerate overall reaction dynamics of the electrochemical CO 2 reduction reaction (CO 2 RR) has attracted extensive attention. Herein, we develop an axial traction strategy to optimize the electronic structure of the M‐N 4 moiety and construct atomically dispersed nickel sites coordinated with four nitrogen atoms and one axial oxygen atom, which are embedded within the carbon matrix (Ni‐N 4 ‐O/C). The Ni‐N 4 ‐O/C electrocatalyst exhibited excellent CO 2 RR performance with a maximum CO Faradic efficiency (FE) close to 100 % at −0.9 V. The CO FE could be maintained above 90 % in a wide range of potential window from −0.5 to −1.1 V. The superior CO 2 RR activity is due to the Ni‐N 4 ‐O active moiety composed of a Ni‐N 4 site with an additional oxygen atom that induces an axial traction effect.