Journal
ELECTROCHIMICA ACTA
Volume 271, Issue -, Pages 544-550Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.03.156
Keywords
Copper-cadmium bimetallic; CO2 electroreduction; Selectivity; Catalyst
Categories
Funding
- NSFC Major International (Regional) Joint Research Project NSFC-SNSF [51661135023]
- NSFC [21673091]
- 973 Program of China [2014CB643506]
- Fundamental Research Funds for the Central Universities [HUST: 2016YXMS031]
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Electrochemical reduction carbon dioxide (CO2) can produce value-added chemicals such as carbon monoxide and hydrocarbon. However, the sluggish kinetic process and complex reaction routes of CO2 electro-reduction reaction (CO2RR) largely limit the conversion efficiency and products selectivity. Herein, a Cu2Cd/Cd/Cu bimetallic catalyst by imbedding Cd bulks onto Cu substrate surface was designed and applied for the CO2RR. This catalyst presents good conductivity and selectivity toward the CO2RR. Particularly, the catalyst shows CO conversion faradaic efficiency of 84% with a current density of 8 mA cm(-2) at -1.0 V vs. RHE in CO2-saturated 0.1 M KHCO3 solution. Detailed investigation has revealed that the electrocatalytic capability of this catalyst can be attributed to the boundaries between Cu and Cd that could provide sufficient active sites for the CO2RR and the formation of Cu2Cd alloy that could enhance the binding energy between the catalyst and the intermediate. (C) 2018 Elsevier Ltd. All rights reserved.
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