The Ce-modified Cu/HAp catalyst was prepared by successive deposition and co-precipitation methods and investigated for propene oxidation as a model component of diesel engine exhaust and VOC. The Cu0.4/Ce0.1/HAp catalyst prepared by successive deposition showed better performance than the Cu0.4-Ce0.1/HAp catalyst prepared by the coprecipitation method. Furthermore, Ce concentration has been optimized using successive deposition methods. The catalyst was modified with 0.4 mol Cu and 0.1 mol Ce deposited on HAp and tested for CO, propene, and toluene oxidation. All catalysts were characterized by P-XRD, BET, Raman, XPS, ATR-FTIR, H2-TPR, FESEM, and HR-TEM techniques. The formation of facile CuOx species with more Ce3+ and adsorbed oxygen was observed in the Cu0.4/Ce0.1/HAp catalyst. These species are responsible for the oxidation of propene at lower temperatures compared to the remaining catalyst.
More et al. (Fri,) studied this question.