Synthesis of sugar alcohols by hydrolytic hydrogenation of cellulose over supported metal catalystsElectronic supplementary information (ESI) available: Hydrogenation of sugars, yields of products and time course of temperature in Fig. 9, EDX analyses, curve fitting of the cellulose conversion to determine kG. See DOI: 10.1039/c0gc00666a

Cellulose is converted into sorbitol and related sugar compounds over water-tolerant and durable carbon-supported Pt catalysts under aqueous hydrogenation conditions. Pre-treatment of cellulose with ball-milling effectively reduces the crystallinity and particle size of cellulose, which results in high conversion of cellulose to sorbitol and mannitol. The selectivity of sorbitol increases by using Cl-free metal precursors in the catalyst preparation as residual Cl on the catalysts promotes the side-reactions. The transformation of cellulose to sorbitol consists of the hydrolysis of cellulose to glucose viawater-soluble oligosaccharides and the successive hydrogenation of glucose to sorbitol. The hydrolysis of cellulose is the rate-determining step, and the Pt catalysts promote both the hydrolysis and the hydrogenation steps. [ABSTRACT FROM AUTHOR]