Graphene-supported platinum and platinum-ruthenium nanoparticles with high electrocatalytic activity for methanol and ethanol oxidation

被引：544

作者：

Dong, Lifeng ^{[1
]}

Gari, Raghavendar Reddy Sanganna ^{[1
]}

Li, Zhou ^{[2
]}

Craig, Michael M. ^{[3
]}

Hou, Shifeng ^{[4
]}

机构：

[1] Missouri State Univ, Dept Phys Astron & Mat Sci, Springfield, MO 65897 USA

[2] Missouri State Univ, Greenwood Lab Sch, Springfield, MO 65897 USA

[3] Missouri State Univ, Dept Biomed Sci, Springfield, MO 65897 USA

[4] Montclair State Univ, Dept Chem & Biochem, Montclair, NJ 07043 USA

来源：

CARBON | 2010年 / 48卷 / 03期

基金：

美国国家科学基金会;

关键词：

CONTAINING CARBON NANOTUBES; FUEL-CELL APPLICATIONS; CATALYTIC-ACTIVITY;

D O I：

10.1016/j.carbon.2009.10.027

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：

In this study, Pt and Pt-Ru nanoparticles were synthesized on graphene sheets and their electrocatalytic activity for methanol and ethanol oxidation was investigated. Experimental results demonstrate that, in comparison to the widely-used Vulcan XC-72R carbon black catalyst supports, graphene-supported Pt and Pt-Ru nanoparticles demonstrate enhanced efficiency for both methanol and ethanol electro-oxidations with regard to diffusion efficiency, oxidation potential, forward oxidation peak current density, and the ratio of the forward peak current density to the reverse peak current density. For instance, the forward peak current density of methanol oxidation for graphene- and carbon black-supported Pt nanoparticles is 19.1 and 9.76 mA/cm(2), respectively; and the ratios are 6.52 and 1.39, respectively; the forward peak current density of ethanol oxidation for graphene- and carbon black-supported Pt nanoparticles is 16.2 and 13.8 mA/cm(2), respectively; and the ratios are 3.66 and 0.90, respectively. These findings favor the use of graphene sheets as catalyst supports for both direct methanol and ethanol fuel cells. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：781 / 787

页数：7

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