The graphite electrode surface adsorbed by 5,10,15,20-tetrakis(pentafluorophenyl)-21H, 23H-porphine iron (III), abbreviated as (FeTPFPP)-T-III, displays strong electrocatalytic activity toward O-2 reduction. The surface adsorption of (FeTPFPP)-T-III was investigated at different pH levels and temperatures by cyclic voltammetry. The kinetics of catalyzed O-2 reduction at different temperatures, as measured by cyclic voltammetry and a rotating disk electrode, was analyzed and the corresponding reaction mechanism was proposed. A four-electron/four-proton process was found to be the dominating pathway for catalyzed O-2 reduction. Furthermore, an increase in temperature from 20 to 70 degrees C was shown to significantly enhance the reduction rate. The implication of such non-noble electrocatalysts for the cathode reaction in low-temperature proton exchange membrane fuel cells is discussed. (c) 2005 The Electrochemical Society.