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Tuning the Chemical State of Silver on Ag-Mn Catalysts to Enhance the Ozone Decomposition Performance
Li, Xiaotong; Ma, Jinzhu; He, Hong
2020-09-15
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume54Issue:18Pages:11566-11575
AbstractAg-Mn catalysts with excellent water resistance and ozone decomposition activity were successfully synthesized by simple precipitation and impregnation methods. Under a relative humidity of 65% and space velocity of 840,000 h(-1), the 6%Ag/alpha-Mn2O3-I catalyst showed 99% conversion of 40 ppm O-3 after 6 h, which was far superior to the performance of the 6% AgMnOx-C (49%), 6%Ag/MnCO3-I (32%), and alpha-Mn2O3 (5%) catalysts. Physicochemical characterization indicated that the chemical state of Ag on the Ag-Mn catalysts determined the O-3 decomposition activity of the catalysts. The Ag species on the 6%Ag/alpha-Mn2O3-I catalyst were mainly metallic silver nanoparticles (Ag-n(0)), which exhibited much better ozone decomposition performance than the Ag1.8Mn8O16 and oxidized silver clusters (Ag-n(delta+)) existing on the 6%Ag/MnCO3-I and 6%AgMnOx-C catalysts. The 6%Ag/alpha-Mn2O3-I catalyst still had above 85% ozone conversion after 60 h under a relative humidity of 65% and space velocity of 840,000 h(-1). The slight deactivation of the catalyst was ascribed to the oxidation of Ag-n(0), and its activity could be completely recovered by treatment at 350 degrees C under an N-2 atmosphere, which indicated that it is a promising catalyst for ozone decomposition. This research provides guidance for the subsequent development of Ag-Mn catalysts for ozone decomposition with high activity.
Department大气环境与污染控制实验室
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/45107
Collection大气环境与污染控制实验室
Recommended Citation
GB/T 7714
Li, Xiaotong,Ma, Jinzhu,He, Hong. Tuning the Chemical State of Silver on Ag-Mn Catalysts to Enhance the Ozone Decomposition Performance[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2020,54(18):11566-11575.
APA Li, Xiaotong,Ma, Jinzhu,&He, Hong.(2020).Tuning the Chemical State of Silver on Ag-Mn Catalysts to Enhance the Ozone Decomposition Performance.ENVIRONMENTAL SCIENCE & TECHNOLOGY,54(18),11566-11575.
MLA Li, Xiaotong,et al."Tuning the Chemical State of Silver on Ag-Mn Catalysts to Enhance the Ozone Decomposition Performance".ENVIRONMENTAL SCIENCE & TECHNOLOGY 54.18(2020):11566-11575.
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