Issue 8, 2022

In situ reconstruction of vegetable sponge-like Bi2O3 for efficient CO2 electroreduction to formate

Abstract

The electrochemical reduction reaction of CO2 provides a renewable method to close the carbon cycle and alleviate the global energy issue. Bi-based electrocatalysts present huge prospects for catalyzing formate-selective CO2 reduction. Herein, we fabricated a porous vegetable sponge-like bismuth oxide (VS-Bi2O3) for the selective electroreduction of CO2 to formate, which underwent in situ reconstruction to form 2D nanosheets containing metallic Bi and Bi2O2CO3. We propose that the unique porous morphology and low crystallinity of VS-Bi2O3 are beneficial for the in situ generation of Bi2O2CO3, which might play a significant role in enhancing the CO2 electrocatalysis performance. The catalyst delivers a 93.7% faradaic efficiency of formate at 400 mA cm−2 and shows stability for over 18 h at 100 mA cm−2.

Graphical abstract: In situ reconstruction of vegetable sponge-like Bi2O3 for efficient CO2 electroreduction to formate

Supplementary files

Article information

Article type
Research Article
Submitted
26 nov. 2021
Accepted
03 mars 2022
First published
04 mars 2022

Mater. Chem. Front., 2022,6, 1091-1097

In situ reconstruction of vegetable sponge-like Bi2O3 for efficient CO2 electroreduction to formate

Y. Shi, C. F. Wen, X. Wu, J. Y. Zhao, F. Mao, P. F. Liu and H. G. Yang, Mater. Chem. Front., 2022, 6, 1091 DOI: 10.1039/D1QM01557E

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