Open AccessEvaluation of Oxygen Electroreduction on Metal Oxide-supported Platinum Catalysts
Author(s) -
Yūichi Suzuki
Publication year - 2004
Publication title -
ecs proceedings volumes
Language(s) - English
Resource type - Journals
eISSN - 2576-1579
pISSN - 0161-6374
DOI - 10.1149/200421.0148pv
Subject(s) - overpotential , platinum , catalysis , oxide , electrolyte , inorganic chemistry , oxygen , proton exchange membrane fuel cell , metal , chemistry , carbon fibers , glassy carbon , materials science , electrode , electrochemistry , organic chemistry , cyclic voltammetry , composite material , composite number
Pt catalysts were dispersed as small particles on highsurface-area carbon powders to get a better utilization of Pt. However, many papers have reported that the specific activity decreased with the decrease in Pt particle size on Pt/C (~3nm). On the other hand, Pt alloys with transition metals (Co, Cr, Ni, Fe, etc.) 2,3 or Pt with metal oxide (WO3, etc.) 4,5 have shown the enhanced electrocatalytic activity for ORR with respect to pure Pt. Thus, transition metal or metal oxides might have some effect to Pt characteristics. In this work, we have investigated the effect of metal oxide supports as base materials to the catalytic activity of Pt cathode. Because of large contact resistance and electric resistance of oxide, it is difficult to evaluate the activity of Pt when the oxide layer is thick. We prepared very thin layer of metal oxides support on glassy carbon rod by RF spattering and evaluate the catalytic activity of Pt on it using a solid-state cell.
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