A metal dusting process for preparing nano-sized carbon materials and the effects of acid post-treatment on their hydrogen storage performance

Jeng Kuei Chang, Heng Yi Tsai, Wen Ta Tsai

研究成果: Article同行評審

12 引文 斯高帕斯(Scopus)

摘要

The preparation of various nano-sized carbon materials (NCMs) using a metal dusting process, in which a stainless steel coupon and CO-CO2 mixed gas are the only reactants needed, is demonstrated in this study. During the process, fresh Fe-Ni nano-particles, which catalyze the formation of the NCMs, are produced spontaneously and continuously from the steel. The possibility of using multi-wall carbon nanotubes (CNTs) prepared at 600 °C as a hydrogen storage material is studied. Our electrochemical testing results indicate that the obtained CNTs have a hydrogen discharge capacity of as high as 104 mAh/g after being etched in 15 M boiling nitric acid solution for 4 h. However, it was found that prolonging the etching time not only decreases crystallinity but also damages the tubular structure of the CNTs, degrading the hydrogen storage performance.

原文English
頁(從 - 到)6734-6742
頁數9
期刊International Journal of Hydrogen Energy
33
發行號22
DOIs
出版狀態Published - 2008 十一月 1

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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