催化作用
法拉第效率
密度泛函理论
X射线光电子能谱
硼
材料科学
吸附
电化学
化学工程
可逆氢电极
碳纤维
无机化学
电极
化学
物理化学
计算化学
工作电极
工程类
复合材料
复合数
有机化学
生物化学
作者
Zhiqian Li,Xiao-Feng Yang,Fugang Qi,Tao Cheng,Zining Zhang,Hongjuan Zhang,Jing Tang
标识
DOI:10.1016/j.apsusc.2023.158919
摘要
The development for electroreduction of carbon dioxide (CO2) is crucial for achieving sustainable cycles and carbon neutrality. Electroreduction of CO2 to C2+ products not only mitigate environmental issues by reducing CO2 but also provide high-value chemicals for modern industry. In this study, we synthesized CuO nanosheets (CuO NS) via simple hydrothermal method and modified its electron structure by in-situ boron (B) doping to produce B-CuO NS catalyst. The XPS spectra revealed the successfully doping of B into CuO NS, which obviously changing the electron density of Cu on the surface CuO NS. As a result, B-CuO NS displayed a higher performance for electroreduction of CO2 compared with original CuO NS. The optimized B-CuO NS catalyst exhibits a Faradaic efficiency of 54.78 % for C2+ production at −1.2 V vs. reversible hydrogen electrode (RHE). Based on the structural characterization and Density Functional Theory (DFT) calculations, the introduction of B increases the charge density of Cu, which could process free electrons to adsorb *CO. Thanks to the easier adsorbing of *CO on B-CuO NS as well as the lower adsorption energy of *CO on Cu, C–C coupling reaction was promoted to produce more C2+ products. This work shows a rational design strategy for developing efficient catalysts for electroreduction of CO2.
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