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- W3015404261 abstract "The soaring pressure on clean environment urges for high-performance and robust catalysts in water treatment to secure the sustainability of water resources. In this work, shape-controlled perovskites La0.5Ba0.5CoxMn1-xO3-δ (LBCxM1-x) were applied as peroxymonosulfate (PMS) activators to generate reactive oxygen species (ROS) for water purification. Owing to the presence of abundant oxygen vacancies and low-valence Co2+ cations, cubic-shaped LBC0.8M0.2 exhibited a much higher catalytic activity than octahedral LBC0.2M0.8 with a better structural stability and controlled metal leaching. Iodometric titration and solid electron paramagnetic resonance (EPR) validated that an increase of Co/Mn ratios would produce abundant oxygen vacancies as active sites to bond with and activate PMS molecules, facilitated by the redox couples of Co2+/Co3+ and Mn3+/Mn4+. Competitive radical tests and in-situ EPR spectra suggested that SO4•− was the dominant ROS. This study provides new insights into the structure-performance relationship of shape- and defect-dependent perovskites in environmental catalysis." @default.
- W3015404261 created "2020-04-17" @default.
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- W3015404261 date "2020-09-01" @default.
- W3015404261 modified "2023-10-14" @default.
- W3015404261 title "Facet- and defect-dependent activity of perovskites in catalytic evolution of sulfate radicals" @default.
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- W3015404261 doi "https://doi.org/10.1016/j.apcatb.2020.118972" @default.
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