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

✍ Scribed by Nobuaki Ohguri; Atsuko Y. Nosaka; Yoshio Nosaka

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 623 KB
• Volume: 195
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2010.02.010

✦ Synopsis

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.