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Nano Research 2024, 17(3): 1190-1198 https://doi.org/10.1007/s12274-023-5990-6
Research Article | Issue | Published: 29 August 2023

Bismuth clusters pinned on TiO2 porous nanowires boosting charge transfer for CO2 photoreduction to CH4

Show Author's Information Jiazhi Meng1,  Kaiwen Wang4,  Yang Wang1,  Jiangping Ma1,  Chaogang Ban1,  Yajie Feng1,  Bin Zhang5,  Kai Zhou5,  Liyong Gan1,  Guang Han3( ),  Danmei Yu2( ),  Xiaoyuan Zhou1,5( )
College of Physics and Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing 401331, China
School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Beijing Key Lab of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing 100124, China
Analytical and Testing Center, Chongqing University, Chongqing 401331, China
Keywords:
charge transfer, tandem catalysis, methanation, carbon dioxide (CO2) photoreduction
Topics:
Photocatalysts
Cite this article:
Meng J, Wang K, Wang Y, et al. Bismuth clusters pinned on TiO2 porous nanowires boosting charge transfer for CO2 photoreduction to CH4. Nano Research, 2024, 17(3): 1190-1198. https://doi.org/10.1007/s12274-023-5990-6
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Abstract Full text Electronic supplementary material About this article

Artificial photosynthesis in carbon dioxide (CO2) conversion into value-added chemicals attracts considerable attention but suffers from the low activity induced by sluggish separation of photogenerated carriers and the kinetic bottleneck-induced unsatisfied selectivity. Herein, we prepare a new-style Bi/TiO2 catalyst formed by pinning bismuth clusters on TiO2 nanowires through being confined by pores, which exhibits high activity and selectivity towards photocatalytic production of CH4 from CO2. Boosted charge transfer from TiO2 through Bi to the reactants is revealed via in situ X-ray photon spectroscopy and time-resolved photoluminescence (PL). Further, in situ Fourier transform infrared results confirm that Bi/TiO2 not only overcomes the multi-electron kinetics challenge of CO2 to CH4 via boosting charge transfer, but also facilitates proton production and transfer as well as the intermediates *CHO and *CH3O generation, ultimately achieving the tandem catalysis towards methanation. Theoretical calculation also underlies that the more favorable reaction step from *CO to *CHO on Bi/TiO2 results in CH4 production with higher selectivity. Our work brings new insights into rational design of photocatalysts with high performance and the formation mechanism of CO2 to CH4 for solar energy storage in future.


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Electronic supplementary material
About this article

Bismuth clusters pinned on TiO2 porous nanowires boosting charge transfer for CO2 photoreduction to CH4

Show Author's information Jiazhi Meng1, Kaiwen Wang4, Yang Wang1, Jiangping Ma1, Chaogang Ban1, Yajie Feng1, Bin Zhang5, Kai Zhou5, Liyong Gan1, Guang Han3( ), Danmei Yu2( ), Xiaoyuan Zhou1,5( )
College of Physics and Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing 401331, China
School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Beijing Key Lab of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing 100124, China
Analytical and Testing Center, Chongqing University, Chongqing 401331, China

Abstract

Artificial photosynthesis in carbon dioxide (CO2) conversion into value-added chemicals attracts considerable attention but suffers from the low activity induced by sluggish separation of photogenerated carriers and the kinetic bottleneck-induced unsatisfied selectivity. Herein, we prepare a new-style Bi/TiO2 catalyst formed by pinning bismuth clusters on TiO2 nanowires through being confined by pores, which exhibits high activity and selectivity towards photocatalytic production of CH4 from CO2. Boosted charge transfer from TiO2 through Bi to the reactants is revealed via in situ X-ray photon spectroscopy and time-resolved photoluminescence (PL). Further, in situ Fourier transform infrared results confirm that Bi/TiO2 not only overcomes the multi-electron kinetics challenge of CO2 to CH4 via boosting charge transfer, but also facilitates proton production and transfer as well as the intermediates *CHO and *CH3O generation, ultimately achieving the tandem catalysis towards methanation. Theoretical calculation also underlies that the more favorable reaction step from *CO to *CHO on Bi/TiO2 results in CH4 production with higher selectivity. Our work brings new insights into rational design of photocatalysts with high performance and the formation mechanism of CO2 to CH4 for solar energy storage in future.

Keywords: charge transfer, tandem catalysis, methanation, carbon dioxide (CO2) photoreduction

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Publication history
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Acknowledgements

Publication history

Received: 06 May 2023
Revised: 28 June 2023
Accepted: 08 July 2023
Published: 29 August 2023
Issue date: March 2024

Copyright

© Tsinghua University Press 2023

Acknowledgements

Acknowledgements

This work was financially supported in part by the National Natural Science Foundation of China (Nos. 52125103, 52071041 and 12074048), the Project for Fundamental and Frontier Research in Chongqing (Nos. cstc2020jcyj-msxmX0777 and cstc2020jcyj-msxmX0796). We would like to thank Ms. C. Y. Y. from the Analytical and Testing Center at Chongqing University for her helpful TRPL measurement and Ms. H. J. Z. for XRD characterization.

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