Detection of OH radicals as the effect of Pt particles in the membrane of polymer electrolyte fuel cells

• Published in: Journal of power sources Vol. 195; no. 15; pp. 4647 - 4652
• Main Authors: Ohguri, Nobuaki, Nosaka, Atsuko Y., Nosaka, Yoshio
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.08.2010; Elsevier
• Subjects: Applied sciences; Deterioration; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Energy; Energy. Thermal use of fuels; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; Fluorescence probe; Fuel cells; Nafion; OH radical; Polymer electrolyte fuel cell; Pt dispersion; Fluorescence probe; Deterioration; Nafion; OH radical; Polymer electrolyte fuel cell; Pt dispersion; Polymer electrolytes; Polymer solid electrolyte; Fluorescence; Sulfonate copolymer; Degradation; Tetrafluoroethylene copolymer; Proton exchange membrane fuel cells; Solid electrolyte fuel cells
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2010.02.010

The formation of OH radicals ( OH) for polymer electrolyte fuel cell (PEFC) was investigated with a homemade test cell by means of a fluorescence probe method for several kinds of membrane electrode assembly (MEA) consisting of Nafion. After 12-h operation under open circuit condition, OH was detected at both the anode and the cathode sides but the amount was much larger for the anode side. The formation of OH considerably depended on the amount of Pt/C catalyst loaded in the MEA. Dispersion of Pt particles in Nafion membranes increased the OH formation, but Pt ions did not. Based on the results, the formation mechanism was discussed.