The surface behaviour of Pt/γ-Al_2O_3 and Pt-Ce/γ-Al_2O_3 catalysts was investigated by temperature-programmed desorption(TPD) and some other relevant methods.The results of high and low TPD experiments show that ce...The surface behaviour of Pt/γ-Al_2O_3 and Pt-Ce/γ-Al_2O_3 catalysts was investigated by temperature-programmed desorption(TPD) and some other relevant methods.The results of high and low TPD experiments show that cerium can increase the number of activated adsorption centres,and decrease the number of non-activated adsorption centres,but the total number of adsorption centres remains unchanged at high tem- peratures.The main model of Pt and Ce distribution on the γ-Al_2O_3 is proposed.展开更多
基金The Project supported by the National Natural Science Foundation of China
文摘The surface behaviour of Pt/γ-Al_2O_3 and Pt-Ce/γ-Al_2O_3 catalysts was investigated by temperature-programmed desorption(TPD) and some other relevant methods.The results of high and low TPD experiments show that cerium can increase the number of activated adsorption centres,and decrease the number of non-activated adsorption centres,but the total number of adsorption centres remains unchanged at high tem- peratures.The main model of Pt and Ce distribution on the γ-Al_2O_3 is proposed.
