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Local Impact of Pt Nanodeposits on Ionomer Decomposition in Polymer Electrolyte Membranes

Helmly, Stefan and Eslamibidgoli, Mohammad and Friedrich, K. Andreas and Eikerling, Michael (2017) Local Impact of Pt Nanodeposits on Ionomer Decomposition in Polymer Electrolyte Membranes. Electrocatalysis, 8 (6), pp. 501-508. Springer. DOI: 10.1007/s12678-017-0353-2 ISSN 1868-2529

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Based on recent theoretical studies, we designed a multistep experimental protocol to understand the impact of environmental conditions around Pt nanodeposits on Membrane chemical degradation. The first experiment probes the local potential at a Pt microelectrode for different rates of permeation of hydrogen and oxygen gases from anode and cathode side. The subsequent degradation experiment utilizes the local conditions taken from the first experiment to analyze local rates of ionomer degradation. The rate of ionomer decomposition is significantly enhanced in the anodic H2-rich membrane region, which can be explained with the markedly increased amount of H2O2 formation at Pt nanodeposits in this region.

Item URL in elib:https://elib.dlr.de/117099/
Document Type:Article
Title:Local Impact of Pt Nanodeposits on Ionomer Decomposition in Polymer Electrolyte Membranes
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Helmly, Stefanstefan.helmly (at) dlr.deUNSPECIFIED
Eslamibidgoli, MohammadSimon Fraser University, CanadaUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.dehttps://orcid.org/0000-0002-2968-5029
Eikerling, MichaelSimon Fraser University; CanadaUNSPECIFIED
Date:February 2017
Journal or Publication Title:Electrocatalysis
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1007/s12678-017-0353-2
Page Range:pp. 501-508
Keywords:Ionomer decomposition Pt in the Membrane Hydrogen peroxide Formation Local reaction conditions
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC Fahrzeugkonzepte (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Friedrich, Prof.Dr. Kaspar Andreas
Deposited On:21 Dec 2017 15:57
Last Modified:21 Dec 2017 15:57

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