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Issue 18, 2018
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Robust graphene-wrapped PtNi nanosponge for enhanced oxygen reduction reaction performance

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Abstract

We synthesize a graphene-wrapped 3D-PtNi nanosponge (G-PtNi NS) using formic acid as a reducing agent and carbon dots as a structure-directing agent at room temperature. Reduced Ni and Pt atoms initiate the exfoliation of carbon dots into graphene dots, which eventually encapsulate the PtNi nanocrystals. The strong Pt–carbon interaction propels the formation of the G-PtNi NS with large specific surface area and good long-term stability. The G-PtNi NS shows high reactivity for an oxygen reduction reaction (ORR). The ORR activity is maintained even after 3000 cycles. We confirm that the graphene layers physically stabilize the PtNi NS and chemically adjust the oxygen affinity of the PtNi NS, which both positively contribute to the ORR performance.

Graphical abstract: Robust graphene-wrapped PtNi nanosponge for enhanced oxygen reduction reaction performance

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Supplementary files

Article information


Submitted
26 Feb 2018
Accepted
18 Apr 2018
First published
19 Apr 2018

J. Mater. Chem. A, 2018,6, 8259-8264
Article type
Communication

Robust graphene-wrapped PtNi nanosponge for enhanced oxygen reduction reaction performance

Q. C. Tran, H. An, H. Ha, V. T. Nguyen, N. D. Quang, H. Y. Kim and H. Choi, J. Mater. Chem. A, 2018, 6, 8259
DOI: 10.1039/C8TA01847B

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