Abstract: A new technique, the microemulsion method, for depositing CuO-CeO2 on FeCrAl honeycomb supports was described. Adhesion stability of the monolithic catalyst was tested via ultrasonic and thermal shock experiments. The monolithic catalyst was characterized by scanning electron microscopy,X-raydiffraction, andX-rayphotoelectron spectroscopy. The results showed that CuO-CeO2 could be loaded on the FeCrAl honeycomb supports with good adhesion stability by the microemulsion method. CuO-CeO2 was in a nanoparticle form and was homogeneously dispersed on the surface of the supports. The supports had no obvious influence on the chemical states of the catalyst. The CuO-CeO2/Al2O3/FeCrAl monolithic catalyst was used in the preferential oxidation of CO in hydrogen-rich gases and exhibited good activity, high selectivity, and good stability.

Key words: copper oxide, ceria, monolith catalyst, microemulsion, carbon monoxide, preferential oxidation