Electrochemical characterization of carbon nanotubes for hydrogen storage

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

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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 language	English
Journal	Electrochemical and Solid-State Letters
Volume	7
Issue number	5
DOIs	https://doi.org/10.1149/1.1669341
Publication status	Published - 2004
Externally published	Yes

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ASJC Scopus subject areas

Electrochemistry
Materials Science(all)

Cite this

Lombardi, I., Bestetti, M., Mazzocchia, C., Cavallotti, P. L., & Ducati, U. (2004). Electrochemical characterization of carbon nanotubes for hydrogen storage. Electrochemical and Solid-State Letters, 7(5). https://doi.org/10.1149/1.1669341

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10.1149/1.1669341