电催化剂
催化作用
法拉第效率
选择性
可逆氢电极
电化学
无机化学
硫黄
热解
化学
材料科学
化学工程
电极
物理化学
工作电极
有机化学
冶金
工程类
作者
Song Lu,Yang Zhang,Mohamed F. Mady,Obinna Egwu Eleri,Wakshum Mekonnen Tucho,Michal Mazur,Ang Li,Fengliu Lou,Minfen Gu,Zhixin Yu
出处
期刊:Chemsuschem
[Wiley]
日期:2022-08-05
卷期号:15 (19)
被引量:15
标识
DOI:10.1002/cssc.202200870
摘要
Developing highly efficient electrocatalysts for electrochemical CO2 reduction (ECR) to value-added products is important for CO2 conversion and utilization technologies. In this work, a sulfur-doped Ni-N-C catalyst is fabricated through a facile ion-adsorption and pyrolysis treatment. The resulting Ni-NS-C catalyst exhibits higher activity in ECR to CO than S-free Ni-N-C, yielding a current density of 20.5 mA cm-2 under -0.80 V versus a reversible hydrogen electrode (vs. RHE) and a maximum CO faradaic efficiency of nearly 100 %. It also displays excellent stability with negligible activity decay after electrocatalysis for 19 h. A combination of experimental investigations and DFT calculations demonstrates that the high activity and selectivity of ECR to CO is due to a synergistic effect of the S and Ni-NX moieties. This work provides insights for the design and synthesis of nonmetal atom-decorated M-N-C-based ECR electrocatalysts.
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