Research On Effect Of Catalyst Morphology And Doping Carbon Nanotubes For The Catalytic Properties Of Copper-Ceria Catalyts

CO preferential oxidation (CO-PROX) reaction has been considered as the ideal method for eliminating CO in feed gas of fuel cell. Non-noble copper-cerium catalysts have practical application value as they own high CO conversion and CO2 selectivity.This paper parepared multishell hollow CeO2/CuO microbox catalysts and eggshell CeO2/xCNTs-CuO catalysts to explore the improved effect of morphology, structure and doping CNTs. The multi-technique characterizations were employed in order to study physical and chemical properties, such as SEM, TEM/HRTEM, XRD, H2-TPR, N2-adsorption-desorption and XPS, results are list as follows:1. Multishell hollow CeO2/CuO microbox was synthesized by a impregnation method. The alternate CuO and CeO2 multishell structure reduces the agglomeration of CuO species and improves the dispersion of CeO2. The special structure ensures even distribution of the two species in the material matrix and the optimum ratio of CeO2 to CuO provides two-component active sites with high concentration.2. Based on above study, CeO2/CuO catalysts using different template agent containing different amount hydrophilic group were prepared to figure out its influence on BET of CeO2/CuO catalysts.3. The CeO2/xCNTs-CuO composite catalysts were prepared, CeO2 particles uniformly dispersed onto the surface of xCNTs-CuO support to compose an eggshell structure. With increasing CNTs content, there is an increase in Ce3+ and Olatt concentration. The CNTs play an improvement role on catalytic performance and resistance against CO2 and H2O.