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Hydrogenolysis of Glycerol to 1,3‐propanediol under Low Hydrogen Pressure over WO x ‐Supported Single/Pseudo‐Single Atom Pt Catalyst
Author(s) -
Wang Jia,
Zhao Xiaochen,
Lei Nian,
Li Lin,
Zhang Leilei,
Xu Shutao,
Miao Shu,
Pan Xiaoli,
Wang Aiqin,
Zhang Tao
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201501506
Subject(s) - hydrogenolysis , catalysis , heterolysis , chemistry , dissociation (chemistry) , propanediol , platinum , space velocity , dehydrogenation , selectivity , photochemistry , inorganic chemistry , medicinal chemistry , organic chemistry
Abstract Single/pseudo‐single atom Pt catalyst was prepared on mesoporous WO x . The large surface area and abundant oxygen vacancies of WO x improve the Pt dispersion and stabilize the Pt isolation. This newly prepared catalyst exhibited outstanding hydrogenolysis activity under 1 MPa H 2 pressure with a very high space–time yield towards 1,3‐propanediol (3.78 g g Pt −1 h −1 ) in Pt–W catalysts. The highly isolated Pt structure is thought to contribute to the excellent H 2 dissociation capacity over Pt/WO x . The high selectivity towards 1,3‐propanediol is attributed to the heterolytic dissociation of H 2 at the interface of Pt and WO x (providing specific Brønsted acid sites and the concerted dehydration–hydrogenation reaction) and the bond formation between glycerol and WO x , which favors/stabilizes the formation of a secondary carbocation intermediate as well as triggers the redox cycle of the W species (W 6+ ⇄W 5+ ).