Abstract
AbstractIn glycerol hydrogenolysis, WOx and ReOx catalysts have been investigated widely because of their importance for the selectivity of 1,3‐propanediol, but few studies have focused on hydrogen spillover. In this work, the hydrogen spillover effect on the catalytic performance was investigated for a series of Pt/WO3/ZrO2 nanocatalysts. The spillover capacities were tuned by changing the tetragonal/monoclinic ZrO2 composition and thermal treatment conditions of the Pt precursor. H2/O2 titration and X‐ray photoelectron spectroscopy (XPS) confirm that all of the catalysts present a uniform Pt dispersion and a similar surface electron environment. Diffuse reflectance infrared Fourier transform spectra of adsorbed CO and H2 chemisorption reveal the strong correlation between the amount of Pt(1 1 1) terraces and the spillover capacities. We demonstrate that the reaction rate is influenced by hydrogen spillover, but not the acid amount or acid strength of the catalysts in this case. The important roles of Pt(1 1 1) and WO3 in the spillover process are discussed.
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