Chemical Vapor Deposition of Hollow Graphitic Spheres for Improved Electrochemical Durability
Knossalla J, Mielby J, Goehl D, Wang FR, Jalalpoor D, Hoepf A, Mayrhofer K, Ledendecker M, Schueth F (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 4
Pages Range: 5840-5847
Journal Issue: 6
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.
Authors with CRIS profile
Involved external institutions
Max-Planck-Institut für Kohlenforschung (MPI KoFo) / Max Planck Institute for Coal Research
Germany (DE)
Technical University of Denmark / Danmarks Tekniske Universitet (DTU)
Denmark (DK)
Max-Planck-Institut für Eisenforschung GmbH (MPIE) / Max Planck Institute for Iron Research
Germany (DE)
University College London (UCL)
United Kingdom (GB)
Germany (DE)
Technical University of Denmark / Danmarks Tekniske Universitet (DTU)
Denmark (DK)
Max-Planck-Institut für Eisenforschung GmbH (MPIE) / Max Planck Institute for Iron Research
Germany (DE)
University College London (UCL)
United Kingdom (GB)
How to cite
APA:
Knossalla, J., Mielby, J., Goehl, D., Wang, F.R., Jalalpoor, D., Hoepf, A.,... Schueth, F. (2021). Chemical Vapor Deposition of Hollow Graphitic Spheres for Improved Electrochemical Durability. ACS Applied Energy Materials, 4(6), 5840-5847. https://doi.org/10.1021/acsaem.1c00643
MLA:
Knossalla, J., et al. "Chemical Vapor Deposition of Hollow Graphitic Spheres for Improved Electrochemical Durability." ACS Applied Energy Materials 4.6 (2021): 5840-5847.
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