点击次数：

论文类型：期刊论文

发表时间：2017-02-01

发表刊物：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录刊物：SCIE、EI、ESI高被引论文

卷号：5

期号：2

页面范围：1538-1548

ISSN号：2168-0485

关键字：Ru catalyst; Covalent functionalization; Hydrogenation; Dehydration; Biomass

摘要：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.