Investigation of further improvement of platinum catalyst durability with highly graphitized carbon nanotubes support

被引：132

作者：

Wang, Jiajun ^{[1
]}

Yin, Geping ^{[1
]}

Shao, Yuyan ^{[1
]}

Wang, Zhenbo ^{[1
]}

Gao, Yunzhi ^{[1
]}

机构：

[1] Harbin Inst Technol, Dept Appl Chem, Lab Electrochem, Harbin 150001, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 15期

关键词：

D O I：

10.1021/jp800186p

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：

The highly graphitized multiwalled carbon nanotubes (HG-MWCNT) were obtained by heat treatment at 2800 degrees C upon the as-obtained chemically vapor deposited multiwalled carbon nanotubes (CVD-MWCNT). The graphitization behavior was studied by X-ray diffraction and Raman spectroscopy. The results indicated that the obtained HG-MWCNT had a high degree of graphitization (95.3%), while it was only 39.5% for the as-obtained CVD-MWCNT. Electrochemical investigation suggested that the HG-MWCNT had a lower corrosion rate than the original MWCNT, which can be attributed to the less surface defects on the HG-MWCNT with the increase of the graphitization degree. The durability of the corresponding Pt/CNT catalyst was discussed. The results revealed that Pt/HG-MWCNT using the highly graphitized carbon nanotubes as the supporting material had a higher electrochemical stability, which is due to the lower corrosion rate of HG-MWCNT and the stronger interaction between metal and carbon support.

引用

页码：5784 / 5789

页数：6

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