DataVXACS Applied Energy MaterialsPaper
journal article·2021-06-28Open access

Chemical Vapor Deposition of Hollow Graphitic Spheres for Improved Electrochemical Durability

J. Knossalla, J. Mielby, D. Göhl, F. R. Wang, D. Jalalpoor, A. Hopf, K. J. J. Mayrhofer, M. Ledendecker, F. Schüth

ACS Applied Energy Materials· Volume 4· Issue 6
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Source abstract

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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Research context

Catalysis & surfacesMaterials processing

OpenAlex topics: Electrocatalysts for Energy Conversion · Supercapacitor Materials and Fabrication · Advancements in Battery Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany

Centre for Catalysis and Sustainable Chemistry, Department of Chemistry, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark

Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany

Department of Technical Chemistry, Technical University Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany

Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, U.K.

Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Egerlandstr. 3, 91058 Erlangen, Germany

Funding

Bundesministerium für Wirtschaft und Energie

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