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Nano Research 2022, 15(8): 7042-7051 https://doi.org/10.1007/s12274-022-4360-0
Research Article | Issue | Published: 25 April 2022

Confining shell-sandwiched Ag clusters in MnO2-CeO2 hollow spheres to boost activity and stability of toluene combustion

Show Author's Information Menglan Xiao1,6,  Xueqin Yang2,  Yue Peng4,  Yucong Guo1,  Yuechang Wei5,  Maofa Ge1,3,6,  Xiaolin Yu1,6( )
State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
School of Environment, Tsinghua University, Beijing 100084, China
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
University of Chinese Academy of Sciences, Beijing 100049, China
Keywords:
hollow spheres, multi-interfaces, toluene combustion, active lattice oxygen
Topics:
Catalyst activity
Cite this article:
Xiao M, Yang X, Peng Y, et al. Confining shell-sandwiched Ag clusters in MnO2-CeO2 hollow spheres to boost activity and stability of toluene combustion. Nano Research, 2022, 15(8): 7042-7051. https://doi.org/10.1007/s12274-022-4360-0
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Abstract Full text Electronic supplementary material About this article

Supported noble metal catalysts have the promising application in volatile organic compounds (VOCs) catalytic combustion but suffer from the deactivation due to noble metal sintering at high temperatures. Herein, we report the construction of shell-sandwiched MnO2-Ag-CeO2 hollow spheres with remarkable sintering resistance and high activity in toluene combustion. Ag clusters were sandwiched between outer MnO2 and inner CeO2 shell to enlarge and stabilize metal–support active interface. The unique hollow structure could alter the electronic states of catalysts sites and increase the adsorbed site of reactant molecules. Meanwhile, Mn–Ag–Ce multi-interfaces in MnO2-Ag-CeO2 could facilitate the sustainable activation and the stable release of oxygen species via a tandem transfer. The oxygen species at Ag–Mn interface perimeter were instantly replenished by Ag–Ce interface to accelerate a deep oxidation of intermediates, guaranteeing the opening of benzene ring to generate maleic anhydride. This investigation provides a promising method for constructing efficient and sintering-resistant cluster catalysts for VOCs oxidation.


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About this article

Confining shell-sandwiched Ag clusters in MnO2-CeO2 hollow spheres to boost activity and stability of toluene combustion

Show Author's information Menglan Xiao1,6, Xueqin Yang2, Yue Peng4, Yucong Guo1, Yuechang Wei5, Maofa Ge1,3,6, Xiaolin Yu1,6( )
State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
School of Environment, Tsinghua University, Beijing 100084, China
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
University of Chinese Academy of Sciences, Beijing 100049, China

Abstract

Supported noble metal catalysts have the promising application in volatile organic compounds (VOCs) catalytic combustion but suffer from the deactivation due to noble metal sintering at high temperatures. Herein, we report the construction of shell-sandwiched MnO2-Ag-CeO2 hollow spheres with remarkable sintering resistance and high activity in toluene combustion. Ag clusters were sandwiched between outer MnO2 and inner CeO2 shell to enlarge and stabilize metal–support active interface. The unique hollow structure could alter the electronic states of catalysts sites and increase the adsorbed site of reactant molecules. Meanwhile, Mn–Ag–Ce multi-interfaces in MnO2-Ag-CeO2 could facilitate the sustainable activation and the stable release of oxygen species via a tandem transfer. The oxygen species at Ag–Mn interface perimeter were instantly replenished by Ag–Ce interface to accelerate a deep oxidation of intermediates, guaranteeing the opening of benzene ring to generate maleic anhydride. This investigation provides a promising method for constructing efficient and sintering-resistant cluster catalysts for VOCs oxidation.

Keywords: hollow spheres, multi-interfaces, toluene combustion, active lattice oxygen

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Publication history
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Acknowledgements

Publication history

Received: 26 January 2022
Revised: 23 March 2022
Accepted: 24 March 2022
Published: 25 April 2022
Issue date: August 2022

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This project was supported by the National Natural Science Foundation of China (Nos. 22076192, 22006032, 21777166, 42175133, and 21806169), and Beijing National Laboratory for Molecular Sciences (No. BNLMS-CXXM-202011), and the National Key Research and Development Program of China (No. 2016YFC0202202). The authors wish to thank facility support of the 4B9A beamline of Beijing Synchrotron Radiation Facility (BSRF).

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