SKM 2023 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 37: Topical Session: Defect Phases II
MM 37.2: Vortrag
Donnerstag, 30. März 2023, 10:45–11:00, SCH A 216
The synthesis and studies of unique oxygen structure on silica-aluminate catalysts — •Linfeng Su1, Xu Chen2, Huaping Zhao1, Zhiyi Lu2, and Yong Lei1 — 1Fachgebiet Angewandte Nanophysik, Institut für Physik & IMN MacroNano, Technische Universität Ilmenau, 98693 Ilmenau, Germany — 2Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, CAS, Zhejiang, 315201, PR China
To promote the application of silica-aluminate catalysts in catalytic reactions, the unique active oxygen structures on the surface of silica-aluminate were investigated. 4A molecular sieves were prepared with oxygen-rich vacancies of various contents and different chemical environments. Three different types of oxygen vacancies (due to the covalent and coordination bonds of O) on the surface have different mechanisms in catalytic reactions, and the specific structures exhibit the best catalytic activity (87.5% removal rate of pollutants within 6 min in catalytic ozonation). Moreover, silica-aluminate mullite containing abundant neo-oxygen structure (unique bridging oxygen) was successfully prepared at a low preparation temperature. The abundant oxygen structure in silica-aluminate leads to abundant unique bridging oxygen structures with high catalytic activities (81.2% removal rate of pollutants within 15 min under low ozone concentration). The research on the unique oxygen structure of silicate-aluminate provides theoretical guidance for the design and synthesis of catalysts with high catalytic activities for future industrial applications.