Premium
Detection of Reactive Oxygen Species in Anion Exchange Membrane Fuel Cells using In Situ Fluorescence Spectroscopy
Author(s) -
Zhang Yunzhu,
Parrondo Javier,
Sankarasubramanian Shrihari,
Ramani Vijay
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201700760
Subject(s) - chemistry , in situ , membrane , ion , fluorescence , oxygen , fluorescence spectroscopy , ion exchange , photochemistry , spectroscopy , reactive oxygen species , superoxide , ionic bonding , analytical chemistry (journal) , inorganic chemistry , organic chemistry , biochemistry , physics , quantum mechanics , enzyme
The objectives of this study were: 1) to confirm superoxide anion radical (O 2 .− ) formation, and 2) to monitor in real time the rate of O 2 .− generation in an operating anion exchange membrane (AEM) fuel cell using in situ fluorescence spectroscopy. 1,3‐Diphenlisobenzofuran (DPBF) was used as the fluorescent molecular probe owing to its selectivity and sensitivity toward O 2 .− in alkaline media. The activation energy for the in situ generation of O 2 .− during AEM fuel cell operation was estimated to be 18.3 kJ mol −1 . The rate of in situ generation of O 2 .− correlated well with the experimentally measured loss in AEM ion‐exchange capacity and ionic conductivity attributable to oxidative degradation.