Detection of Reactive Oxygen Species in Anion Exchange Membrane Fuel Cells using In Situ Fluorescence Spectroscopy
Abstract
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 in situ 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 in situ generation of O2.− during AEM fuel cell operation was estimated to be 18.3 kJ mol−1. The rate of in situ generation of O2.− correlated well with the experimentally measured loss in AEM ion‐exchange capacity and ionic conductivity attributable to oxidative degradation.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 28, 2017
- Source ID
- 10.1002/cssc.201700760
Entities
People
- Javier Parrondo
- Shrihari Sankarasubramanian
- Vijay Ramani
- Yunzhu Zhang
Organizations
- Office of Naval Research
- Washington University in St. Louis