Detection of Reactive Oxygen Species in Anion Exchange Membrane Fuel Cells using InSitu Fluorescence Spectroscopy

The objectives of this study were: 1)to confirm superoxide anion radical (O2.-) formation, and 2)to monitor in real time the rate of O2.- generation in an operating anion exchange membrane (AEM) fuel cell using insitu fluorescence spectroscopy. 1,3-Diphenlisobenzofuran (DPBF) was used as the fluores...

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Bibliographic Details
Published inChemSusChem Vol. 10; no. 15; p. 3056
Main Authors Zhang, Yunzhu, Parrondo, Javier, Sankarasubramanian, Shrihari, Ramani, Vijay
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 01.08.2017
Subjects
Activation energy
Anion exchanging
Correlation analysis
Fluorescence
Fuel cells
Fuels
Ion currents
Ion exchange
Ions
Selectivity
Spectroscopic analysis
Spectrum analysis
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Summary:The objectives of this study were: 1)to confirm superoxide anion radical (O2.-) formation, and 2)to monitor in real time the rate of O2.- generation in an operating anion exchange membrane (AEM) fuel cell using insitu fluorescence spectroscopy. 1,3-Diphenlisobenzofuran (DPBF) was used as the fluorescent molecular probe owing to its selectivity and sensitivity toward O2.- in alkaline media. The activation energy for the insitu generation of O2.- during AEM fuel cell operation was estimated to be 18.3kJmol-1. The rate of insitu generation of O2.- correlated well with the experimentally measured loss in AEM ion-exchange capacity and ionic conductivity attributable to oxidative degradation.
ISSN:1864-5631
1864-564X
DOI:10.1002/cssc.201700760