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A reconstructed porous copper surface promotes selectivity and efficiency toward C₂ products by electrocatalytic CO₂ reduction.

ABSTRACT: Electrocatalytic synthesis of multicarbon (C₂₊) products from CO₂ reduction suffers from poor selectivity and low energy efficiency. Herein, a facile oxidation-reduction cycling method is adopted to reconstruct the Cu electrode surface with the help of halide anions. The surface composed of entangled Cu nanowires with hierarchical pores is synthesized in the presence of I^-, exhibiting a C₂ faradaic efficiency (FE) of 80% at -1.09 V vs. RHE. A partial current density of 21 mA cm^-2 is achieved with a C₂ half-cell power conversion efficiency (PCE) of 39% on this electrode. Such high selective C₂ production is found to mainly originate from CO intermediate enrichment inside hierarchical pores rather than the surface lattice effect of the Cu electrode.

SUBMITTER: Han J

PROVIDER: S-EPMC8162280 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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A reconstructed porous copper surface promotes selectivity and efficiency toward C2 products by electrocatalytic CO2 reduction.

Han Jianyu J Long Chang C Zhang Jing J Hou Ke K Yuan Yi Y Wang Dawei D Zhang Xiaofei X Qiu Xueying X Zhu Yanfei Y Zhang Yin Y Yang Zhongjie Z Yan Shuhao S Tang Zhiyong Z

Chemical science 20200519 39

Electrocatalytic synthesis of multicarbon (C2+) products from CO2 reduction suffers from poor selectivity and low energy efficiency. Herein, a facile oxidation-reduction cycling method is adopted to reconstruct the Cu electrode surface with the help of halide anions. The surface composed of entangled Cu nanowires with hierarchical pores is synthesized in the presence of I-, exhibiting a C2 faradaic efficiency (FE) of 80% at -1.09 V vs. RHE. A pa ...[more]

PMID: 34094322

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