| Title: | Boosting benzene combustion by engineering oxygen vacancy-mediated Ag/CeO(2)-Co(3)O(4) catalyst via interfacial electron transfer |
| Author(s): | Ma X; Xiao M; Yang X; Yu X; Ge M; |
| Address: | "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, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China. College of Forestry, Henan Agricultural University, Zhengzhou 450002, PR China. 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, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China. Electronic address: icecoolyu@iccas.ac.cn. 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, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, PR China" |
| DOI: | 10.1016/j.jcis.2021.03.076 |
| ISSN/ISBN: | 1095-7103 (Electronic) 0021-9797 (Linking) |
| Abstract: | "Oxygen vacancy (O(v)) engineering is a widely accepted effective strategy to manipulate the catalytic activity for volatile organic compounds (VOCs) abatement. Herein, we report the oxygen vacancy-mediated Ag/CeO(2)-Co(3)O(4) catalyst to boost benzene combustion. The incorporation of Ag species in Ag/CeO(2)-Co(3)O(4) induces the predominately exposed surface Co(3+) sites and structural distortion of Co(3)O(4) as well as rich oxygen vacancy owing to the improved interfacial electron transfer, which promote the adsorption of benzene and the dissociation of oxygen. The low-temperature reducibility and mobility of oxygen species are also improved due to the generation of oxygen vacancy. The isotopic (18)O(2) exchange experiments demonstrate that abundant oxygen vacancies contribute to the rapid generation of active oxygen species, and the consumed oxygen vacancies can be compensated steadily during benzene oxidation. In-situ DRIFTS results reveal that benzene oxidation is a continuous oxidation process, and active oxygen species plays a crucial role in the deep oxidation of benzene by engineering oxygen vacancy. This work provides an efficient strategy for designing high-performance environmental catalysts for VOCs abatement" |
| Keywords: | Active oxygen species Ag/CeO(2)-Co(3)O(4) Benzene combustion Interfacial electron transfer Oxygen vacancies; |
| Notes: | "PubMed-not-MEDLINEMa, Xiuyun Xiao, Menglan Yang, Xueqin Yu, Xiaolin Ge, Maofa eng 2021/04/02 J Colloid Interface Sci. 2021 Jul 15; 594:882-890. doi: 10.1016/j.jcis.2021.03.076. Epub 2021 Mar 20" |
