Issue 31, 2022

Ag@Pd bimetallic structures for enhanced electrocatalytic CO2 conversion to CO: an interplay between the strain effect and ligand effect

Abstract

Electrochemical CO2 reduction reactions provide a promising path to effectively convert CO2 into valuable chemicals and fuels for industries. Among the many CO2 conversion catalysts, Pd stands out as a promising catalyst for effective CO2 to CO conversion. Here, using the misfit strain strategy, Ag@Pd bimetallic nanoparticles with different Pd overlayer contents were prepared as CO2 reduction catalysts. By varying the Pd overlayer content, all the Ag@Pd bimetallic nanoparticles exhibited superior CO2 conversion performance over their Pd and Ag nanoparticle counterparts. An optimal Pd-to-Ag ratio of 1.5 : 1 yielded the highest CO faradaic efficiency of 94.3% at −0.65 V vs. RHE with a high CO specific current density of 3.9 mA cm−2. It was found that the Pd content can substantially affect the interplay between the strain effect and ligand effect, resulting in optimized binding properties of the reaction intermediates on the catalyst surface, thereby enhancing the CO2 reduction performance.

Graphical abstract: Ag@Pd bimetallic structures for enhanced electrocatalytic CO2 conversion to CO: an interplay between the strain effect and ligand effect

Supplementary files

Article information

Article type
Paper
Submitted
03 juin 2022
Accepted
15 juil. 2022
First published
15 juil. 2022

Nanoscale, 2022,14, 11187-11196

Ag@Pd bimetallic structures for enhanced electrocatalytic CO2 conversion to CO: an interplay between the strain effect and ligand effect

Z. Chen, X. Wang, L. Wang and Y. A. Wu, Nanoscale, 2022, 14, 11187 DOI: 10.1039/D2NR03079A

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