Electrochemical characterization of carbon nanotubes for hydrogen storage

I. Lombardi, M. Bestetti, C. Mazzocchia, P. L. Cavallotti, U. Ducati

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

The electrochemical behavior and the reversible hydrogen storage capacity of multiwalled carbon nanotubes (MWNTs) have been investigated both in alkaline (6 M KOH) and acid (0.3 M H 2SO 4) electrolytic solutions by cyclic voltammetry and constant current charge/discharge measurements. Different purification treatments were performed on as-prepared MWNTs to improve hydrogen uptake. About 0.1 wt% of hydrogen was reversibly stored in MWNTs after nitric acid treatment. Vacuum annealing (950°C, 1 h) of MWNTs lowered the electrochemical hydrogen uptake. Finally, electrochemical oxidation of MWNTs at high potentials allowed an increase in hydrogen charge capacity to 0.3 wt%.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume7
Issue number5
DOIs
Publication statusPublished - 2004
Externally publishedYes

ASJC Scopus subject areas

  • Electrochemistry
  • Materials Science(all)

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