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Research Article | Open Access

Intimate atomic Cu-Ag interfaces for high CO2RR selectivity towards CH4 at low over potential

Chungseok Choi1,§, Jin Cai1,§, Changsoo Lee1,2,3,§, Hyuck Mo Lee3, Mingjie Xu4,5, Yu Huang1 ( )
Department of Materials Science and Engineering,University of California,Los Angeles, CA,90095,USA;
Hydrogen Energy Department, Korea Institute of Energy Research, 152 Gajeong-ro,34129,Republic of Korea ;
Department of Materials Science and Engineering,Korea Advanced Institute of Science and Technology 291 Daehak-ro, Yuseong-gu,Daejeon,34141,Republic of Korea;
Irvine Materials Research Institute (IMRI),University of California,Irvine, CA,92697,USA;
Department of Materials Science and Engineering,University of California,Irvine, CA,92697,USA;

§ Chungseok Choi, Jin Cai, and Changsoo Lee contributed equally to this work.

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Abstract

Developing highly efficient electrochemical catalysts for carbon dioxide reduction reaction (CO2RR) provides a solution to battle global warming issues resulting from ever-increasing carbon footprint due to human activities. Copper (Cu) is known for its efficiency in CO2RR towards value-added hydrocarbons; hence its unique structural properties along with various Cu alloys have been extensively explored in the past decade. Here, we demonstrate a two-step approach to achieve intimate atomic Cu-Ag interfaces on the surface of Cu nanowires, which show greatly improved CO2RR selectivity towards methane (CH4). The specially designed Cu-Ag interfaces showed an impressive maximum Faradaic efficiency (FE) of 72% towards CH4 production at -1.17 V (vs. reversible hydrogen electrode (RHE)).

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Keywords

electrochemical CO2 reduction reactioncatalystcoppersilverbimetallic interface

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Nano Research
Volume 14 Issue 10,
October 2021
Pages 3497-3501
DOI: 10.1007/s12274-021-3639-x

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Cite this article:
Choi C, Cai J, Lee C, et al. Intimate atomic Cu-Ag interfaces for high CO2RR selectivity towards CH4 at low over potential. Nano Research, 2021, 14(10): 3497-3501. https://doi.org/10.1007/s12274-021-3639-x
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Electrocatalysis

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Received: 10 March 2021
Revised: 25 May 2021
Accepted: 02 June 2021
Published: 21 July 2021
© The Author(s) 2021

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