Selective Electrochemical Reduction of CO2 to Ethylene on Nanopores-Modified Copper Electrodes in Aqueous Solution.
Yuecheng PengTian WuLibo SunJean M V NsanzimanaAdrian C FisherXin WangPublished in: ACS applied materials & interfaces (2017)
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.
Keyphrases
- solid state
- electron microscopy
- carbon dioxide
- ionic liquid
- high resolution
- single molecule
- aqueous solution
- gold nanoparticles
- oxide nanoparticles
- dual energy
- molecularly imprinted
- magnetic resonance imaging
- room temperature
- anaerobic digestion
- carbon nanotubes
- gas chromatography mass spectrometry
- gas chromatography
- structural basis
- crystal structure