Ceria-based mixed-metal oxide structure, including method of making and use

摘要: A homogeneous ceria-based mixed-metal oxide, useful as a catalyst support, co-catalyst and/or getter has relatively large surface area per weight, typically exceeding 150 m 2 /g, structure of nanocrystallites having diameters less than 4 nm, and including pores larger the in range to about 9 nm. The ratio pore volumes, V P , skeletal S is 2.5, unit volume oxide material greater 320 /cm 3 for low internal mass transfer resistance effective reaction activity. mixed metal ceria-based, includes Zr or Hf, made by novel co-precipitation process. highly dispersed metal, noble such Pt, may be loaded on support from metal-containing solution following selected acid treatment support. Appropriate ratioing Ce other constituents contribute it retaining cubic phase enhancing catalytic performance. Rhenium preferably further passivated, increase activity catalyst. metal-loaded applied particularly water gas shift reactions associated with fuel processing systems, cells.