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  High temperature stability study of carbon supported high surface area catalysts - Expanding the boundaries of ex-situ diagnostics

Polymeros, G., Baldizzone, C., Geiger, S., Grote, J., Knossalla, J., Mezzavilla, S., et al. (2016). High temperature stability study of carbon supported high surface area catalysts - Expanding the boundaries of ex-situ diagnostics. Electrochimica Acta, 211, 744-753. doi:10.1016/j.electacta.2016.06.105.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-85A5-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-85A6-8
Genre: Journal Article

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 Creators:
Polymeros, G.1, Author
Baldizzone, C.1, 2, Author
Geiger, S.1, Author              
Grote, J.P.1, Author
Knossalla, Johannes3, Author              
Mezzavilla, Stefano4, Author              
Keeley, G.P.1, Author
Cherevko, S.1, 2, Author
Zeradjanin, A.R.1, 2, Author
Schüth, Ferdi4, Author              
Mayrhofer, K.J.J.1, 2, 5, Author
Affiliations:
1Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Strasse 1, 40237 Düsseldorf, Germany, ou_persistent22              
2Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Egerlandstraße 3, 91058 Erlangen, Germany, ou_persistent22              
3Department of Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany, ou_persistent22              
4Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
5Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany, ou_persistent22              

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 Abstract: Abstract The performance of proton-exchange membrane fuel cells (PEMFCs) is defined by the equally important parameters of the intrinsic activity and stability of the electrocatalysts. This work focuses on the stability of carbon supported high surface area oxygen reduction reaction catalysts at potentials and temperatures similar to the operating conditions of PEMFCs. The catalysts used for this investigation consist of Pt nanoparticles of the same particle size supported on two types of carbon support having different textural properties, i.e., Vulcan and Hollow Graphitic Spheres (HGS). A broad toolbox of characterization techniques is utilized at 60°C in order to resolve the contribution of the different degradation mechanisms, namely nanoparticle coalescence, metal dissolution and the corrosion of carbon support, to the total active surface area loss. The results obtained by investigating the impact of temperature, potential treatment and catalyst layer morphology on the aging behavior lead to a deeper understanding of the aging mechanisms and their interrelation at application-relevant conditions. Moreover, the previously reported improved performance of the Pt/HGS catalyst is confirmed also under higher temperatures. The experimental approach introduced in this work, highlights new challenges for high-temperature degradation investigations with supported PEMFC catalyst.

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Language(s): eng - English
 Dates: 2016-07-212016-09-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.electacta.2016.06.105
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Title: Electrochimica Acta
  Abbreviation : Electrochim. Acta
Source Genre: Journal
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Publ. Info: Oxford, UK : Pergamon-Elsevier Science Ltd
Pages: - Volume / Issue: 211 Sequence Number: - Start / End Page: 744 - 753 Identifier: ISSN: 0013-4686
CoNE: https://pure.mpg.de/cone/journals/resource/954925396434