Formation of Charge-Reduced Si⁴⁺ Species in SiO₂ Thin Film by Supported Metal Particles - Possibility of Electronic Metal-Suppo rt Interaction in Silica-Supported Metal Catalysts -

Abstract

Metal-support interaction (MSI) in catalysts supported on silica was studied with model catalyst sys tems in which metal particles were deposited on a thin film silica surface. X-Ray photoelectron spectroscopy on these model catalyst surfaces revealed the formation of charge-reduced Si⁴⁺ species due to the deposition of metal particles. The amount of the charge-reduced Si⁴⁺ species paralleled the amount of the metal deposited on the surface.