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Lee, Jae Sung
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One-dimensional CuIn alloy nanowires as a robust and efficient electrocatalyst for selective CO2-to-CO conversion

Author(s)
Jang, Youn JeongLee, JaehyukKim, Ju HunLee, Byeong JunLee, Jae Sung
Issued Date
2018-02
DOI
10.1016/j.jpowsour.2017.12.070
URI
https://scholarworks.unist.ac.kr/handle/201301/23270
Fulltext
https://www.sciencedirect.com/science/article/pii/S0378775317316798?via%3Dihub
Citation
JOURNAL OF POWER SOURCES, v.378, pp.412 - 417
Abstract
Electrical anodization of Cu foil produces one-dimensional Cu nanowires of high surface areas, which turns to CuIn alloy nanowires by indium electrodeposition replacing edge site Cu atoms. An electrochemical pre-activation forms a highly conformal amorphous In(OH)(3) overlayer with oxygen vacancy on the CuIn alloy that facilitates CO2 adsorption to promote selective CO formation suppressing competing H-2 adsorption. Thus the activated CuIn alloy nanowires catalyse electrochemical CO2 conversion to CO with high CO selectivity (> 68.2%) and high current density (ca. -3.9 mAcm(-2)) at -0.6 Vim, which represents the higher partial CO current density (ca. -2.66 mAcm(-2)) than that of previously reported CuIn alloy powders without nanostructuring. The performance remains stable for more than 15 h without significant degradation.
Publisher
ELSEVIER SCIENCE BV
ISSN
0378-7753
Keyword (Author)
CuIn alloyElectrocatalystElectrocatalytic CO2 reductionNanowiresSelective CO production
Keyword
ELECTROCHEMICAL REDUCTIONCARBON-DIOXIDECO2 REDUCTIONMETAL-ELECTRODESELECTROREDUCTIONCOPPERCATALYSTSSURFACEAUMONOXIDE

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