Local Impact of Pt Nanodeposits on Ionomer Decomposition in Polymer Electrolyte Membranes
| Autor: | Stefan Helmly, Michael Eikerling, Mohammad Javad Eslamibidgoli, Kaspar Andreas Friedrich |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Elektrochemische Energietechnik 020209 energy Inorganic chemistry 02 engineering and technology Electrolyte Permeation 021001 nanoscience & nanotechnology Electrochemistry Ionomer decomposition Pt in the Membrane Hydrogen peroxide Formation Local reaction conditions Anode chemistry.chemical_compound Membrane chemistry Membrane region 0202 electrical engineering electronic engineering information engineering 0210 nano-technology Ionomer Chemical decomposition |
| Zdroj: | Electrocatalysis. 8:501-508 |
| ISSN: | 1868-5994 1868-2529 |
| DOI: | 10.1007/s12678-017-0353-2 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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