Graphene-induced Pd nanodendrites: A high performance hybrid nanoelectrocatalyst
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- 作者：Subash Chandra Sahu (1)
Aneeya K. Samantara (1)
Ajit Dash (1)
R. R. Juluri (2)
Ranjan K. Sahu (3)
B. K. Mishra (1)
Bikash Kumar Jena (1) - 关键词：nanodendrites ; reduced graphene ; methanol oxidation ; surface poisoning
- 刊名：Nano Research
- 出版年：2013
- 出版时间：September 2013
- 年：2013
- 卷：6
- 期：9
- 页码：635-643
- 全文大小：898KB
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Aneeya K. Samantara (1)
Ajit Dash (1)
R. R. Juluri (2)
Ranjan K. Sahu (3)
B. K. Mishra (1)
Bikash Kumar Jena (1)
1. Colloids & Materials Chemistry, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, 751013, India
2. Institute of Physics, Bhubaneswar, 751005, India
3. Materials Science and Technology Division, National Metallurgical Laboratory, Jamshedpur, 831007, India - ISSN：1998-0000
文摘
A facile and green approach has been developed for the in situ synthesis of hybrid nanomaterials based on dendrite-shaped Pd nanostructures supported on graphene (RG). The as-synthesized hybrid nanomaterials (RG-PdnDs) have been thoroughly characterized by high resolution transmission electron microscopy, X-ray photoelectron spectroscopy, atomic force microscopy, Raman spectroscopy and electrochemical techniques. The mechanism of formation of such dendrite-shaped Pd nanostructures on the graphene support has been elucidated using TEM measurements. The RG induces the formation of, and plays a decisive role in shaping, the dendrite morphology of Pd nanostructures on its surface. Cyclic voltammetry and chronoamperometry techniques have been employed to evaluate the electrochemical performance of RG-PdnDs towards oxidation of methanol. The electrochemical (EC) activities of RG-PdnDs are compared with graphene-supported spherical-shaped Pd nanostructures, Pd nanodendrites alone and a commercial available Pd/C counterpart. The combined effect of the graphene support and the dendrite morphology of RG-PdnDs triggers the high electrocatalytic activity and results in robust tolerance to CO poisoning.