title: Pt nanocatalysts supported on reduced graphene oxide for selective conversion of cellulose or cellobiose to sorbitol.
abstract: Pt nanocatalysts loaded on reduced graphene oxide (Pt/RGO) were prepared by means of a convenient microwave-assisted reduction approach with ethylene glycol as reductant. The conversion of cellulose or cellobiose into sorbitol was used as an application reaction to investigate their catalytic performance. Various metal nanocatalysts loaded on RGO were compared and RGO-supported Pt exhibited the highest catalytic activity with 91.5 % of sorbitol yield from cellobiose. The catalytic performances of Pt nanocatalysts supported on different carbon materials or on silica support were also compared. The results showed that RGO was the best catalyst support, and the yield of sorbitol was as high as 91.5 % from cellobiose and 58.9 % from cellulose, respectively. The improvement of catalytic activity was attributed to the appropriate Pt particle size and hydrogen spillover effect of Pt/RGO catalyst. Interestingly, the size and dispersion of supported Pt particles could be easily regulated by convenient adjustment of the microwave heating temperature. The catalytic performance was found to initially increase and then decrease with increasing particle size. The optimum Pt particle size was 3.6 nm. These findings may offer useful guidelines for designing novel catalysts with beneficial catalytic performance for biomass conversion.
authors.affiliation: School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093 (China); Department of Applied Chemistry, Graduate School of Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555 (Japan).
authors.forename: Ding
authors.initials: D
authors.lastname: Wang
authors.forename: Wenqi
authors.initials: W
authors.lastname: Niu
authors.forename: Minghui
authors.initials: M
authors.lastname: Tan
authors.forename: Mingbo
authors.initials: M
authors.lastname: Wu
authors.forename: Xuejun
authors.initials: X
authors.lastname: Zheng
authors.forename: Yanpeng
authors.initials: Y
authors.lastname: Li
authors.forename: Noritatsu
authors.initials: N
authors.lastname: Tsubaki
mesh_terms: D056804:Biofuels; D002384:Catalysis; D002475:Cellobiose / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*; D013012:Sorbitol / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D056804:Biofuels; D010087:Oxides; D002475:Cellobiose; D010984:Platinum; D013012:Sorbitol; D006108:Graphite; D002482:Cellulose
keywords: biomass; graphene oxide; hydrogen spillover effect; hydrogenation; sorbitol