Formation of Platinum Silicide on a Platinum Nanoparticle Array Model Catalyst Deposited on Silica during Chemical Reaction

Pt nanoparticle model catalysts with 28 ± 2 nm diameters and 100 ± 2 nm square periodicity have been fabricated with electron beam lithography on silica substrates. The reactivity and selectivity of the Pt/SiO2 array favor dehydrogenation for a cyclohexene and hydrogen mixture to hydrogenation at 100 °C. Experiments with silicon deposited on Pt foil reveal the feasibility of platinum silicide formation at the Pt/SiO2 interface under reaction condition.