Insight into the Influence of WOx-Support Interaction over Pt/W/SiZr Catalysts on 1,3-Propanediol Synthesis from Glycerol

For Pt-WOx-based catalysts, researchers pay much attention to study the influence of Pt-WOx interaction on glycerol hydrogenolysis, ignoring the interaction between WOx and support. Herein, four Pt/W/SiZr-T catalysts with different surface hydroxyl groups on support are prepared and characterized. The results show that bibridged (OHII) and tribridged hydroxyl groups (OHIII) on SiZr-T supports could react with WOx species through forming Zr-O-W bands and retard the agglomeration of WOx species. The highly dispersed WOx species and Zr-O-W bands are the origination of inherent and in-situ generated Bronsted acid, which are beneficial for 1,3-propanediol synthesis. As a result, Pt/W/SiZr-70 exhibits outstanding performance due to abundant OHII and OHIII on SiZr-70. The initial space time yield of 1,3-propanediol on Pt/W/SiZr-70 reaches 2.280 g(1,3-PDO) . g(cat)(-1) . h(-1), the highest among reported results. This r esearch reveals the role of WOx-support interaction on glycerol hydrogenolysis and provides a new direction to design Pt-WOx-based catalysts for selective hydrogenation reactions.