Fabrication of CNTs with controlled diameters and their applications as electrocatalyst supports for DMFC

An Ya Lo, Ningya Yu, Shing Jong Huang, Chin Te Hung, Shou Heng Liu, Zhibin Lei, Cheng Tzu Kuo, Shang Bin Liu

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)

摘要

A facile synthesis procedure based on chemical vapor deposition (CVD) process has been developed to fabricate carbon nanotubes (CNTs) with controlled diameters and high yields utilizing Fe-containing ordered hexagonal mesoporous silicas (HMSs) such as MCM-41 and SBA-15 having varied pore sizes as the catalysts as well as the templates. It is found that unlike Fe/HMS catalysts prepared by co-precipitation method, samples prepared by the impregnation method gave rise to multi-wall CNTs with uniform diameters, which were largely dictated by the pore size of the Fe/HMS catalysts. Among these uniform MWCNTs, sample with a larger diameter (≥ 8 nm) was found to be more favorable as support for Pt catalyst, leading to a homogeneous dispersion of metal nanoparticles. Consequently, the Pt/CNT electrocatalysts so prepared gave rise to superior methanol oxidation activities as well as tolerances for CO poisoning compared to Pt supported on commercial single-wall CNT (Pt/SWCNT) and XC-72 activated carbon (Pt/XC-72) having a similar metal loading.

原文English
頁(從 - 到)343-350
頁數8
期刊Diamond and Related Materials
20
發行號3
DOIs
出版狀態Published - 2011 3月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 一般化學
  • 機械工業
  • 材料化學
  • 電氣與電子工程

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