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- Title
Cooperative Surface Passivation and Hierarchical Structuring of Zeolite Beta Catalysts.
- Authors
Han, Sungmin; Linares, Noemi; Terlier, Tanguy; Hoke, Jeffrey B.; García Martínez, Javier; Li, Yuejin; Rimer, Jeffrey D.
- Abstract
We report a method to prepare core–shell zeolite beta (*BEA) with an aluminous core and an epitaxial Si‐rich shell. This method capitalizes on the inherent defects in *BEA crystals to simultaneously passivate acid sites on external surfaces and increase intracrystalline mesoporosity through facile post‐hydrothermal synthesis modification in alkaline media. This process creates more hydrophobic materials by reducing silanol defects and enriching the shell in silica via a combination of dealumination and the relocation of silica from the core to the shell during intracrystalline mesopore formation. The catalytic consequences of *BEA core–shells relative to conventional analogues were tested using the biomass conversion of levulinic acid and n‐butanol to n‐butyl levulinate as a benchmark reaction. Our findings reveal that siliceous shells and intracrystalline mesopores synergistically enhance the performance of *BEA catalysts.
- Subjects
ZEOLITE catalysts; SURFACE passivation; BIOMASS conversion; CRYSTAL defects; MESOPORES
- Publication
Angewandte Chemie, 2022, Vol 134, Issue 41, p1
- ISSN
0044-8249
- Publication type
Academic Journal
- DOI
10.1002/ange.202210434