Comparing catalytic properties of copper loaded CeO2 and SnO2 oxides catalysts for CO oxidation

Catalytic properties of systems composed of copper loaded CeO2 and SnO2 were examined. Catalysts were prepared using a conventional impregnation method. After preparation the samples were calcined in oxygen respective reduced in hydrogen. Treatments were carried out at 400 degrees C resp. 300 degrees C for 2 hours. The amount of copper in prepared samples was 8 at. % in both cases. Morphology and particle size were observed using Scanning Electron Microscopy (SEM). Crystal phases were characterized by X-Ray Diffraction method (XRD). The CO oxidation reaction was performed in a flow micro-reactor in the mixture of He, O-2 and CO, where the catalyst was deposited on a silicon oxide chip ensuring a very reliable catalyst temperature control. It can be expected that nano-structured copper loaded oxide catalysts could be used for removing CO produced in a wet reforming reaction for fuel cell applications.