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- W3185431483 abstract "MnO2 catalysts have been widely studied for catalytic gaseous ozone decomposition. However, their poor moisture resistance often leads to undesirable catalytic effects in the presence of high humidity. In this study, a novel catalyst with γ-like MnO2 was synthesized using the selective dissolution method on LaMnO3 perovskites. The as-prepared catalyst exhibited quite stable ozone conversion of ~90% within 12 h under 75% relative humidity (400–800 ppm of ozone, 30 °C, 150 000 mL·g−1·h−1 of WHSV). In contrast, traditional γ-MnO2 catalyst showed deficient resistance to H2O and sensitivity to space velocity. Detailed characterizations showed that the larger number of oxygen vacancies induced by structure reconstruction of the γ-like MnO2 and residual La3+ cations facilitated ozone decomposition in humid atmosphere. Finally, the reaction rate of ozone decomposition was proposed by a kinetic study, which further proved that the amount and hydrophilicity of oxygen vacancies are the determinants of the first-order reaction rate constant." @default.
- W3185431483 created "2021-08-02" @default.
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- W3185431483 date "2021-10-01" @default.
- W3185431483 modified "2023-10-16" @default.
- W3185431483 title "A novel γ-like MnO2 catalyst for ozone decomposition in high humidity conditions" @default.
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- W3185431483 doi "https://doi.org/10.1016/j.jhazmat.2021.126641" @default.
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