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Issue 60, 2019
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Bifunctional electrocatalysis for CO2 reduction via surface capping-dependent metal–oxide interactions

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Abstract

Multi-component materials are a new trend in catalyst development for electrochemical CO2 reduction. Understanding and managing the chemical interactions within a complex catalyst structure may unlock new or improved reactivity, but is scientifically challenging. We report the first example of capping ligand-dependent metal–oxide interactions in Au/SnO2 structures for electrocatalytic CO2 reduction. Cetyltrimethylammonium bromide capping on the Au nanoparticles enables bifunctional CO2 reduction where CO is produced at more positive potentials and HCOO at more negative potentials. With citrate capping or no capping, the Au–SnO2 interactions steer the selectivity toward H2 evolution at all potentials. Using electrochemical CO oxidation as a probe reaction, we further confirm that the metal–oxide interactions are strongly influenced by the capping ligand.

Graphical abstract: Bifunctional electrocatalysis for CO2 reduction via surface capping-dependent metal–oxide interactions

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Supplementary files

Article information


Submitted
15 Apr 2019
Accepted
13 Jun 2019
First published
17 Jun 2019

Chem. Commun., 2019,55, 8864-8867
Article type
Communication
Author version available

Bifunctional electrocatalysis for CO2 reduction via surface capping-dependent metal–oxide interactions

Y. Wu, X. Yuan, Z. Tao and H. Wang, Chem. Commun., 2019, 55, 8864 DOI: 10.1039/C9CC02934F

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