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Facile synthesis of reduced graphene oxide/Pt-Ni nanocatalysts: their magnetic and catalytic properties

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Title Facile synthesis of reduced graphene oxide/Pt-Ni nanocatalysts: their magnetic and catalytic properties
 
Creator SAHOO, PK
PANIGRAHY, B
BAHADUR, D
 
Subject IN-SITU SYNTHESIS
METHANOL OXIDATION
ELECTROCATALYTIC ACTIVITY
ALLOY NANOPARTICLES
BIMETALLIC CLUSTERS
OXYGEN REDUCTION
NANOSHEETS
NANOCOMPOSITES
GRAPHITE
PLATINUM
 
Description The catalytic performance of metals can be enhanced by intimately alloying different metals with Reduced Graphene Oxide (RGO). In this work, we have demonstrated a simplistic in situ one-step reduction approach for the synthesis of RGO/Pt-Ni nanocatalysts with different atomic ratios of Pt and Ni, without using any capping agent. The physical properties of the as-synthesized nanocatalysts have been systematically investigated by XRD, FTIR, Raman spectroscopy, XPS, EDX, ICP-AES, and TEM. The composition dependent magnetic properties of the RGO/Pt-Ni nanocatalysts were investigated at 5 and 300 K, respectively. The results confirm that the RGO/Pt-Ni nanocatalysts show a super-paramagnetic nature at room temperature in all compositions. Furthermore, the catalytic activities of the RGO/Pt-Ni nanocatalysts were investigated by analyzing the reduction of p-nitrophenol, and the reduction rate was found to be susceptible to the composition of Pt and Ni. Moreover, it has been found that RGO/Pt-Ni nanocatalysts show superior catalytic activity compared with the bare Pt-Ni of the same composition. Interestingly, the nanocatalysts can be readily recycled by a strong magnet and reused for the next reactions.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2014-12-29T06:14:00Z
2014-12-29T06:14:00Z
2014
 
Type Article
 
Identifier RSC ADVANCES, 4(89)48563-48571
2046-2069
http://dx.doi.org/10.1039/c4ra07686a
http://dspace.library.iitb.ac.in/jspui/handle/100/17283
 
Language English