甲烷化
电催化剂
离解(化学)
法拉第效率
氢
氮气
化学
催化作用
无机化学
Atom(片上系统)
材料科学
物理化学
电极
有机化学
电化学
生物化学
嵌入式系统
计算机科学
作者
Anxiang Guan,Yalei Fan,Shibo Xi,Haoliang Huang,Quan Zhang,Naixin Lyu,Bowen Wu,Yangshen Chen,Zhengzheng Liu,Chao Yang,Yali Ji,Miao Kan,Linjuan Zhang,Gengfeng Zheng
出处
期刊:ACS materials letters
[American Chemical Society]
日期:2022-11-28
卷期号:5 (1): 19-26
被引量:7
标识
DOI:10.1021/acsmaterialslett.2c01023
摘要
Cu single-atom catalysts are considered as efficient candidates to boost the electrocatalytic CO2 reduction to CH4, but the source of *H species for the CH4 formation during the multiple electron–proton transfer process is still elusive. Herein, we reported a facile strategy for the large-scale preparation of Cu single-atom catalysts via a solid-state pyrolysis strategy, with a Cu content of 3.86 wt %. The Cu single atoms were coordinated by four nitrogen atoms, which allowed to accelerate water dissociation to form *H species and stabilize key intermediates toward CH4. The Cu single-atom catalyst exhibited an excellent CO2-to-CH4 electroreduction performance, including a Faradaic efficiency of 68.2%, a high partial current density of 493.1 mA cm–2, and a good electrochemical stability. This work suggests a potential means of the mass production of Cu single-atom catalysts, with understanding of the mechanism of the CO2 electroreduction to CH4.
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