Effect of Pretreatment on Carbon-Supported Au/TiO Catalysts for Preferential Oxidation of CO.

The impact of thermal treatment at various preparation stages of carbon supported Au/TiO catalysts prior to oxidation of CO in the presence and absence of hydrogen was studied. An increase in catalytic activity for thermally treated samples due to a more ordered structure of TiO was observed. A reversible deactivation of the catalysts occurred in the absence of hydrogen. However, the activity was restored at preferential CO oxidation conditions in presence of hydrogen. [ABSTRACT FROM AUTHOR]