Issue 6, 2024

A defective bismuth–indium catalyst promotes water dissociation for selective carbon dioxide electroreduction to HCOOH

Abstract

Electroreduction of CO2 to formic acid (HCOOH) is promising for CO2 utilization but remains a substantial challenge due to the lack of high-efficiency electrocatalysts. Herein, the defective BiIn bimetallic catalyst derived from a P-doped BiIn pre-catalyst is developed, which enables CO2 conversion to HCOOH with high activity and selectivity. Mechanistic investigations demonstrate that: (i) the interaction between Bi and In orbitals optimizes the adsorption strength of the key intermediate *OCHO; and (ii) the P leakage could induce the generation of defective BiIn during the self-reconstruction process, which strengthens *OH adsorption, resulting in an accelerated water dissociation and promoted CO2 reduction. The defective BiIn@P catalyst exhibits a 97.3% faradaic efficiency at a current density of 500 mA cm−2 in alkaline electrolytes. This work deepens our understanding of the CO2 reduction mechanism on a BiIn-based catalyst, guiding in the design of advanced CO2R catalysts.

Graphical abstract: A defective bismuth–indium catalyst promotes water dissociation for selective carbon dioxide electroreduction to HCOOH

Supplementary files

Article information

Article type
Research Article
Submitted
07 jan 2024
Accepted
03 feb 2024
First published
20 feb 2024

Inorg. Chem. Front., 2024,11, 1703-1709

A defective bismuth–indium catalyst promotes water dissociation for selective carbon dioxide electroreduction to HCOOH

J. Zhou, L. Li, H. Ren, H. Wang, Y. Li, K. Liu, L. Huang, X. Yang, Z. Hao, Y. Zhang, Z. Wang, X. Wang, J. Ding, Y. Ji, L. Wang and H. Liang, Inorg. Chem. Front., 2024, 11, 1703 DOI: 10.1039/D4QI00053F

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