III International Conference

PP-II-162NOBLE METAL MODIFIED CARBON CATALYSTS FOR LIQUID PHASEOXIDATION OF GLUCOSEBöhme K. 1 , Scholz J. 1, 2 , Klepel O. 1 , Dänhardt K. 1, 31 Institute of Technical Chemistry, University of Leipzig, Linnéstr. 3, D-04103 Leipzig, Germany2 Department of Chemistry, University of Otago, PO Box 56, Dunedin, New Zealand3 Department of Chemistry, Technical University Munich, Lichtenbergstraße 4, D-85747Garching, GermanyE-mail: boehmekerstin@web.deIntroductionCarbon materials are attractive catalyst supports in liquid phase oxidation reactionsdue to their enhanced stability in acidic and alkaline media, particularly, in comparison toother common support materials such as SiO 4 and Al 2 O 3 . Furthermore, for metal-modifiedcarbons recovery and recycling of the expensive metal compounds can be easilyaccomplished by burning off the support [1]. The textural and surface chemical propertiesof carbon materials commonly used are not well defined, as their preparation is difficult tocontrol. Consequently, there is lasting interest to develop innovative routes to preparecarbons with defined properties. In particular, template assisted routes turned out to be apromising method, since porous materials like silica or zeolites have been applied as solidtemplates preparing such carbon materials [2-4]. Firstly, the template pores will be filledwith carbon precursor followed by carbonization within the template pore system.Treatment with hydrofluoric acid to remove the template yields a carbon replica. So,textural, structural and morphological properties of the template can be transferred intothe final carbon material. Metal loading of carbon supports is typically performed viaimpregnation followed by reduction of the noble metal precursor in presence of gaseous orliquid reducing agents. Though preparation of such materials still includes many costintensiveand above all time-consuming synthesis steps.Thus, shortening preparation of noble metal doped materials a direct synthesis ofnoble metal doped carbons was applied, however, based on the template assisted route,too. At the same time, carbon supported metal catalysts were prepared by impregnation of464