TY - GEN
T1 - Effects of atmospheric trace species on the oxygen reduction reaction and the production of hydrogen peroxide
AU - Imabayashi, Shin Ichiro
AU - Kondo, Yoko
AU - Komori, Ryotaro
AU - Kawano, Akihiko
AU - Ohsaka, Takashi
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=63449119550&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=63449119550&partnerID=8YFLogxK
U2 - 10.1149/1.2981931
DO - 10.1149/1.2981931
M3 - Conference contribution
AN - SCOPUS:63449119550
SN - 9781566776486
T3 - ECS Transactions
SP - 925
EP - 930
BT - ECS Transactions - Proton Exchange Membrane Fuel Cells 8
PB - Electrochemical Society Inc.
T2 - Proton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting
Y2 - 12 October 2008 through 17 October 2008
ER -