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Indexed by:期刊论文

Date of Publication:2017-02-01

Journal:ACS SUSTAINABLE CHEMISTRY & ENGINEERING

Included Journals:SCIE、EI、ESI高被引论文

Volume:5

Issue:2

Page Number:1538-1548

ISSN No.:2168-0485

Key Words:Ru catalyst; Covalent functionalization; Hydrogenation; Dehydration; Biomass

Abstract:A facile strategy was developed for the preparation of Ru nanoparticles supported on reduced graphene oxide (Ru/rGO) and its following functionalization with benzenesulfonic acid groups (Ru/rGO-S). The formation of a C-C bond between p-sulfophenyl and sp(2) carbon of graphene can be unambiguously confirmed by XPS quantitative analysis. The two catalysts were used to catalyze the conversion of levulinic acid in aqueous phase, which is an important reliable analysis method for this reaction. Both of the catalysts reaction during biorefinery. Not GC but HPLC was found to be the exhibited high hydrogenation activities under mild reaction conditions (50 degrees C, 2 MPa), although their selectivities were different. The hydrogenated. intermediate 4-hydroxyvaleric acid could be accumulated over Ru/rGO with a yield of 82% in 40 min, but the main product over Ru/rGO-S was gamma-valerolactone (a yield of 82% within the same time) due to the accelerated dehydration process by hydrogenation activities of Ru in each catalyst and dehydration ability of SO3H could be well kept. This effective method could be a general way to prepare graphene-based bifunctional catalysts, which are expected to have broad application prospects in biomass conversion.