Issue 25, 2020

Synergies between electronic and geometric effects of Mo-doped Au nanoparticles for effective CO2 electrochemical reduction

Abstract

CO2 electroreduction is developing as a promising technology to solve environmental and energy problems. Alloy catalysts with dissimilar local metal atoms induce geometric and electronic effects that may greatly contribute to their performance. However, the fundamental mechanisms for CO2 reduction on a bimetallic Au alloy surface are still ambiguous. Here, we report effective CO2 reduction by the synergies between electronic and geometric effects of Mo-doped Au nanoparticles (MDA NPs). A 97.5% CO faradaic efficiency and 75-fold higher current density than pure Au nanoparticles were achieved at −0.4 V versus the reversible hydrogen electrode for MDA NPs with at least 50 h lifetime. Our experimental and theoretical calculation results reveal that the Au surface with increased electron density from Mo can effectively enhance CO2 activation. Moreover, the intermediate *COOH may be further stabilized by the local Mo atom through additional Mo–O binding to decrease the energy barrier.

Graphical abstract: Synergies between electronic and geometric effects of Mo-doped Au nanoparticles for effective CO2 electrochemical reduction

Supplementary files

Article information

Article type
Communication
Submitted
01 May 2020
Accepted
04 Jun 2020
First published
04 Jun 2020

J. Mater. Chem. A, 2020,8, 12291-12295

Author version available

Synergies between electronic and geometric effects of Mo-doped Au nanoparticles for effective CO2 electrochemical reduction

K. Sun, Y. Ji, Y. Liu and Z. Wang, J. Mater. Chem. A, 2020, 8, 12291 DOI: 10.1039/D0TA04551A

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