Knossalla, J;
Mielby, J;
Goehl, D;
Wang, FR;
Jalalpoor, D;
Hoepf, A;
Mayrhofer, KJJ;
... Schueth, F; + view all
(2021)
Chemical Vapor Deposition of Hollow Graphitic Spheres for Improved Electrochemical Durability.
ACS Applied Energy Materials
, 4
(6)
pp. 5840-5847.
10.1021/acsaem.1c00643.
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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.
| Type: | Article |
|---|---|
| Title: | Chemical Vapor Deposition of Hollow Graphitic Spheres for Improved Electrochemical Durability |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acsaem.1c00643 |
| Publisher version: | https://doi.org/10.1021/acsaem.1c00643 |
| Language: | English |
| Additional information: | This is the version of record, available under the Creative Commons Attribution 4.0 International (CC BY 4.0) licence |
| Keywords: | mesoporous carbon; liquid-free synthesis; chemical vapor deposition; stability enhancement; PEMFC |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10131870 |
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| 2. |  Russian Federation | 2 |
| 3. |  China | 2 |
| 4. |  Germany | 1 |
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