Pretreatment Effect on CO Oxidation over Highly Ordered Mesoporous Silver Catalyst

Highly ordered mesoporous silver material was successfully synthesized from a mesoporous silica template (KIT-6) with 3-D channel structure using the nano-replication method. The effects of H 2 or O 2 pretreatments on the catalytic performance of the mesoporous silver were investigated using a temperature programmed CO oxidation technique in a fixed bed reactor. The mesoporous silver material that was pretreated with H 2 exhibited an excellent catalytic activity compared to the as-prepared and 0 2 -pretreated catalysts. Moreover, this present mesoporous silver material showed good catalytic stability. For the CO oxidation, the apparent activation energy of the H 2 -pretreated mesoporous silver catalyst was 61 ± 0.5 kJ mol -1 , which was also much lower than the as-prepared (132 ± 1.5 kJ mol -1 ) and O 2 -pretreated (124 ± 1.4 kJ mol -1 ) catalysts.