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Nano Research 2023, 16(5): 6661-6669 https://doi.org/10.1007/s12274-023-5444-1
Research Article | Issue | Published: 28 February 2023

In situ structural evolution of BiOCOOH nanowires and their performance towards electrocatalytic CO2 reduction

Show Author's Information Yinlong Jiang1,2,§,  Qingsong Chen1,§( ),  Di Wang1,  Xin Li1,  Yuping Xu1,  Zhongning Xu1,  Guocong Guo1( )
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
College of Chemistry, Fuzhou University, Fuzhou 350116, China

§ Yinlong Jiang and Qingsong Chen contributed equally to this work.

Keywords:
carbon dioxide, electrocatalysis, bismuth, structure evolution, formate
Topics:
Electrocatalysis
Cite this article:
Jiang Y, Chen Q, Wang D, et al. In situ structural evolution of BiOCOOH nanowires and their performance towards electrocatalytic CO2 reduction. Nano Research, 2023, 16(5): 6661-6669. https://doi.org/10.1007/s12274-023-5444-1
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Abstract Full text Electronic supplementary material About this article

Bismuth-based materials have attracted broad research interest as catalysts for electrocatalytic CO2 reduction (ECR) to formate in recent years. Most studies have been focused on exploring materials with high activity, selectivity, and durability, while little attention has been paid to the catalysts structure stability especially under working conditions of CO2 electrolysis. Here, starting from the precursor of bismuth oxide formate nanowires (BiOCOOH NWs), it was found that BiOCOOH NWs were easy to electrochemically evolve into two-dimensional sheet structure in CO2-saturated KHCO3 solution and would further reconstitute into larger ultrathin bismuth nanosheets covered with amorphous oxide thin layer (Bi/BiOx NSs). However, in Ar-saturated HCOONa solution, the one-dimensional structure could be maintained and reconstructed into rough porous bismuth nanowires (Bi NWs). Bi NWs showed less stability during ECR, which also generated surface amorphous oxide layer and further fragmentated into nanoparticles or nanosheets. Bi/BiOx NSs showed better activity, selectivity, and stability than Bi NWs, thanks to the high exposing active sites, enhancing CO2 adsorption and charge transfer. The demonstrated electrolyte dependence of structure evolution for bismuth-based catalysts and their performance for CO2 electroreduction could provide guidance for the design and synthesis of efficient catalysts.


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Abstract
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Electronic supplementary material
About this article

In situ structural evolution of BiOCOOH nanowires and their performance towards electrocatalytic CO2 reduction

Show Author's information Yinlong Jiang1,2,§, Qingsong Chen1,§( ), Di Wang1, Xin Li1, Yuping Xu1, Zhongning Xu1, Guocong Guo1( )
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
College of Chemistry, Fuzhou University, Fuzhou 350116, China

§ Yinlong Jiang and Qingsong Chen contributed equally to this work.

Abstract

Bismuth-based materials have attracted broad research interest as catalysts for electrocatalytic CO2 reduction (ECR) to formate in recent years. Most studies have been focused on exploring materials with high activity, selectivity, and durability, while little attention has been paid to the catalysts structure stability especially under working conditions of CO2 electrolysis. Here, starting from the precursor of bismuth oxide formate nanowires (BiOCOOH NWs), it was found that BiOCOOH NWs were easy to electrochemically evolve into two-dimensional sheet structure in CO2-saturated KHCO3 solution and would further reconstitute into larger ultrathin bismuth nanosheets covered with amorphous oxide thin layer (Bi/BiOx NSs). However, in Ar-saturated HCOONa solution, the one-dimensional structure could be maintained and reconstructed into rough porous bismuth nanowires (Bi NWs). Bi NWs showed less stability during ECR, which also generated surface amorphous oxide layer and further fragmentated into nanoparticles or nanosheets. Bi/BiOx NSs showed better activity, selectivity, and stability than Bi NWs, thanks to the high exposing active sites, enhancing CO2 adsorption and charge transfer. The demonstrated electrolyte dependence of structure evolution for bismuth-based catalysts and their performance for CO2 electroreduction could provide guidance for the design and synthesis of efficient catalysts.

Keywords: carbon dioxide, electrocatalysis, bismuth, structure evolution, formate

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Acknowledgements

Publication history

Received: 20 October 2022
Revised: 11 December 2022
Accepted: 26 December 2022
Published: 28 February 2023
Issue date: May 2023

Copyright

© Tsinghua University Press 2023

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 21203200 and 91545201) and the National Key Research and Development Program of China (Nos. 2017YFA0206802 and 2017YFA0700103). We gratefully acknowledge the State key Laboratory of structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences for support of characterization.

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