CATALYTIC-OXIDATION OF CO AT AMBIENT-TEMPERATURE AND HUMIDITY ON AU NIO PREPARED BY USING DIFFERENT METHODS/

The activities and durability of the oxidation of CO at ambient temper ature and humidity on nanometer Au/NiO prepared by using different met hods were studied, It was found that the activities and durability of the catalysts were greatly changed with the preparation methods and ca lcining temperature, Active and durable catalyst can be obtained by ca reful control of the preparation procedures. Among the samples tested, Au/NiO prepared by the following conditions-Na2CO3 solution was added into an aqueous solution of Ni(NO3)(2), HAuCl4 and dodecylbenzene sul fonic acid sodium salt (DBS), the resultant precipitate was heated to 70 degrees C and washed with deionized hot water of 70 degrees C, foll owed by drying at room temperature for 48 h, and then the precipitate was calcined at 300 degrees C-showed the highest activity and durabili ty, it was even able to oxidize CO completely at 20 degrees C in the p resence of 1.8% water vapor for 27 h.