Enhanced selectivity and activity for electrocatalytic reduction of CO2 to CO on an anodized Zn/carbon/Ag electrode

被引：25
|
作者：
Gao, Yugang [1 ]
Li, Fengping [2 ]
Zhou, Peng [1 ]
Wang, Zeyan [1 ]
Zheng, Zhaoke [1 ]
Wang, Peng [1 ]
Liu, Yuanyuan [1 ]
Dai, Ying [2 ]
Whangbo, Myung-Hwan [1 ,3 ,4 ]
Huang, Baibiao [1 ]
机构：
[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China
[2] Shandong Univ, Sch Phys, Jinan 250100, Shandong, Peoples R China
[3] North Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
[4] Chinese Acad Sci, Fujian Inst Res Struct Matter FJIRSM, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2019年 / 7卷 / 28期
基金：
中国国家自然科学基金;
关键词：
HYDROGEN EVOLUTION; CARBON-DIOXIDE; ELECTROREDUCTION; AU; CONVERSION; EFFICIENT; CATALYSTS;
D O I：
10.1039/c9ta04529e
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We constructed a composite electrode by depositing a C/Ag mixture containing a tiny amount of 20 nm Ag NPs (similar to 0.5 wt%) on anodized Zn (AZ) metal. The AZ/C/Ag electrode exhibits greatly enhanced CO selectivity (similar to 86%) and activity (similar to 7.3 mA cm(-2)) on comparison with the GCE/C/Ag electrode (similar to 24% and similar to 2.3 mA cm(-2)). The experimental results show that the enhanced CO2 reduction performance of the AZ/C/Ag electrode is attributed to the synergistic effect of AZ, C and Ag. Density functional theory calculations indicate that the enhanced CO selectivity may originate from the enhanced stabilization of CO2 and COOH* on the AZ/C/Ag electrode surface. This electrode also shows great mass activity and stability for CO2 reduction. Our work provides a new and simple way to fabricate efficient catalysts with high selectivity, activity and stability for electrocatalytic CO2 reduction.
引用
收藏
页码：16685 / 16689
页数：5
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