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Preparation of Ni@Pt core@shell conformal nanofibre oxygen reduction electrocatalysts via microwave-assisted galvanic displacement

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Abstract

Galvanic displacement is widely used for material preparation in high-tech and electronics industries, and in the last years has also found application for preparation of advanced electrocatalysts. Herein, the use of microwave irradiation is developed as an alternative means of energy delivery to increase galvanic exchange kinetics and significantly reduce the reaction time. By this means, Ni@Pt core@shell nanofibres with controlled platinum shell thickness and the Pt/Ni ratio are synthesised by an extremely fast and reproducible route. The reaction time is reduced 200-fold compared to the conventional thermal galvanic reaction. Furthermore, using microwave-assisted exchange, Pt forms a shell cleanly separated from the Ni core allowing their direct use as an electrocatalyst.

Graphical abstract: Preparation of Ni@Pt core@shell conformal nanofibre oxygen reduction electrocatalysts via microwave-assisted galvanic displacement

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Publication details

The article was received on 29 Jul 2019, accepted on 28 Oct 2019 and first published on 06 Nov 2019


Article type: Paper
DOI: 10.1039/C9CY01514K
Catal. Sci. Technol., 2019, Advance Article

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    Preparation of Ni@Pt core@shell conformal nanofibre oxygen reduction electrocatalysts via microwave-assisted galvanic displacement

    G. Ercolano, F. Farina, L. Stievano, D. J. Jones, J. Rozière and S. Cavaliere, Catal. Sci. Technol., 2019, Advance Article , DOI: 10.1039/C9CY01514K

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