A study on effect of Rh precursor and La addition on N2O decomposition over Rh catalyst

The decomposition of N2O in the presence of oxygen was studied on Rh/CeO2 and Rh/La2O3-CeO2 catalysts prepared by wet impregnation method. The conversion of N2O decomposition increased as the Rh loading increased, and the Rh-chloride catalyst showed a poor activity than the Rh-nitrate catalyst. XPS and IC/ICP analysis confirmed that the Rh-chloride catalyst's low activity caused since Rh-chloride catalyst had the some RhCl3 species. N2O decomposition rate over Rh/La2O3-CeO2 catalysts decreased as the La loading increased due to the SMSI effect between Rh and CeO2. H-2 TPR confirmed that the activity and reducibility of the catalyst were closely related. (c) 2012 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.