Effects of atmospheric trace species on the oxygen reduction reaction and the production of hydrogen peroxide

Shin Ichiro Imabayashi, Yoko Kondo, Ryotaro Komori, Akihiko Kawano, Takashi Ohsaka

研究成果: Conference contribution

13 被引用数 (Scopus)

抄録

The effects of the atmospheric trace species (SO2, Cl -, NH3) on the formation of H2O2 accompanying the O2 reduction reaction (ORR) have been elucidated in 0.1 M HClO4 using rotating ring-disk Pt electrode methodology. The potential at which the ORR starts shifts to the negative direction and the amount of formed H2O2 increases concomitantly as the amount of added SO2 or CI- increases, although Cl - less affects. The extent of the H2O2 formation is correlated to the coverage of SO2 or Cl- which was estimated from the decrease in the area of a hydrogen desorption peaks. This suggests that the adsorption of SO2 or Cl- on Pt reduces the number of the adjacent adsorption sites necessary for breaking of the O-O bond and then enhances the production of. No effect on the ORR activity and the H2O2 formation was observed for NH3.

本文言語English
ホスト出版物のタイトルECS Transactions - Proton Exchange Membrane Fuel Cells 8
ページ925-930
ページ数6
2 PART 1
DOI
出版ステータスPublished - 2008 12 1
イベントProton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting - Honolulu, HI, United States
継続期間: 2008 10 122008 10 17

出版物シリーズ

名前ECS Transactions
番号2 PART 1
16
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

Conference

ConferenceProton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting
CountryUnited States
CityHonolulu, HI
Period08/10/1208/10/17

ASJC Scopus subject areas

  • Engineering(all)

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