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Issue 46, 2020
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In situ transformation of bismuth metal–organic frameworks for efficient selective electroreduction of CO2 to formate

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Abstract

The bismuth-based materials are proven as valid electrocatalysts for electrochemical conversion of carbon dioxide (CO2) into formate (HCOO). Herein, we discover that HCO3 can destroy the Bi–O bonds of the bismuth–carboxylate MOF to achieve in situ transformation into Bi2O2CO3 (MOF-derived Bi2O2CO3), which is merely explored yet. MOF-derived Bi2O2CO3 shows superior electrocatalytic performance in a broad range of potentials and demonstrates a formate faradaic efficiency (FEHCOO) of 96.1% as well as an outstanding durability in 48 h with a current density about 10 mA cm−2 at a potential of −0.669 V vs. RHE. And compared with the structurally similar bismuth oxyhalides, MOF-derived Bi2O2CO3 possesses higher stability and lower CO2 concentration-dependence during CO2 reduction. Furthermore, this work puts a new strategy forward to achieve in situ MOF transformation and to comprehend the stability of electrocatalysts.

Graphical abstract: In situ transformation of bismuth metal–organic frameworks for efficient selective electroreduction of CO2 to formate

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Article information


Submitted
18 Aug 2020
Accepted
26 Oct 2020
First published
26 Oct 2020

J. Mater. Chem. A, 2020,8, 24486-24492
Article type
Paper

In situ transformation of bismuth metal–organic frameworks for efficient selective electroreduction of CO2 to formate

W. Yuan, J. Wu, X. Zhang, S. Hou, M. Xu and Z. Gu, J. Mater. Chem. A, 2020, 8, 24486
DOI: 10.1039/D0TA08092F

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