TY - JOUR
T1 - Structure and performance relationship of silica-supported platinum-tungsten catalysts in selective C-O hydrogenolysis of glycerol and 1,4-anhydroerythritol
AU - Liu, Lujie
AU - Asano, Takehiro
AU - Nakagawa, Yoshinao
AU - Gu, Minyan
AU - Li, Congcong
AU - Tamura, Masazumi
AU - Tomishige, Keiichi
N1 - Funding Information:
Part of this work was supported by JSPS KAKENHI 18H05247 and 20H02519 , and the project was partially carried out on commission by Ministry of the Environment, Japan, as “Demonstration project for plastics resource circulation system for decarbonized society”. Lujie Liu acknowledges financial support from the China Scholarship Council (CSC). We also thank the Technical Division in the School of Engineering in Tohoku University for their assistance in TEM and XPS measurements.
Funding Information:
Part of this work was supported by JSPS KAKENHI18H05247 and 20H02519, and the project was partially carried out on commission by Ministry of the Environment, Japan, as “Demonstration project for plastics resource circulation system for decarbonized society”. Lujie Liu acknowledges financial support from the China Scholarship Council (CSC). We also thank the Technical Division in the School of Engineering in Tohoku University for their assistance in TEM and XPS measurements.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/9/5
Y1 - 2021/9/5
N2 - The relationship between structure and activity of Pt-WOx/SiO2 catalysts for selective cleavage of C[sbnd]O bond in glycerol and 1,4-anhydroerythritol was investigated. Characterization results showed that various types of W species were present depending on the W amount: W-Pt alloy, WOx species with low coordination numbers on Pt particle surface, submonolayer/monolayer on SiO2, and so on. In Pt-WOx/SiO2 (4 wt% Pt, W/Pt = 0.25) catalyst with the optimized W amount, WOx species (average valence of W: +4 from XAS) were located between Pt particles and SiO2 as shown by the disappearing W signal in XPS. These Pt-WOx interface sites can be the active site for the dissociation of C[sbnd]O bond. The interaction between Pt particles and WOx over non-pre-reduced catalyst can be further enhanced by the migration of high valent WOx species (+6) in the presence of water solvent to form the Pt-WOx interface between Pt particles and SiO2 more effectively.
AB - The relationship between structure and activity of Pt-WOx/SiO2 catalysts for selective cleavage of C[sbnd]O bond in glycerol and 1,4-anhydroerythritol was investigated. Characterization results showed that various types of W species were present depending on the W amount: W-Pt alloy, WOx species with low coordination numbers on Pt particle surface, submonolayer/monolayer on SiO2, and so on. In Pt-WOx/SiO2 (4 wt% Pt, W/Pt = 0.25) catalyst with the optimized W amount, WOx species (average valence of W: +4 from XAS) were located between Pt particles and SiO2 as shown by the disappearing W signal in XPS. These Pt-WOx interface sites can be the active site for the dissociation of C[sbnd]O bond. The interaction between Pt particles and WOx over non-pre-reduced catalyst can be further enhanced by the migration of high valent WOx species (+6) in the presence of water solvent to form the Pt-WOx interface between Pt particles and SiO2 more effectively.
KW - Heterogeneous catalysis
KW - Hydrogenolysis
KW - Platinum
KW - Tungsten
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U2 - 10.1016/j.apcatb.2021.120164
DO - 10.1016/j.apcatb.2021.120164
M3 - Article
AN - SCOPUS:85103330709
SN - 0926-3373
VL - 292
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 120164
ER -