CVD of Pt(C5H9)2 to Synthesize Highly Dispersed Pt/SBA-15 Catalysts for Hydrogenation of Chloronitrobenzene†

Abstract

Pt supported on mesoporous silica SBA-15 materials with various loadings are controllably synthesized by metal-organic(MO)CVD of Pt(C₅H₉)₂ in a Y-tube reactor. The precursor, Pt(C₅H₉)₂, is successfully prepared by the reaction of dichloro(1,5-cyclooctadiene)platinum ((COD)PtCl₂) with pent-4-en-1-ylmagnesium bromide, which is confirmed by proton nuclear magnetic resonance (¹H-NMR). Transmission electron microscopy (TEM) images show that Pt nanoparticles with an average size of 4.6 ± 1.1 nm are dispersed uniformly onto the SBA-15. The performance of Pt/SBA-15 for the hydrogenation of o-chloronitrobenzene (o-CNB) is tested, and is able to achieve high catalytic activity (97%) and selectivity (72%).