Nickel core–palladium shell nanoparticles grown on nitrogen-doped graphene with enhanced electrocatalytic performance for ethanol oxidation

Herein, we report a facile two-step strategy for green synthesis of nickel core–palladium shell nanoclusters on nitrogen-doped graphene (Ni@Pd/NG) without any surfactant and additional reducing agent. During the synthesis, nitrogen-doped graphene acted as both the active substance and support by tak...

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Bibliographic Details
Published inRSC advances Vol. 6; no. 40; pp. 33231 - 33239
Main Authors Zhang, Mingmei, Li, Yuan, Pan, Denghui, Yan, Zaoxue, Meng, Suci, Xie, Jimin
Format Journal Article
LanguageEnglish
Published 01.01.2016
Subjects
Electrocatalysts
Graphene
Nickel
Oxides
Palladium
Performance enhancement
Strategy
Synthesis
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Summary:Herein, we report a facile two-step strategy for green synthesis of nickel core–palladium shell nanoclusters on nitrogen-doped graphene (Ni@Pd/NG) without any surfactant and additional reducing agent. During the synthesis, nitrogen-doped graphene acted as both the active substance and support by taking advantage of its moderate reducing and highly dispersing capacities. Characterization indicated that a uniform dispersion of Ni@Pd nanoparticles on nitrogen-doped reduced graphene oxide had a 2.8 nm average particle size. Unexpectedly, the as-prepared Ni@Pd/NG hybrid exhibited much greater activity and stability than that of Pd/graphene and commercial Pd/C electrocatalyst at the same Pd loadings. Possible mechanisms for the enhanced electrocatalytic performance of nitrogen-doped reduced graphene oxide after combining with Ni@Pd are proposed. The present study provides an efficient strategy to synthesize highly efficient electrocatalysts.
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ISSN:2046-2069
2046-2069
DOI:10.1039/C6RA06416G