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Carbon-Based Yolk–Shell Materials for Fuel Cell Applications

MPS-Authors
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Galeano Nunez,  Diana Carolina
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Baldizzone,  Claudio
Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Bongard,  Hans-Josef
Service Department Lehmann (EMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Spliethoff,  Bernd
Service Department Lehmann (EMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Weidenthaler,  Claudia
Research Group Weidenthaler, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Meier,  J. C.
Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Mayrhofer,  Karl Johann Jakob
Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Schüth,  Ferdi
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Galeano Nunez, D. C., Baldizzone, C., Bongard, H.-J., Spliethoff, B., Weidenthaler, C., Meier, J. C., et al. (2014). Carbon-Based Yolk–Shell Materials for Fuel Cell Applications. Advanced Functional Materials, 24(2), 220-232. doi:10.1002/adfm.201302239.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0015-8459-1
Abstract
The synthesis of yolk–shell catalysts, consisting of platinum or gold–platinum cores and graphitic carbon shells, and their electrocatalytic stabilities are described. Different encapsulation pathways for the metal nanoparticles are explored and optimized. Electrochemical studies of the optimized AuPt, @C catalyst revealed a high stability of the encapsulated metal particles. However, in order to reach full activity, several thousand potential cycles are required. After the electrochemical surface area is fully developed, the catalysts show exceptionally high stability, with almost no degradation over approximately 30 000 potential cycles between 0.4 and 1.4 VRHE.