Electrochemical storage of hydrogen in carbon nanotubes

S. R. Chung, K. W. Wang, T. P. Perng

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The electrochemical hydrogenation property of carbon nanotubes (CNTs) was investigated. The CNTs were prepared by different methods, including chemical vapor deposition (CVD) using different catalysts (Co, Ni, etc.) or laser ablation (LA) using Co or Ni catalyst. All of the CNTs contained various amounts of residual metal catalyst. A high discharge capacity of 197 mAh/g of the CVD-Co electrode was obtained, followed by CVD-Ni (48 mAh/g) and LA (36 mAh/g) at room temperature. If the CNTs were purified by HNO3 and similar test was conducted, it was found that the discharge capacities were dramatically reduced. When the purified CNTs were deposited with a controlled amount of metal on the surface, the discharge capacity was improved significantly. It is postulated that the electrochemical hydrogen storage by carbon nanotubes might be influenced by the catalytic effect.

Original languageEnglish
Title of host publication2004 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2004
EditorsM. Laudon, B. Romanowicz
Pages252-255
Number of pages4
StatePublished - 2004
Event2004 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2004 - Boston, MA, United States
Duration: 7 Mar 200411 Mar 2004

Publication series

Name2004 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2004
Volume3

Conference

Conference2004 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2004
Country/TerritoryUnited States
CityBoston, MA
Period7/03/0411/03/04

Keywords

  • Carbon nanotube
  • Catalytic effect
  • Discharge capacity
  • Electrochemical properties

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