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| Naji, M. |
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| Ertürk, Emre |
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| Petrov, R. H. | Madrid |
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| Azevedo, Nuno Monteiro |
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Ledendecker, M.
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Publications (6/6 displayed)
- 2021Chemical Vapor Deposition of Hollow Graphitic Spheres for Improved Electrochemical Durabilitycitations
- 2021Chemical Vapor Deposition of Hollow Graphitic Spheres for Improved Electrochemical Durability
- 2018The Electrochemical Dissolution of Noble Metals in Alkaline Mediacitations
- 2018Impact of Palladium Loading and Interparticle Distance on the Selectivity for the Oxygen Reduction Reaction toward Hydrogen Peroxidecitations
- 2018Nickel-molybdenum alloy catalysts for the hydrogen evolution reaction: Activity and stability revisedcitations
- 2017Stability and Activity of Non-Noble-Metal-Based Catalysts Toward the Hydrogen Evolution Reactioncitations
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article
Chemical Vapor Deposition of Hollow Graphitic Spheres for Improved Electrochemical Durability
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 (HGS<sub>cvd</sub>). 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 HGS<sub>cvd</sub>. Further, we demonstrate that platinum loaded on HGS<sub>cvd</sub> 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.