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Journal of Materials Chemistry A Vol - 1 Issue - 9

Journal of Materials Chemistry A Vol - 1 Issue - 8

Journal of Materials Chemistry A Vol - 1 Issue - 7

Journal of Materials Chemistry A Vol - 1 Issue - 6

Journal of Materials Chemistry A Vol - 1 Issue - 5

Synthesis of copper nanowire decorated reduced graphene oxide for electro-oxidation of methanol

Content Provider	Royal Society of Chemistry (RSC)
Author	Liu, Jifeng Lin, Hsiu-Mei Periasamy, Arun Prakash Chang, Huan-Tsung
Copyright Year	2013
Abstract	Hierarchical copper nanowires (Cu NWs) having structures of rose-like stems with nano-thorns, with an average length and width of 6 ± 4 μm and 100 ± 15 nm, respectively, are prepared through a simple hydrothermal approach. In the presence of catechin, nano-thorn growth readily occurs from the side faces (200) of rose-like stems that are partially covered with ethylenediamine (EDA) that acts as a complexing agent for Cu2+. The size and morphology of Cu NWs are highly dependent on the concentrations of catechin, EDA, and reaction time. The hydrothermal approach is further applied to the preparation of a Cu NW decorated reduced graphene oxide (Cu NW@RGO) composite in the presence of graphene oxide (GO) and catechin as a reducing agent. The Cu NWs in Cu NW@RGO have a similar structure to that of Cu NWs prepared in bulk solution, with an average length and width of 4 ± 2 μm and 200 ± 4 nm, respectively. The Cu NW@RGO relative to Cu NWs has greater dispersion in aqueous solution, mainly because of greater hydrophilicity of RGO than Cu NW. The Cu NW@RGO-GCE relative to the bare glassy carbon electrode (GCE) (236 Ω) and Cu NW-GCE (322 Ω) has a small charge transfer resistance value (87 Ω), because of the facile electron transfer ability and good conductivity provided by RGO. The Cu NW@RGO composite featuring low-cost, high durability, low onset potential (ca. 0.48 V) and high mass activity (1.11 mA μg−1) exhibits a superior catalytic activity for methanol oxidation in an alkaline medium.
Starting Page	5973
Ending Page	5981
Page Count	9
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	1
Issue Number	19
Journal	Journal of Materials Chemistry A
DOI	10.1039/c3ta10745k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Cu NWs Cu NW Copper Micrometre Hydrothermal circulation Catechin Ethylenediamine Electronic design automation Graphene Redox Dispersion relation Hydrophile Carbon Electrode Methanol
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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