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

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)343-350
Number of pages8
JournalDiamond and Related Materials
Volume20
Issue number3
DOIs
Publication statusPublished - 2011 Mar 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Fabrication of CNTs with controlled diameters and their applications as electrocatalyst supports for DMFC'. Together they form a unique fingerprint.

  • Cite this