In Situ Bismuth Nanosheet Assembly for Highly Selective Electrocatalytic CO2 Reduction to Formate

The reduction of carbon dioxide (CO2) into value‐added fuels using an electrochemical method has been regarded as a compelling sustainable energy conversion technology. However, high‐performance electrocatalysts for CO2 reduction reaction (CO2RR) with high formate selectivity and good stability need...

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Published in:Chemistry, an Asian journal an Asian journal, 2021-06, Vol.16 (12), p.1539-1544
Main Authors: Peng, Chan‐Juan, Wu, Xin‐Tao, Zeng, Guang, Zhu, Qi‐Long
Format: Article
Language:English
Subjects:
Assembly
Bismuth
bismuth nanosheets
Carbon dioxide
Chemical reduction
Chemistry
Electrocatalysts
electrocatalytic CO2 reduction
Electrolysis
Energy conversion
formate
in situ electrochemical transformation
Nanosheets
Nanostructure
Oxidation
Selectivity
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creator Peng, Chan‐Juan
Wu, Xin‐Tao
Zeng, Guang
Zhu, Qi‐Long
description The reduction of carbon dioxide (CO2) into value‐added fuels using an electrochemical method has been regarded as a compelling sustainable energy conversion technology. However, high‐performance electrocatalysts for CO2 reduction reaction (CO2RR) with high formate selectivity and good stability need to be improved. Earth‐abundant Bi has been demonstrated to be active for CO2RR to formate. Herein, we fabricated an extremely active and selective bismuth nanosheet (Bi‐NSs) assembly via an in situ electrochemical transformation of (BiO)2CO3 nanostructures. The as‐prepared material exhibits high activity and selectivity for CO2RR to formate, with nearly 94% faradaic efficiency at −1.03 V (versus reversible hydrogen electrode (vs. RHE)) and stable selectivity (>90%) in a large potential window ranging from −0.83 to −1.18 V (vs. RHE) and excellent durability during 12 h continuous electrolysis. In addition, the Bi‐NSs based CO2RR/methanol oxidation reaction (CO2RR/MOR) electrolytic system for overall CO2 splitting was constructed, evidencing the feasibility of its practical implementation. An unique bismuth nanosheet (Bi‐NSs) assembly was prepared by an in situ electrochemical transformation method. The as‐prepared material possesses sufficient exposure of the active sites and notable enhancement of the intrinsic activity, leading to a significantly boosted performance for CO2 reduction to formate with near‐unity Faradaic efficiency in a wide potential window range, exceptional current densities and long‐term stability.
doi_str_mv 10.1002/asia.202100305
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subjects Assembly
Bismuth
bismuth nanosheets
Carbon dioxide
Chemical reduction
Chemistry
Electrocatalysts
electrocatalytic CO2 reduction
Electrolysis
Energy conversion
formate
in situ electrochemical transformation
Nanosheets
Nanostructure
Oxidation
Selectivity
title In Situ Bismuth Nanosheet Assembly for Highly Selective Electrocatalytic CO2 Reduction to Formate
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