Single site of water-resistant asymmetric Bi–Ov–Mn for robust VOC ozonation at ambient temperature

Manipulating the geometries and electronic structures of oxygen vacancies (Ovs) in oxides to increase their catalytic activity has been a critical focus of research, but the processes remain challenging, particularly because of the significant interference caused by ubiquitous water vapour. In this work, we employ a nanocrystal-to-crystal transformation methodology to integrate a single atom of bismuth (Bi) into MnO<sub>2</sub>, resulting in the formation of Bi-Ov-Mn entities. This single site reduces the formation energy of ˙OOOH species, facilitating the formation of reactive oxygen species (ROS), particularly ˙OH, due to the nonuniform electron distribution in the presence of both ozone and water. Therefore, this unique asymmetric defective linkage provides excellent water vapour resistance (1.8 vol%), which significantly improves its performance in the removal of volatile organic compounds. In this study, a pioneering paradigm utilizing asymmetric active sites is introduced, which expands the potential of catalytic ozonation for VOC abatement.

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Publication Details

Journal
Chemical Science
Published
2025-01-01
DOI
https://doi.org/10.1039/d5sc06166k
Primary Topic
Catalytic Processes in Materials Science
Type
article
Field-Weighted Citation Impact
0.00

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article

Single site of water-resistant asymmetric Bi–Ov–Mn for robust VOC ozonation at ambient temperature

Hua Deng, Huayang Zhang, Yuqin Lu, Joseph S. Francisco et al.
Chemical Science
Catalytic Processes in Materials Science
article

Single site of water-resistant asymmetric Bi–Ov–Mn for robust VOC ozonation at ambient temperature

Hua Deng, Huayang Zhang, Yuqin Lu, Joseph S. Francisco, Wenjie Tian, Wenpo Shan, Shaobin Wang, Jianguo Ding, Tingting Pan, Hong He, Changbin Zhang, Yunbo Yu
article en

Abstract

Manipulating the geometries and electronic structures of oxygen vacancies (Ovs) in oxides to increase their catalytic activity has been a critical focus of research, but the processes remain challenging, particularly because of the significant interference caused by ubiquitous water vapour. In this work, we employ a nanocrystal-to-crystal transformation methodology to integrate a single atom of bismuth (Bi) into MnO<sub>2</sub>, resulting in the formation of Bi-Ov-Mn entities. This single site reduces the formation energy of ˙OOOH species, facilitating the formation of reactive oxygen species (ROS), particularly ˙OH, due to the nonuniform electron distribution in the presence of both ozone and water. Therefore, this unique asymmetric defective linkage provides excellent water vapour resistance (1.8 vol%), which significantly improves its performance in the removal of volatile organic compounds. In this study, a pioneering paradigm utilizing asymmetric active sites is introduced, which expands the potential of catalytic ozonation for VOC abatement.

Chemical ScienceVol. 16(48)
Chinese Academy of Sciences (CN), Institute of Urban Environment (CN), Research Center for Eco-Environmental Sciences (CN), University of Chinese Academy of Sciences (CN), The University of Adelaide (AU), University of Pennsylvania (US), Ludwig-Maximilians-Universität München (DE)
National Natural Science Foundation of China, Natural Science Foundation of Fujian Province
Openalex Percentile: Top 75%
Catalytic Processes in Materials Science
DOIOpen Access PDFOpenAlex
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