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Volume 4 Issue 3
Apr.  2022
Article Contents

Wang H B, Tang C Y, Sun B,  Liu J C, Xia Y,  Li W Q, Jiang C Z, He D, Xiao X H. 2022. In-situ structural evolution of Bi2O3 nanoparticle catalysts for CO2 electroreduction. Int. J. Extrem. Manuf. 4 035002.
Citation: Wang H B, Tang C Y, Sun B,  Liu J C, Xia Y,  Li W Q, Jiang C Z, He D, Xiao X H. 2022. In-situ structural evolution of Bi2O3 nanoparticle catalysts for CO2 electroreduction. Int. J. Extrem. Manuf. 035002.

In-situ structural evolution of Bi2O3 nanoparticle catalysts for CO2 electroreduction


doi: 10.1088/2631-7990/ac7a6e
More Information
  • Publish Date: 2022-04-26
  • Under the complex external reaction conditions, uncovering the true structural evolution of the catalyst is of profound significance for the establishment of relevant structure-activity relationships and the rational design of electrocatalysts. Here, the surface reconstruction of the catalyst was characterized by ex-situ methods and in-situ Raman spectroscopy in CO2 electroreduction. The final results showed that the Bi2O3 nanoparticles were transformed into Bi/Bi2O3 two-dimensional thin-layer nanosheets (NSs). It is considered to be the active phase in the electrocatalytic process. The Bi/Bi2O3 NSs showed good catalytic performance with a Faraday efficiency (FE) of 94.8% for formate and a current density of 26 mA cm-2 at -1.01 V. While the catalyst maintained a 90% FE in a wide potential range (-0.91 V to -1.21 V) and long-term stability (24 h). Theoretical calculations support the theory that the excellent performance originates from the enhanced bonding state of surface Bi-Bi, which stabilized the adsorption of the key intermediate OCHO* and thus promoted the production of formate.

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In-situ structural evolution of Bi2O3 nanoparticle catalysts for CO2 electroreduction

doi: 10.1088/2631-7990/ac7a6e
  • 1 Department of Physics, Hubei Nuclear Solid Physics Key Laboratory, Wuhan University, Wuhan 430072, People's Republic of China;
  • 2 Hubei Yangtze Memory Laboratories, Wuhan 430205, People's Republic of China

Abstract: 

Under the complex external reaction conditions, uncovering the true structural evolution of the catalyst is of profound significance for the establishment of relevant structure-activity relationships and the rational design of electrocatalysts. Here, the surface reconstruction of the catalyst was characterized by ex-situ methods and in-situ Raman spectroscopy in CO2 electroreduction. The final results showed that the Bi2O3 nanoparticles were transformed into Bi/Bi2O3 two-dimensional thin-layer nanosheets (NSs). It is considered to be the active phase in the electrocatalytic process. The Bi/Bi2O3 NSs showed good catalytic performance with a Faraday efficiency (FE) of 94.8% for formate and a current density of 26 mA cm-2 at -1.01 V. While the catalyst maintained a 90% FE in a wide potential range (-0.91 V to -1.21 V) and long-term stability (24 h). Theoretical calculations support the theory that the excellent performance originates from the enhanced bonding state of surface Bi-Bi, which stabilized the adsorption of the key intermediate OCHO* and thus promoted the production of formate.

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