Selective Electrochemical Reduction of CO2 to Ethylene on Nanopores-Modified Copper Electrodes in Aqueous Solution,ACS Applied Materials & Interfaces

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Selective Electrochemical Reduction of CO2 to Ethylene on Nanopores-Modified Copper Electrodes in Aqueous Solution
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-09-15 00:00:00 , DOI: 10.1021/acsami.7b10421
Yuecheng Peng ₁ , Tian Wu ₂ , Libo Sun ₁ , Jean M. V. Nsanzimana ₁ , Adrian C. Fisher ₃ , Xin Wang _{1,

3}

Affiliation

Electrochemical reduction of carbon dioxide was carried out on copper foil electrodes modified with nanopores on the surface. Such nanopores modified structure was obtained through an alloying–dealloying process. Scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy confirmed the formation of alloy layer and the final nanoporous morphology of such copper electrodes. When used in electrolysis process, the as-prepared nanopores-modified electrodes can suppress the Faradaic efficiency toward methane to less than 1%, while keeping that of ethylene in a high level of 35% in aqueous 0.1 M KHCO₃ solution under −1.3 V (vs reversible hydrogen electrode), thus revealing a remarkable selectivity toward ethylene production. The high yield of ethylene can be ascribed to the exposed specific crystalline orientations.

中文翻译：

纳米孔修饰的铜电极在水溶液中将CO ₂选择性电化学还原为乙烯

在表面经纳米孔修饰的铜箔电极上进行二氧化碳的电化学还原。这种纳米孔修饰的结构是通过合金化-脱合金工艺获得的。扫描电子显微镜，能量色散X射线光谱，X射线衍射和X射线光电子光谱证实了这种铜电极的合金层的形成和最终的纳米孔形态。当用于电解过程中时，所制备的纳米孔修饰电极可以将法拉第对甲烷的效率抑制在1％以下，同时在0.1 M KHCO ₃水溶液中将乙烯的法拉第效率保持在35％的高水平。-1.3 V（相对于可逆氢电极）溶液，因此显示出对乙烯生产的显着选择性。乙烯的高产率可以归因于暴露的特定晶体取向。

更新日期：2017-09-15

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