Abstract:

Much effort is made to reduce CO to environment pollution^[1]. The precious metal (such as Pt, Pd, Rh) are well known to apply in the total oxidation to treat with the exhaust gas emission and CO, which have good situation in high activity and stability^[2]. Due to the high cost and limited availability of precious metal, people become more and more interested in searching base metals to replace precious metal, especially,transition metal oxide catalysts. In our study, the results indicate that the Ag/Fe (1:1) catalyst exhibits highest active to CO oxidation. It is detected that the highly dispersed state of σ-AgFeO₂ is the active site for CO oxidation.