CHARACTERIZATION AND TEMPERATURE-PROGRAMMED STUDIES OVER PD TIO2 CATALYSTS FOR NO REDUCTION WITH METHANE/

Characterization and temperature-programmed studies were performed ove r Pd/titania catalysts to examine their activity in the reduction of N O with methane. The catalyst was prepared using a wet impregnation tec hnique and Pd-acetate was used as a precursor for palladium. Technique s such as BET surface area measurements, X-ray diffraction, laser Rama n spectroscopy, X-ray photoelectron spectroscopy, and scanning electro n microscopy were used for the characterization of the catalyst before and after the reaction. Temperature-programmed reduction (TPR) and te mperature-programmed desorption (TPD) were also used to probe the surf ace to understand its adsorption/desorption characteristics and reduci ng capabilities. The results obtained from these studies together with the reaction investigations have given some important insight into th e functionality of this catalyst. (C) 1998 Elsevier Science B.V.