Small Pd nanoparticles have poor stability and they tend to aggregate during the thermal treatment,which lead to the decrease of activity.In this thesis,based on hierarchically porous TiO_2 support,Au-Pd nanoparticles were prepared via impregnation method.The catalysts were characterized by TEM and XRD.The obtained Au-Pd nanoparticles were uniformly dispersed on the support with a narrow size distribution at 3-5 nm.CO oxidation were chosen to test the influence of Au-Pd molar ratios on catalytic activities....
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