Abstract
A strong synergism between Au and Mn substantially increased the catalytic activity of the Au-Mn/TOS catalyst for the complete propane oxidation as compared to the activity of mono metal Au/TOS and Mn/TOS catalysts. The high activity of Au-Mn/TOS catalyst is a result of the formation of Au2Mn or Au5Mn2 phases and enhanced mobility of the oxygen in the support oxides. XPS, TPR, TEM and XRD studies were used to characterise the catalysts. Based on the results, a possible mechanism for the participation of the non-stoichiometric and lattice oxygen is also proposed. It is suggested that a joint effect of the Au and Mn increased the non-stoichiometric and lattice oxygen mobility of the Au-Mn/TOS catalyst, potentially being dominated by Mn. (C) 2014 Elsevier B.V. All rights reserved.