Enhancing Ozone catalytic decomposition through acid treatment of α-MnO2 for improved activity and humidity resistance

Shangchao Xiong,Kai Zhang,Zhenghao Xu,Hongjun Ou,Yuanyuan Zheng,Xi Li,Yue Peng,Xubiao Luo,Junhua Li

Journal of Environmental Sciences（2023）

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摘要

•α-MnO2 synthesized by grinding method shows excellent O3 decomposition activity.•Nitric acid treatment further improves the activity and water resistance of α-MnO2.•Nitric acid treatment enhances the content of O vacancies and Brønsted acid sites.•O3 adsorbed on O vacancies forms H-bond with the protonic H of Brønsted acid sites.•The H-bond accelerates the cleavage of O3 to O2.

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关键词

Ozone decomposition,α-MnO2,Brønsted acid sites,H-bonds,Post-etching

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