Journal
NANO LETTERS
Volume 20, Issue 7, Pages 4823-4828Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c00639
Keywords
CO2 reduction; C-C coupling; electrocatalysis; electrodeposition; EDTA; hollow porous copper microspheres
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Funding
- National Natural Science Foundation of China [21775070]
- International Cooperation Foundation from the Ministry of Science and Technology [2016YFE0130100, 2017M621694, 2018T110475]
- Washington State University Start-up Funds
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Electrochemical reduction of CO2 into value-added products is an effective approach to relieve environmental and energetic issues. Herein, EDTA anion-modified porous hollow copper microspheres (H-Cu MPs) were constructed by EDTA-2Na-assisted electrodeposition. The faradic efficiency (FE) of ethylene doubled from 23.3% to 50.1% at -0.82 V vs RHE in nearly neutral 0.1 M KHCO3 solution, one of the highest values among copper-based electrodeposited catalysts. Apart from the favorable influence from morphology regulated by EDTA-2Na, theoretical calculations revealed that the adsorbed EDTA anions were able to create a local charged copper surface to stabilize the transition state and dimer and to assist in the stabilization by interacting with OCCO adsorbate synergistically, which contributed to the outstanding catalytic performance together.
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