Linked Life Data

20066348

Source:http://linkedlifedata.com/resource/pubmed/id/20066348

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2010-1-12
pubmed:abstractText
We have developed a new half-membrane-electrode assembly (MEA)-type cell that allows us to conduct attenuated total reflectance-Fourier transform infrared (ATR-FTIR) measurements at the Pt/Nafion interface under humidified N(2)/O(2) atmosphere. The cell consists of a gas-diffusion type anode placed on a carbon separator with a gas flow field, a Pt film cathode deposited chemically on an Si ATR prism and a Nafion NRE(R)211 electrolyte sandwiched between them. The construction allows the control of the atmosphere at the cathode by those at the anode via the electrolyte of 20-microm thickness. An infrared absorption band was observed at 1400-1403 cm(-1) under humidified oxygen atmosphere in close association with the appearance of ORR current. Its absence under N(2) atmosphere and insensitivity to the change from H(2)O to D(2)O humidification led us to ascribe the band to the O-O vibration of the adsorbed oxygen molecule O(2)(ads). The band intensity increased with increasing ORR current but decreased significantly in the limiting current region. However, the stability of the species at potentials as high as 1.1 V vs. the reversible hydrogen electrode (RHE) led us to rule out the possibility that the band could be due to adsorbed superoxide O(2)(-).
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1463-9084
pubmed:author
pubmed:issnType
Electronic
pubmed:day
21
pubmed:volume
12
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
621-9
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
In situ ATR-FTIR study of oxygen reduction at the Pt/Nafion interface.
pubmed:affiliation
Fuel Cell Nanomaterials Center, University of Yamanashi, 4 Takeda, Kofu 400-8510, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't