| Abstract Scope |
In heterogeneous catalysis, metal catalysts supported on different oxides have distinct catalytic properties, depending on the reducibility of oxides, surface acidity and basicity of oxides, and metal-oxide interaction/reaction. Charge transfer and/or redox reactions are essential steps for the catalytic reaction at elevated temperature, therefore the reducible oxide supports (CeO2, TiO2, and VOx) present a potential advantage compared to conventional non-reducible oxide supports, e.g. SiO2, ZrO2, and Al2O3. In addition, the morphology and surface structure of reducible oxides are critical in altering the metal-support interactions, hence determining the catalytic activity, selectivity and durability. In this presentation, we highlight three synthetic approaches towards shape-controlled synthesis and fine tuning of surface structure in various oxide support nanopowders, including hydrothermal method, electrospinning and electrochemical deposition. By regulating different reaction parameters, mono-dispersed and shape well-defined oxide nanopowders can be obtained for the application in emission control catalysts. |