Abstract
Support effect for the catalytic activity of liquid phase reforming of methanol with water was investigated over various supported Pt–Ru bimetallic catalysts. The SiO 2, TiO 2, Al 2O 3, MgO, CeO 2 and ZrO 2 were used as support materials by conventional impregnation method. Basic oxide supports improved the selectivity to CO 2, whereas acidic supports suppressed the catalytic activity and selectivity. The Pt–Ru/TiO 2 catalyst exhibited highest activity and selectivity for CO 2, which were improved by higher temperature reduction. The improved activity and selectivity were attributable to the occurrence of SMSI state and Pt–Ru alloy, respectively. The reforming reaction over Pt–Ru/TiO 2 catalyst proceeded through partially dehydrogenated HCOOCH 3 and HCOOH intermediate with the similar mechanism as that over SiO 2 supported Pt–Ru catalyst.
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