Investigation of Further Improvement of Platinum Catalyst Durability with Highly Graphitized Carbon Nanotubes Support

详细信息    查看全文

• 作者：Jiajun Wang ; Geping Yin ; Yuyan Shao ; Zhenbo Wang ; Yunzhi Gao
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：April 17, 2008
• 年：2008
• 卷：112
• 期：15
• 页码：5784 - 5789
• 全文大小：319K
• 年卷期：v.112,no.15(April 17, 2008)
• ISSN：1932-7455

文摘

The highly graphitized multiwalled carbon nanotubes (HG-MWCNT) were obtained by heat treatment at2800 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 indicatedthat the obtained HG-MWCNT had a high degree of graphitization (95.3%), while it was only 39.5% for theas-obtained CVD-MWCNT. Electrochemical investigation suggested that the HG-MWCNT had a lowercorrosion 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 catalystwas discussed. The results revealed that Pt/HG-MWCNT using the highly graphitized carbon nanotubes asthe supporting material had a higher electrochemical stability, which is due to the lower corrosion rate ofHG-MWCNT and the stronger interaction between metal and carbon support.