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Nano Research 2015, 8(1): 271-280 https://doi.org/10.1007/s12274-014-0664-z
Research Article | Issue | Published: 27 December 2014

Core@shell sub-ten-nanometer noble metal nanoparticles with a controllable thin Pt shell and their catalytic activity towards oxygen reduction

Show Author's Information Ntirikwendera Deogratias1,  Muwei Ji1,  Yong Zhang1,  Jiajia Liu1,  Jiatao Zhang1,2( ),  Hesun Zhu1
Research Center of Materials ScienceSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China
Department of Materials Physics and ChemistryBeijing Institute of TechnologyBeijing100081China
Keywords:
oxygen reduction, core@shell, metal nanocomposites, Pt shell, sub-ten-nanometer
Cite this article:
Deogratias N, Ji M, Zhang Y, et al. Core@shell sub-ten-nanometer noble metal nanoparticles with a controllable thin Pt shell and their catalytic activity towards oxygen reduction. Nano Research, 2015, 8(1): 271-280. https://doi.org/10.1007/s12274-014-0664-z
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Abstract Electronic supplementary material About this article

Reducing Pt loading, while improving electrocatalytic activity and the stability of Pt-based nanostructured materials, is currently a key challenge in green energy technology. Herein, we report the controllable synthesis of tri-metallic (Au@Ag@Pt) and bimetallic (Ag@Pt) particles consisting of a controllable thin Pt shell, via interface-mediated galvanic displacement. Through oil-ethanol-H2O interface mediation, the controllable "out to in" displacement of Ag atoms to Pt enables the formation of a thin Pt shell on monodisperse sub-ten-nanometer Au@Ag and Ag nanocrystals. The synthesized nanoparticles with a thin Pt shell exhibited potential catalytic activity towards the oxygen reduction reaction (ORR) due to the high exposure of Pt atoms.

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Acknowledgements

Publication history

Received: 11 September 2014
Revised: 28 November 2014
Accepted: 30 November 2014
Published: 27 December 2014
Issue date: January 2015

Copyright

© Tsinghua University Press and Springer‐Verlag Berlin Heidelberg 2014

Acknowledgements

This work was supported by the National Natural Science Foundation (Nos. 21322105, 91123001, and 51372025), the Research Fund for the Doctoral Program of Higher Education of China (2011101120016), Beijing Excellent Talent Training Project (2012D009011000007) and Program for New Century Excellent Talents in University (NCET-11-0793). The authors would like to thank Dr. Haoyi Li of the Chemistry Department, Tsinghua University for ORR measurements and helpful discussions.

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