Non-faradaic Electrochemical Modification of Catalytic Activity (NEMCA) of propane oxidation at Pt dispersed on yttria-stabilized zirconia (YSZ) discs by strong electrostatic adsorption (SEA) and wet impregnation (WI) in wireless configuration was studied and compared. With a stoichiometric gas mixture of propane and oxygen diluted in helium, an exceptionally large faradaic yield of 5.2 × 10 4 was achieved from a cell prepared by SEA at a reaction temperature of 200 • C and a cell voltage of 6 V, compared to a smaller value of 1.0 × 10 4 obtained from a cell prepared by WI. A conceptual mechanism explaining the dependence of the faradaic yields and the rate enhancement ratios on Pt particle sizes is proposed.