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  Chemical Vapor Deposition of Hollow Graphitic Spheres for Improved Electrochemical Durability

Knossalla, J., Mielby, J., Göhl, D., Wang, F. R., Jalalpoor, D., Hopf, A., et al. (2021). Chemical Vapor Deposition of Hollow Graphitic Spheres for Improved Electrochemical Durability. ACS Applied Energy Materials, 4(6), 5840-5847. doi:10.1021/acsaem.1c00643.

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Genre: Journal Article
Alternative Title : ACS Applied Energy Materials

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 Creators:
Knossalla, J.1, Author              
Mielby, J.2, Author
Göhl, D.3, 4, Author
Wang, F. R.5, Author
Jalalpoor, D.1, Author              
Hopf, A.1, Author              
Mayrhofer, K. J. J.3, 6, Author
Ledendecker, M.3, 4, Author
Schüth, F.1, Author              
Affiliations:
1Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
2Centre for Catalysis and Sustainable Chemistry, Department of Chemistry, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark, ou_persistent22              
3Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany, ou_persistent22              
4Department of Technical Chemistry, Technical University Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany, ou_persistent22              
5Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, U.K., ou_persistent22              
6Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Egerlandstr. 3, 91058 Erlangen, Germany, ou_persistent22              

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 Abstract: The wet-chemical synthesis of hollow graphitic spheres, a highly defined model catalyst support for electrocatalytic processes, is laborious and not scalable, which hampers potential applications. Here, we present insights into the chemical vapor deposition (CVD) of ferrocene as a simple, scalable method to synthesize hollow graphitic spheres (HGScvd). During the CVD process, iron and carbon are embedded in the pores of a mesoporous silica template. In a subsequent annealing step, iron facilitates the synthesis of highly ordered graphite structures. We found that the applied temperature treatment allows for controlling of the degree of graphitization and the textural properties of HGScvd. Further, we demonstrate that platinum loaded on HGScvd is significantly more stable during electrochemical degradation protocols than catalysts based on commercial high surface area carbons. The established CVD process allows the scalable synthesis of highly defined HGS and therefore removes one obstacle for a broader application.

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Language(s): eng - English
 Dates: 2021-03-042021-06-022021-06-28
 Publication Status: Published online
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acsaem.1c00643
 Degree: -

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Title: ACS Applied Energy Materials
  Abbreviation : ACS Appl. Energy Mater.
Source Genre: Journal
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Affiliations:
Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 4 (6) Sequence Number: - Start / End Page: 5840 - 5847 Identifier: ISSN: 02574-0962
CoNE: https://pure.mpg.de/cone/journals/resource/2574-0962