Highly dispersed, single-site copper catalysts for the electroreduction of CO2 to methane

被引：37

作者：

Zhang, Teng ^{[1
]}

Verma, Sumit ^{[2
,3
]}

Kim, Soojeong ^{[4
]}

Fister, Tim T. ^{[4
]}

Kenis, Paul J. A. ^{[2
,3
]}

Gewirth, Andrew A. ^{[1
,3
]}

机构：

[1] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

[2] Univ Illinois, Dept Chem & Biomol Engn, Urbana, IL 61801 USA

[3] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Fukuoka, Japan

[4] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2020年 / 875卷 / 875期

基金：

美国国家科学基金会;

关键词：

CO2; electroreduction; Single-site catalysts; Copper; Methane; CARBON-DIOXIDE REDUCTION; SELECTIVE ELECTROCHEMICAL REDUCTION; AQUEOUS CO2; ETHYLENE; HYDROCARBONS; NANOPARTICLES; CRYSTAL; ELECTRODES; CONVERSION; ETHANOL;

D O I：

10.1016/j.jelechem.2020.113862

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Pyrolyzing Cu(II) precursors absorbed on carbon black gave an eletrocatalytic material for the electroreduction of CO2. Controlled potential electrolysis and GC analysis revealed an unexpected selectivity towards methane even in alkaline media, with a methane Faradaic efficiency as high as 42%, a partial current density of 100 mA/cm(2) (at -1 V vs. RHE) and a methane/ethylene ratio of 4:1. XPS, EXAFS, and EDX mapping results indicate a single-site Cu(I) center as the catalytically active site. The limited size of the active sites is believed to be crucial for the preferential formation of methane over ethylene.

引用

页数：6

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