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

Yunzhu Zhang; Javier Parrondo; Shrihari Sankarasubramanian; Vijay Ramani

doi:10.1002/cssc.201700760

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

Yunzhu Zhang
, Javier Parrondo
, Shrihari Sankarasubramanian
, Vijay Ramani

Research output: Contribution to journal › Article › peer-review

59 Scopus citations

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.

Original language	English
Pages (from-to)	3056-3062
Number of pages	7
Journal	ChemSusChem
Volume	10
Issue number	15
DOIs	https://doi.org/10.1002/cssc.201700760
State	Published - Aug 10 2017

Keywords

anion exchange membrane
fluorescence spectroscopy
fuel cells
ionic conductivity
superoxide anion radical

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10.1002/cssc.201700760

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title = "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.",

keywords = "anion exchange membrane, fluorescence spectroscopy, fuel cells, ionic conductivity, superoxide anion radical",

author = "Yunzhu Zhang and Javier Parrondo and Shrihari Sankarasubramanian and Vijay Ramani",

note = "Publisher Copyright: {\textcopyright} 2017 Wiley-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2017",

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TY - JOUR

T1 - Detection of Reactive Oxygen Species in Anion Exchange Membrane Fuel Cells using In Situ Fluorescence Spectroscopy

AU - Zhang, Yunzhu

AU - Parrondo, Javier

AU - Sankarasubramanian, Shrihari

AU - Ramani, Vijay

PY - 2017/8/10

Y1 - 2017/8/10

N2 - 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.

AB - 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.

KW - anion exchange membrane

KW - fluorescence spectroscopy

KW - fuel cells

KW - ionic conductivity

KW - superoxide anion radical

UR - https://www.scopus.com/pages/publications/85021414878

U2 - 10.1002/cssc.201700760

DO - 10.1002/cssc.201700760

M3 - Article

C2 - 28657214

AN - SCOPUS:85021414878

SN - 1864-5631

VL - 10

SP - 3056

EP - 3062

JO - ChemSusChem

JF - ChemSusChem

IS - 15

ER -

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

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