| 摘要 |
<p>A composition of matter comprising zirconia and Pt and/or Pd is prepared by a process comprising one step of treating Pt- and/or Pd-impregnated zirconia with a reducing gas, in particular free hydrogen, at a temperature of about 100-600 DEG C. Another composition of matter comprising zirconia and Pt and/or Pd is prepared by a process comprising the steps of impregnating a porous ceramic material (preferably a monolith) with a Zr compound, substantially decomposing the Zr compound to ZrO2, impregnating with Pt and/or Pd, drying/calcining, and reducing with a reducing gas, in particular free hydrogen, at a temperature of about 0-400 DEG C. Both compositions of matter are used as catalysts in a process for oxidizing CO to CO2, e.g., in a CO2 laser. Preferably, at least one iron compound is present as copromoter in these compositions of matter.</p> |
