Abstract:
:Efficient electroreduction of carbon dioxide to multicarbon products in aqueous solution is of great importance and challenging. Unfortunately, the low efficiency of the production of C2 products limits implementation at scale. Here, we report reduction of carbon dioxide to C2 products (acetic acid and ethanol) over a 3D dendritic copper-cuprous oxide composite fabricated by in situ reduction of an electrodeposited copper complex. In potassium chloride aqueous electrolyte, the applied potential was as low as -0.4 V vs reversible hydrogen electrode, the overpotential is only 0.53 V (for acetic acid) and 0.48 V (for ethanol) with high C2 Faradaic efficiency of 80% and a current density of 11.5 mA cm-2. The outstanding performance of the electrode for producing the C2 products results mainly from near zero contacting resistance between the electrocatalysts and copper substrate, abundant exposed active sites in the 3D dendritic structure and suitable copper(I)/copper(0) ratio of the electrocatalysts.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Zhu Q,Sun X,Yang D,Ma J,Kang X,Zheng L,Zhang J,Wu Z,Han Bdoi
10.1038/s41467-019-11599-7subject
Has Abstractpub_date
2019-08-26 00:00:00pages
3851issue
1issn
2041-1723pii
10.1038/s41467-019-11599-7journal_volume
10pub_type
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