NDLI: Nanoparticulate Pt on mesoporous SBA-15 doped with extremely low amount of W as a highly selective catalyst for glycerol hydrogenolysis to 1,3-propanediol

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Nanoparticulate Pt on mesoporous SBA-15 doped with extremely low amount of W as a highly selective catalyst for glycerol hydrogenolysis to 1,3-propanediol

Content Provider	Royal Society of Chemistry (RSC)
Author	Cheng, Shijie Ye, Danhong Qiao, Minghua Zong, Baoning Pei, Yan Hua, Weiming Hu, Huarong Li, Zhen Hua Xie, Songhai Fan, Yiqiu Wang, Hao
Copyright Year	2017
Abstract	It has been documented that W-modified Pt catalysts with relatively high tungsten contents are effective for the catalytic transformation of biodiesel-derived glycerol to 1,3-propanediol (1,3-PDO). Herein, we report a new finding that Pt/W–SBA-15 catalysts with extremely low W/Si atomic ratios (≤1/80) exhibit excellent catalytic performance in the hydrogenolysis of glycerol to 1,3-PDO. In particular, a Pt/W–SBA-15 catalyst with the W/Si ratio of as low as 1/640 (Pt/W–SBA-15(1/640)) gave rise to the highest 1,3-PDO selectivity of 70.8% at a high glycerol conversion of 86.8% and thus afforded the highest yield of 1,3-PDO of 61.5%. A combination of characterization techniques evidenced that tungsten was homogeneously incorporated into SBA-15 in the form of isolated tetragonal WO4 and only displayed Lewis acidity. The particle size of Pt evolved in a reverse volcanic curve with the W/Si ratio, with the smallest size being observed for Pt/W–SBA-15(1/640). Control experiments indicated strong synergy between Pt nanoparticles (NPs) and WO4 in the hydrogenolysis of glycerol. A probe reaction suggested that Brønsted acid sites were generated in situ on the Pt/W–SBA-15 catalysts in a H2 atmosphere by the reaction between WO4 and spillover H atoms from the Pt NPs. It is plausible that the hydrided WO4 functioned as a highly selective active centre in the hydrogenolysis of glycerol to 1,3-PDO, whereas the Pt NPs played the role of a reservoir of spillover H atoms. Thus, a good match between the isolated WO4 and the small Pt NPs was responsible for the superior catalytic performance of Pt/W–SBA-15(1/640).
Starting Page	2174
Ending Page	2183
Page Count	10
File Format	HTM / HTML PDF
ISSN	14639262
Volume Number	19
Issue Number	9
Journal	Green Chemistry
DOI	10.1039/c7gc00317j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Lewis Tungsten Glycerol 3-Propanediol Hydrogenolysis Tetragonal crystal system Petroleum reservoir
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution

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