Two Pathways for the Formation of Ethylene in CO Reduction on Single-Crystal Copper Electrodes

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• 作者：Klaas Jan P. Schouten ; Zisheng Qin ; Elena P茅rez Gallent ; Marc T. M. Koper
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：June 20, 2012
• 年：2012
• 卷：134
• 期：24
• 页码：9864-9867
• 全文大小：261K
• 年卷期：v.134,no.24(June 20, 2012)
• ISSN：1520-5126

文摘

Carbon monoxide is a key intermediate in the electrochemical reduction of carbon dioxide to methane and ethylene on copper electrodes. We investigated the electrochemical reduction of CO on two single-crystal copper electrodes and observed two different reaction mechanisms for ethylene formation: one pathway has a common intermediate with the formation of methane and takes place preferentially at (111) facets or steps, and the other pathway involves selective reduction of CO to ethylene at relatively low overpotentials at (100) facets. The (100) facets seem to be the dominant crystal facets in polycrystalline copper, opening up new routes to affordable (photo)electrochemical production of hydrocarbons from CO<sub>2sub>.