Abstract
Single, double and triple oxides of silver, nickel and zinc were prepared at different calcination temperatures. The obtained phases were identified using X-ray technique. The catalytic properties of the oxides were investigated by studying the decomposition of hydrogen peroxide. The double oxide Ag2NiO2 found to have the highest catalytic activity over pure NiO, Ag2O or ZnO. The activity of the double oxide was decreased on adding zinc to the phase. The activity for all systems studied was interpreted on the basis of the theory of catalytically active sites. The catalytic activity dependent on the concentration of the active sites and not on its nature. The active sites were energetically comparable although it is different in nature.