| abstract |
A composition of matter comprising titania and Pt and/or Pd is prepared by a process comprising one step of heating Pt and/or Pd-impregnated titania with a reducing gas, in particular free hydrogen, at a temperature of about 300-800°C. Another composition of matter comprising titania and Pt and/or Pd is prepared by a process comprising the steps of coating a porous ceramic material (preferably a monolith) with colloidal TiO₂, drying, impregnation with Pt and/or Pd, drying/calcining, and reducing with a reducing gas, in particular free hydrogen, at a temperature of about 0-300°C. Both compositions of matter are used as a catalyst in a process for oxidizing CO to CO₂, e.g., in a CO₂ laser. |