Supercritical Carbon-Dioxide-Assisted Deposition of Pt Nanoparticles on Graphene Sheets and Their Application as an Electrocatalyst for Direct Methanol Fuel Cells

被引:70
|
作者
Zhao, Jian [1 ,2 ,3 ,4 ]
Zhang, Liqing [1 ,2 ,3 ,4 ]
Chen, Tao [5 ]
Yu, Hui [1 ,2 ,3 ,4 ]
Zhang, Lin [1 ,2 ,3 ,4 ]
Xue, Hao [1 ,2 ,3 ,4 ]
Hu, Haiqing [1 ,2 ,3 ,4 ]
机构
[1] Qingdao Univ Sci & Technol, Shandong Prov Key Lab Rubber Plast, Minist Educ, Key Lab Rubber Plast, Qingdao 266042, Peoples R China
[2] Hangzhou Normal Univ, Key Lab Organosilicon Chem, Hangzhou 31001, Peoples R China
[3] Hangzhou Normal Univ, Mat Technol Minist Educ, Hangzhou 31001, Peoples R China
[4] Fudan Univ, Minist Educ, Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China
[5] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Peoples R China
来源
JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 40期
基金
中国国家自然科学基金;
关键词
METAL NANOPARTICLES; CATALYSTS; FLUID; NANOTUBES; OXIDATION; PERFORMANCE; NANOFIBERS; OXIDE; RU; PD;
D O I
10.1021/jp3061976
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
A combination of graphene with metal particles is particularly attractive due to the enhanced performance of the hybrid materials. However, direct loading of uniform metal nanoparticles such as Pt on graphene remains a challenge due to the hydrophobic nature of graphene. We herein demonstrate that Pt nanoparticles with uniform size and high dispersion were deposited on graphene surfaces via a facile and efficient supercritical fluid method. The graphene sheets used in this work were produced by rapid thermal expansion of graphite oxide. With the help of supercritical carbon dioxide (SC CO2), Pt nanoparticles with a mean size of 3.28 nm are evenly distributed on graphene upon the reduction of an organic platinum precursor. The electrocatalytic investigations reveal that the current density of methanol electrooxidation with the resultant Pt/graphene catalyst was similar to 3.5 times as large as that observed with conventional Pt/carbon black (Vulcan XC-72) catalyst. The results demonstrate that graphene serves as an excellent electrocatalytic carrier, and the supercritical fluid strategy is powerful and promising for the synthesis of highly active electrocatalysts for direct methanol fuel cells.
引用
收藏
页码:21374 / 21381
页数:8
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