Catalysis Letters, Vol.49, No.1-2, 65-68, 1997
Preparation and characterization of Ag/MnOx/perovskite catalysts for CO oxidation
The spray decomposition method with lanthanum nitrate, manganese nitrate, silver nitrate and citric acid was used to synthesize Ag-and Mn-incorporated perovskites. The resulting samples were characterized by X-ray diffraction, BET adsorption measurement, X-ray photoelectron spectroscopy, and temperature-programmed oxygen desorption (O-2-TPD) measurement. The obtained composite Ag/MnOx/perovskites catalysts exhibit higher activity by a few orders of magnitude at 338 K than that of LaMnO3. From the O-2-TPD measurement, the high activity of the Ag/MnOx/perovskites may result from the increase of weak oxygen adsorption below 373 K.