THE STRUCTURE OF ZIRCONIUM-SILICATE FIBERGLASSES AND Pt-CONTAINING FIBERGLASS CATALYSTS AS REVEALED BY SOLID-STATE NMR SPECTROSCOPY
O. B. Lapina1,2, D. F. Khabibulin1,2, E. S. Papulovskiy1,2, A. A. Shubin1,2, Yu. K. Gulyaeva1
1G. K. Boreskov Institute of Catalysis, Siberian Division, Russian Academy of Sciences
2Novosibirsk State University
Keywords: solid-state NMR spectroscopy, silicate fiberglass, NMR spectroscopy techniques, quantum-chemical calculations, DFT/GGA PBE
Abstract
1H, 23Na and 29Si solid-state NMR spectroscopy was used to investigate the formation of fiberglass zirconium-silicate supports and catalysts (glass → fiberglass → leached fiberglass → catalyst). The main emphasis was made on OH–H2O domains in fiberglass and their role in catalyst preparation. The size of OH–H2O domains and their accessibility to H–D exchange were determined. Platinum was shown to be anchored on the bridging hydroxyl groups. The quantum-chemical calculations demonstrated the activity of Pt0 clusters forming in fiberglass to depend on their nuclearity.
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