Fast synthesis and electrocatalytic activity of M@Pt (M = Ru, Fe3O4, Pd) core-shell nanostructures for the oxidation of ethanol and methanol

被引：49

作者：

Sanchez-Padilla, N. M. ^{[1
]}

Montemayor, S. M. ^{[1
]}

Torres, L. A. ^{[2
]}

Rodriguez Varela, F. J. ^{[2
]}

机构：

[1] Univ Autonoma Coahuila, Fac Ciencias Quim, Depto Mat Ceram, Saltillo 25280, Coahuila, Mexico

[2] CINVESTAV Unidad Saltillo, Ramos Arizpe 25280, Coahuila, Mexico

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 28期

关键词：

Core-shell nanostructures; Magnetite-containing catalysts; Ethanol oxidation reaction; Methanol oxidation reaction; DAFCs; NANOPARTICLES; CATALYSTS; ELECTROOXIDATION; REDUCTION; CATHODES;

D O I：

10.1016/j.ijhydene.2012.11.026

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：

We report the fast synthesis and electrochemical evaluation of M@Pt core-shell nanostructures (M = Ru, Fe3O4, Pd) as well as Pt-alone nanoparticles for the ethanol and methanol oxidation reactions (EOR and MOR, respectively) in H2SO4 solution. The cores were obtained in 60 s. The Pt shells were deposited afterward on the cores also in 60 s. The reducing agent was NaBH4. XRD results showed that crystalline Pd, Fe3O4 and Pt materials were obtained from this rapid process, while Ru was formed as a quasi-amorphous structure. The average particle sizes of the core-shell nanostructures determined with the Scherrer equation, ranged from 7.35 to 9.29 nm. The electrochemical characterization revealed a catalytic activity of the novel Fe3O4@Pt anode as high as that of Ru@Pt for the EOR, and higher than the activity of Pt-alone. However, the Fe3O4@Pt catalysts showed a lower activity for the MOR than Ru Pt and Pt-alone. Durability tests indicated a high electrochemical stability of the Fe3O4 Pt and Ru@Pt nanostructures. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：12681 / 12688

页数：8

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