Electrochemically Driven Formation of Sponge-Like Porous Silver Nanocubes Toward Efficient CO2 Electroreduction to CO

Tingting Fan; Qiuling Wu; Zhou Yang; Yipeng Song; Jiguang Zhang; Pingping Huang; Zhou Chen; Yunyun Dong; Weiping Fang; Xiaodong Yi

doi:10.1002/cssc.201903558

Electrochemically Driven Formation of Sponge-Like Porous Silver Nanocubes Toward Efficient CO₂ Electroreduction to CO

ChemSusChem. 2020 May 22;13(10):2677-2683. doi: 10.1002/cssc.201903558. Epub 2020 Mar 31.

Authors

Affiliations

¹ National Engineering Laboratory for Green Chemical Productions of, Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China.
² College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, P.R. China.

PMID: 32020717
DOI: 10.1002/cssc.201903558

Abstract

Electrochemical conversion of CO₂ into valuable products by utilizing renewable electricity is a thriving research field. For electrochemical reduction of CO₂ to CO, uniform sponge-like porous Ag nanocubes (SPC-Ag) integrated on carbon paper are prepared by using an electrochemically driven method. The SPC-Ag has a 3 D porous structure and a large specific surface area, which affords abundant active sites for the CO₂ reduction reaction (CO₂ RR), as well as reducing impedance to accelerate the CO₂ RR kinetics. This distinctive organization affords SPC-Ag with outstanding electrocatalytic performance for CO₂ reduction to CO. High faradaic efficiency (>90 %) and large partial current density for CO with excellent durability are observed in a wide potential window, with a maximum value of 93 % at -0.9 V versus reversible hydrogen electrode.

Keywords: CO2 reduction; electrocatalysis; in situ structural transformation; porous Ag nanocubes; porous organization.

Abstract

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