阳极氧化
电化学
氧化物
铜
电极
产量(工程)
金属
无机化学
法拉第效率
氧化铜
材料科学
选择性
化学
电解质
化学工程
催化作用
冶金
物理化学
有机化学
铝
工程类
作者
Minh Le,Maoming Ren,Ziyu Zhang,P. T. Sprunger,Richard L. Kurtz,John Flake
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2011-01-01
卷期号:158 (5): E45-E45
被引量:423
摘要
The direct reduction of CO2 to CH3OH is known to occur at several types of electrocatalysts including oxidized Cu electrodes. In this work, we examine the yield behavior of an electrodeposited cuprous oxide thin film and explore relationships between surface chemistry and reaction behavior relative to air-oxidized and anodized Cu electrodes. CH3OH yields (43 μmol cm−2 h−1) and Faradaic efficiencies (38%) observed at cuprous oxide electrodes were remarkably higher than air-oxidized or anodized Cu electrodes suggesting Cu(I) species may play a critical role in selectivity to CH3OH. Experimental results also show CH3OH yields are dynamic and the copper oxides are reduced to metallic Cu in a simultaneous process. Yield behavior is discussed in comparison with photoelectrochemical and hydrogenation reactions where the improved stability of Cu(I) species may allow continuous CH3OH generation.
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