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

Abstract

For Pt-WO x -based catalysts, researchers pay much attention to study the influence of Pt-WO x interaction on glycerol hydrogenolysis, ignoring the interaction between WO x 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 (OH II ) and tribridged hydroxyl groups (OH III ) on SiZr-T supports could react with WO x species through forming ZrÀ OÀ W bands and retard the agglomeration of WO x species. The highly dispersed WO x species and ZrÀ OÀ W bands are the origination of inherent and in-situ generated Brønsted acid, which are beneficial for 1,3-propanediol synthesis. As a result, Pt/W/SiZr-70 exhibits outstanding performance due to abundant OH II and OH III 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 À 1 • h À 1 , the highest among reported results. This r esearch reveals the role of WO x -support interaction on glycerol hydrogenolysis and provides a new direction to design Pt-WO x -based catalysts for selective hydrogenation reactions.

The influence of hydrogen bonding on the structure of organic–inorganic hybrid catalysts and its application in the solvent-free epoxidation of α-olefins

“…5. Following the peaks separation method described by Zhao, et al 42 Fig. 5b revealed the fitting of the W element in the catalyst into five distinct W 4f peaks.…”

Advances for Biorefineries: Glycerol Hydrogenolysis to 1,3-Propylene Glycol

“…With the aim of improving the catalytic properties, modifications of Pt/WO x /ZrO 2 catalysts including the use of SiO 2 [112,124], TiO 2 [125], Li 2 B 4 O 7 [126], Mn [111], Mg [127], and P [113] have been reported.…”

“…Zhao et al proved that the presence of bibridged (OH II ) and tribridged hydroxyl groups (OH III ) on the SiO 2 /ZrO 2 support could react with WO x species forming Zr-O-W bands and retarding the agglomeration of WO x species. The high dispersion of WO x species in conjunction with Zr-O-W bonds benefit the formation of Brønsted acid sites that promote the formation of 1,3-PG [112].…”