New Type Of Metal Oxide Nano Noble Metal Catalyst Preparation,Structure And Catalytic Hydrogenation Performance

Tetravalent oxide nanomaterials is a new kind of inorganic functional materials. Due to its unique physical and chemical properties,it is widely used as catalyst support or directly used as catalyst.It is widely used in oxidation, photocatalytic, catalytic hydrogenation, catalytic domain. For example,several of the typical oxide nanomaterials are titanium dioxide, ceria, cubic zirconia, etc.Catalytic hydrogenation is basic and widely used in catalytic reaction system,it is one of the core issues in the field of catalytic science.Sorbitol was made by the main preparation methods of glucose hydrogenation in industry.Sorbitol is an application of a wide range of fine chemical products and industrial raw materials. Sorbitol has no smell, has a sweet taste, non-toxic, moisturizing, emulsification and excellent performance.It is a kind of important fine chemical products with high added value. Sorbitol and its products are widely used in cosmetics, food additives, tobacco, chemical, pharmaceutical and other industries.Because of its unique conjugated system and different products,α,β-unsaturated aldehydes has an very important position in modern chemical engineering field in nowadays.Cinnamaldehyde and Citral are the typical kinds of α,β-unsaturated aldehydes. Their hydrogenation products are widely used in many areas,such as herbs, spices,medicine and other related fields.So the study of catalytic hydrogenation has a very important realistic and research significance.In this paper,we respectively use single metal oxides and double metal oxides as the support,with Ru and Pt metal as the active component to get the catalysts.Then we study their hydrogenation performance in various reactions.The details are as follows:l.The synthesis of Ru/TiO2 catalyst and evaluate its catalytic performance.We use the proposed of kinetically controlled hydrothermal method and NaBH4 as the precipitating agent to synthesize tetragonal TiO2 metal oxide of which specific surface area is 215.8 m2 g-1.Then we use NaBH4 as the reducing agent to synthesize Ru/TiO2 catalyst.We apply it to the catalytic hydrogenation of glucose,evaluate its performance, obtain higher catalytic performance than the catalyst which loaded by traditional supports.2.The synthesis of high specific surface, high dispersion of Pt/CeO2-ZrO2 catalysts.We use the proposed of kinetically controlled hydrothermal method and NaBH4 as the precipitating agent without calcination to synthesize ZrO2-CeO2.Then we use NaBH4 as the reducing agent to synthesize the Pt/CeO2-ZrO2 catalysts and evaluate its performance of cinnamyl aldehyde hydrogenation.Its catalytic activity is significantly higher than Pt/CeO2 or Pt/ZrO2.By changing the proportion of ZrO2-CeO2, preparation of different Pt/ZrO2-CeO2 catalyst supports, the supports of ZrO2-CeO2 interact with Pt deposit is strong, significantly enhance the acid on the surface of the catalyst quantity and acid strength,increase the metal dispersion,the rich electronics of Pt0 and the C=O selectivity of cinnamaldehyde hydrogenation.