HYDROGEN-TREATED AND OXYGEN-TREATED PT AL2O3 CATALYST/

Some typical temperature-programmed reduction (TPR) and hydrogen tempe rature-programmed desorption (TPD) experiments on a 0.6%wt.Pt/Al2O3 ca talyst have been analysed in conjunction with parallel ''in situ'' AC electrical conductivity measurements, in order to gain more insight in to the nature of the catalyst interaction with oxidizing and reducing atmosphere. Comparative analysis of results demonstrates their similar ity and indicates that ''in situ'' AC electrical measurements is a sui table method for characterization of superficial properties of the cat alysts.