Carbon dioxide electroreduction to C2 products over copper-cuprous oxide derived from electrosynthesized copper complex.

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 Commun

journal_title

Nature communications

authors

Zhu Q,Sun X,Yang D,Ma J,Kang X,Zheng L,Zhang J,Wu Z,Han B

doi

10.1038/s41467-019-11599-7

subject

Has Abstract

pub_date

2019-08-26 00:00:00

pages

3851

issue

1

issn

2041-1723

pii

10.1038/s41467-019-11599-7

journal_volume

10

pub_type

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