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Structure-evolved YbBiO3 perovskites for highly formate-selective CO2 electroreduction.

Jiaying Yan1, Xuanyu Wang1, Yayu Guan1

  • 1Institute for Sustainable Energy, College of Sciences, Shanghai University, Shangda Road 99, Baoshan, Shanghai 200444, China. liuyuyu@shu.edu.cn.

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|March 28, 2023
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Summary
This summary is machine-generated.

This study introduces an efficient YbBiO3 perovskite catalyst for electrochemical CO2 reduction to formate. The catalyst achieves high efficiency over a wide potential range, offering a promising route for carbon neutrality.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Electrochemical reduction of CO2 (ERCO2) is crucial for carbon neutrality.
  • Perovskite materials show promise in catalysis but are understudied for aqueous ERCO2.
  • Investigating novel catalysts for efficient CO2 conversion is essential.

Purpose of the Study:

  • To develop an efficient perovskite catalyst for ERCO2 to formate.
  • To investigate the catalytic performance and structural evolution of the catalyst during ERCO2.
  • To understand the role of surface reconstruction in optimizing ERCO2.

Main Methods:

  • Synthesis of YbBiO3 perovskite catalyst (YBO@800).
  • Electrochemical characterization of CO2 reduction performance.
  • Analysis of catalyst structural evolution and surface reconstruction.

Main Results:

  • YBO@800 achieved a maximum faradaic efficiency of 98.3% for CO2 to formate at -0.9 V RHE.
  • High faradaic efficiency (>90%) was maintained over a broad potential range (-0.8 to -1.2 V RHE).
  • Structural evolution and Bi/YbBiO3 heterostructure formation were observed, optimizing the rate-determining step.

Conclusions:

  • YbBiO3 is an effective perovskite catalyst for aqueous ERCO2.
  • Surface reconstruction and heterostructure formation are key to enhancing catalytic performance.
  • This work provides insights for designing advanced perovskite catalysts for CO2 conversion.