Non-faradaic electrochemical modification of catalytic activity of propane oxidation on Pt-impregnated YSZ

Effects of two Pt-YSZ fabrication methods on Non-Electrochemical Modification of Catalytic Activity (NEMCA) of propane oxidation were studied. Pt-YSZ were prepared either by strong electrostatic adsorption (SEA) or by wet impregnation (WI), for both of which the Pt loadings on YSZ were equal. NEMCA of propane oxidation at the prepared supported catalyst was studied under a stoichiometric amount of oxygen at 200-480 ๐C, atmospheric pressure, and in a range of electrical potential of 6-30 V. The highest faradaic yield of 5.2×104 was achieved at 200 ๐C with a cell voltage of 6 V at Pt-YSZ prepared by SEA. However, the faradaic yields decreased as the temperature was increased. The dispersion of Pt of the supported catalysts was characterized by CO chemisorption. The results indicated that SEA offered higher Pt dispersion of 80.79%, compared to the value from WI at 44.34%.