Three-dimensional PtNi hollow nanochains as an enhanced electrocatalyst for the oxygen reduction reaction

Shaofang Fu; Chengzhou Zhu; Junhua Song; Mark H. Engelhard; Yang He; Dan Du; Chongmin Wang; Yuehe Lin

doi:10.1039/C6TA01801G

Three-dimensional PtNi hollow nanochains as an enhanced electrocatalyst for the oxygen reduction reaction†

Shaofang Fu,‡^a Chengzhou Zhu,‡*^a Junhua Song,^a Mark H. Engelhard,^b Yang He,^c Dan Du,^a Chongmin Wang^b and Yuehe Lin*^ab

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* Corresponding authors

^a The School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, USA
E-mail: yuehe.lin@wsu.edu

^b Pacific Northwest National Laboratory, Richland, WA 99352, USA
E-mail: yuehe.lin@pnnl.gov

^c Department of Mechanical Engineering and Materials Science, University of Pittsburgh, PA 15261, USA

Abstract

Three-dimensional porous PtNi hollow nanochains were successfully synthesized via a galvanic replacement method using Ni nanosponges as sacrificial templates in an aqueous solution. It is found that the composition and shell thickness of 3D PtNi hollow nanochains can be easily controlled by tuning the concentration of Pt precursors. The as-prepared PtNi hollow nanochains with an optimized composition present a high electrochemical surface area (70.8 m² g⁻¹), which is close to that of commercial Pt/C (83 m² g⁻¹). Moreover, the PtNi catalyst with a Pt content of ∼77% presents superior electrocatalytic performance for the oxygen reduction reaction compared to commercial Pt/C. It shows a mass activity of 0.58 A mg_Pt⁻¹, which is around 3 times higher than that of Pt/C. This strategy may be extended to the preparation of other multimetallic nanocrystals with 3D hollow nanostructures, which are expected to present high catalytic properties.

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DOI: https://doi.org/10.1039/C6TA01801G
Article type: Paper
Submitted: 01 Mar 2016
Accepted: 05 May 2016
First published: 05 May 2016

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J. Mater. Chem. A, 2016,4, 8755-8761

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Three-dimensional PtNi hollow nanochains as an enhanced electrocatalyst for the oxygen reduction reaction

S. Fu, C. Zhu, J. Song, M. H. Engelhard, Y. He, D. Du, C. Wang and Y. Lin, J. Mater. Chem. A, 2016, 4, 8755 DOI: 10.1039/C6TA01801G

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Journal of Materials Chemistry A

Three-dimensional PtNi hollow nanochains as an enhanced electrocatalyst for the oxygen reduction reaction†

Abstract

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Three-dimensional PtNi hollow nanochains as an enhanced electrocatalyst for the oxygen reduction reaction

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