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  Design criteria for stable Pt/C fuel cell catalysts

Meier, J. C., Galeano Nunez, D. C., Katsounaros, I., Witte, J., Bongard, H.-J., Topalov, A. A., et al. (2014). Design criteria for stable Pt/C fuel cell catalysts. Beilstein Journal of Nanotechnology, 5, 44-67. doi:10.3762/bjnano.5.5.

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 Creators:
Meier, Josef C. 1, Author
Galeano Nunez, Diana Carolina2, Author              
Katsounaros, Ioannis1, Author
Witte, Jonathon1, Author
Bongard, Hans-Josef3, Author              
Topalov, Angel A.1, Author
Baldizzone, Claudio1, Author
Mezzavilla, Stefano2, Author              
Schüth, Ferdi2, Author              
Mayrhofer, Karl J. J. 1, Author
Affiliations:
1Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, Max-Planck-Straße 1, 40237 Düsseldorf, DE, ou_1863336              
2Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, DE, ou_1445589              
3Service Department Lehmann (EMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445625              

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Free keywords: catalyst design criteria; degradation mechanisms, fuel cell catalyst, Nanoparticles, stability
 Abstract: Platinum and Pt alloy nanoparticles supported on carbon are the state of the art electrocatalysts in proton exchange membrane fuel cells. To develop a better understanding on how material design can influence the degradation processes on the nanoscale, three specific Pt/C catalysts with different structural characteristics were investigated in depth: a conventional Pt/Vulcan catalyst with a particle size of 3-4 nm and two Pt@HGS catalysts with different paricle size, 1-2 nm and 3-4 nm. Specifically, Pt@HGS corresponds to platinum nanoparticles incorporated and confined within the pore structure of the nanostructured carbon support, i.e., hollow graphitic spheres (HGS). All three materials are characterized by the same platinum loading, so that the differences in their performance can be correlated to the structural characteristics of each material. The comparison of the activity and stability behaviour of the three catalysts, as obtained from thin film rotating disk electrode measurements and identical location electron microscopy, is also extended to commercial materials and used as a basis for a discussion of general fuel cell catalyst design principles. Namely, the effects of particle size, inter-particle distance, certain support characteristics and thermal treatment on the catalyst performance and in particular the catalyst stability are evaluated. Based on our results, a set of design criteria for more stable and active Pt/C and Pt-alloy/C material is suggested.

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 Dates: 2013-07-232013-12-192014-01-16
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.3762/bjnano.5.5
 Degree: -

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Title: Beilstein Journal of Nanotechnology
Source Genre: Journal
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Publ. Info: Frankfurt am Main : Beilstein-Institut
Pages: - Volume / Issue: 5 Sequence Number: - Start / End Page: 44 - 67 Identifier: ISSN: 2190-4286
CoNE: https://pure.mpg.de/cone/journals/resource/2190-4286