Issue 33, 2024

Electrochemical CO2-to-CO via enriched oxygen vacancies at gold/ceria interfaces

Abstract

The carbon dioxide electroreduction reaction (CO2RR) to carbon monoxide (CO) is a promising avenue to store renewable energy. Gold (Au) is a critical component of catalysts for CO production in the CO2RR. Still, the high cost of Au together with the low mass activity hinders its potential towards practical CO2RR application. Here we report a strategy of catalyst design, oxygen vacancy modulation via controlling Au/ceria interface structures, to promote Au mass activity for CO production (jCO,mass) in the CO2RR. Through ceria-nanocube-supported Au nanoparticle fabrication, we construct Au/CeO2{100} interfaces with high concentration of oxygen vacancies facilitating CO2 adsorption and activation. We achieve, at 200 mA cm−2, a record jCO,mass of 678 mA mgAu−1 in the CO2RR, a 1.3× improvement relative to the best prior reports.

Graphical abstract: Electrochemical CO2-to-CO via enriched oxygen vacancies at gold/ceria interfaces

Supplementary files

Article information

Article type
Communication
Submitted
31 Mei 2024
Accepted
30 Jul 2024
First published
31 Jul 2024

J. Mater. Chem. A, 2024,12, 21716-21722

Electrochemical CO2-to-CO via enriched oxygen vacancies at gold/ceria interfaces

Z. Zhao, C. Tan, P. Sun, F. Li and X. Wang, J. Mater. Chem. A, 2024, 12, 21716 DOI: 10.1039/D4TA03768E

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