Branched Copper Oxide Nanoparticles Induce Highly Selective Ethylene Production by Electrochemical Carbon Dioxide Reduction

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For long-term storage of renewable energy, the electrochemical carbon dioxide reduction reaction (CO2RR) offers a promising option for converting electricity to permanent forms of chemical energy. In this work, we present highly selective ethylene production dependent upon the catalyst morphology using copper oxide nanoparticles. The branched CuO nanoparticles were synthesized and then deposited on conductive carbon materials. After activation, the major copper species changed to Cu+, and the resulting electrocatalyst exhibited a high Faradaic efficiency (FE) of ethylene reaching over 70% and a hydrogen FE of 30% without any byproducts in a neutral aqueous solution. The catalyst also showed high durability (up to 12 h) with the ethylene FE over 65%. Compared to cubic morphology, the initial branched copper oxide structure formed highly active domains with interfaces and junctions in-between during activation, which caused large surface area with high local pH leading to high selectivity and activity for ethylene production.
Publisher
AMER CHEMICAL SOC
Issue Date
2019-05
Language
English
Article Type
Article
Citation

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.141, no.17, pp.6986 - 6994

ISSN
0002-7863
DOI
10.1021/jacs.9b00911
URI
http://hdl.handle.net/10203/262207
Appears in Collection
CH-Journal Papers(저널논문)
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