Vertically oriented reduced graphene oxide supported dealloyed palladium-copper nanoparticles for methanol electrooxidation

被引：64

作者：

Yang, Liming ^{[1
]}

Yan, Dafeng ^{[1
]}

Liu, Chengbin ^{[1
]}

Song, Hejie ^{[1
]}

Tang, Yanhong ^{[2
]}

Luo, Shenglian ^{[1
]}

Liu, Meijun ^{[1
]}

机构：

[1] Hunan Univ, State Key Lab Chemobiosensing & Chemometr, Changsha 410082, Hunan, Peoples R China

[2] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2015年 / 278卷

基金：

中国国家自然科学基金;

关键词：

Vertical graphene; Nanoparticles; Dealloying; Electrocatalysts; Fuel cells; FUEL-CELLS; ETHANOL OXIDATION; CATALYSTS; PERFORMANCE; SURFACE; FILMS; PD; ELECTRODEPOSITION; ELECTROCATALYSTS; FABRICATION;

D O I：

10.1016/j.jpowsour.2014.12.141

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Vertically oriented graphene-based nanocatalysts represent an emerging class of electrocatalysts due to their large surface area and excellent electrical transport ability. Herein, we report a vertically oriented reduced graphene oxide supported dealloyed palladium copper nanoparticle catalyst (PdCu/VrGO) synthesized by a facile cyclic voltammetric electrodeposition of graphene oxide in the presence of Na2PdCl4 and copper ethylenediamine tetraacetate. The structure and composition are characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy. Meanwhile, the electrochemical properties are measured by cyclic voltammetry and chronoamperometry. The PdCu/VrGO catalyst exhibits excellent electrocatalytic activity towards methanol oxidation, with the mass activity of 762.8 A g(-1), which is 7.1 times that of a commercial Pd/C catalyst. In addition, PdCu/VrGO shows good chemical stability and superior tolerance to CO poisoning. These results demonstrate that vertical reduced graphene oxide provides a promising platform for the development of electrochemical nanocatalysts. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：725 / 732

页数：8

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