Enhanced electrocatalytic oxidation of methanol on Pd/polypyrrole-graphene in alkaline medium

被引：352
|
作者：
Zhao, Yanchun [1 ]
Zhan, Lu [1 ]
Tian, Jianniao [1 ]
Nie, Sulian [1 ]
Ning, Zhen [1 ]
机构：
[1] Guangxi Normal Univ, Key Lab Chem & Mol Engn Med Resources, Minist Educ China, Coll Chem & Chem Engn, Guilin 541004, Guangxi, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2011年 / 56卷 / 05期
关键词：
Graphene; Polypyrrole; Pd nanoparticles; Alkaline direct methanol fuel cells; ELECTRO-CATALYTIC OXIDATION; TERNARY COMPOSITE FILMS; WALLED CARBON NANOTUBES; PD NANOWIRE ARRAYS; ETHANOL ELECTROOXIDATION; NI; PERFORMANCE; NANOFIBERS; SUPPORT; BINARY;
D O I：
10.1016/j.electacta.2010.12.005
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The new electrocatalyst of Pd nanoparticles supported on polypyrrole-functionalized graphene (Pd/PPy-graphene) was reported. Microstructure, morphology and crystallinity of the synthesized materials were investigated by Fourier transform infrared spectrometry (FT-IR). scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The elements of the composite were characterized using energy dispersive X-ray spectroscopy (EDS). The results showed that the polypyrrole-wrapped graphene support successfully discrete Pd nanoparticles with the crystallite size of about 6 nm. Catalyst activity for methanol electro-oxidation in fuel cells was investigated by cyclic voltammetry (CV) and chronoamperometry. The fundamental electrochemical test results indicated that the electrocatalytic activity of Pd/PPy-graphene is much better than that of commercial catalyst for methanol oxidation. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1967 / 1972
页数：6
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