Abstract
Catalytic decomposition is a promising method of ozone (O 3 ) removal, and Ag-based catalysts have shown excellent O 3 decomposition performance. In this study, the chemical states of Ag species were successfully regulated by varying the loading of Ag and the particle size of α-Fe 2 O 3 supports, and the O 3 decomposition performance of different Ag species (monatomic Ag, Ag clusters (1–2 nm), small Ag nanoparticles (3–5 nm), large Ag nanoparticles (7–12 nm)) was determined. The changes undergone by Ag species after exposure to ozone were characterized in detail, and the ozone decomposition performance of the corresponding Ag species was determined. The terminal and doubly bridging hydroxyl groups on the Fe 2 O 3 support were determined to be the anchoring sites for Ag species. The Ag species and Fe 2 O 3 support are connected through oxygen bridges, forming Ag-O-Fe linkages. This study provides guidance for understanding the mechanism of the interaction between metals and supports and follow-up development of high-efficiency Ag-based catalysts. • The terminal and doubly bridging hydroxyl groups are the anchoring sites of Ag. • The Ag species are anchored on the Fe 2 O 3 support by Ag-O-Fe linkages. • Small Ag nanoparticles and highly dispersed Ag n δ+ are good active sites for O 3 decomposition.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call