Core/shell Ni@Pd nanoparticles supported on MWCNTs at improved electrocatalytic performance for alcohol oxidation in alkaline media

被引：98
作者：
Zhang, Mingmei [1 ]
Yan, Zaoxue [1 ]
Xie, Jimin [1 ]
机构：
[1] Jiangsu Univ, Sch Chem & Chem Engn, Zhenjiang 212013, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2012年 / 77卷
关键词：
Carbon nanotube; Core/shell Ni@Pd electrocatalyst; Alcohol oxidation; Alkaline media; Fuel cell; CORE-SHELL NANOPARTICLES; WALLED CARBON NANOTUBES; OXYGEN-REDUCTION; ETHANOL OXIDATION; ELECTROLESS DEPOSITION; SINGLE-CRYSTAL; CATALYTIC-ACTIVITY; AU NANOPARTICLES; PLATINUM; ELECTROOXIDATION;
D O I：
10.1016/j.electacta.2012.05.098
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Ni@Pd nanoparticles with core/shell structure uniformly dispersed on multi-walled carbon nanotubes (Ni@Pd/MWCNTs) is successfully prepared via a two-step strategy: impregnation-reduction method and replacement method. The Ni@Pd/MWCNTs composite was characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) analysis. It shows a uniform dispersion of Ni@Pd nanoparticles with core/shell structure on MWCNTs with the average particle size of 3.4 nm. The Ni@Pd/MWCNTs composite was used as electrocatalyst for alcohol oxidation in alkaline media for fuel cells. The electrocatalytic activity of ethanol oxidation on Ni@Pd/MWCNTs is 2.3 times higher than that of Pd/MWCNTs electrocatalyst at the same Pd loadings. The enhanced electrocatalytic properties could be attributed to not only the electric synergistic effect between Pd and Ni, but also the high use ratio of Pd for its shell structure. (C) 2012 Elsevier Ltd. All rights reserved.
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页码：237 / 243
页数：7
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