Nashrieh Shimi va Mohandesi Shimi Iran

Nashrieh Shimi va Mohandesi Shimi Iran

Stability Improvement of Oxygen Reduction Reaction Electrocatalyst using Titanium Carbide and Antimony-Doped tin Oxide to ,se in Polymer Electrolyte Membrane Fuel Cells' Cathode

Document Type : Research Article

Authors
Department of Chemistry, Tarbiat Modares University, Tehran, I.R. IRAN
Abstract
Considering the importance of the fuel cells’ catalyst durability and the appropriate stability of metal base supports in the operating conditions of polymer electrolyte membrane fuel cells, platinum nanoparticles were synthesized on commercial supports of titanium carbide and antimony-doped tin dioxide in the present paper and the structure of the synthesized electrocatalysts was investigated by X-ray diffraction spectroscopy and scanning electron microscopy. The characterization results indicate the proper catalyst synthesis. In addition, the electrochemical evaluations show the competitive activity of Pt/TiC compared to commercial Pt/C, so that the oxygen reduction reaction onset potential for Pt/C and Pt/TiC is equal to 973 and 968 mV, respectively. Long-term investigation during 10,000 degradation cycles shows the high stability of Pt/TiC electrocatalyst. For example, the charge transfer resistance increases during 10,000 cycles for Pt/C and Pt/TiC, which equals 50 and 7%, respectively. The obtained results indicate the high activity and stability of the Pt/TiC as the cathode catalyst of polymer electrolyte membrane fuel cell.
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