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 | |
| Publication status | Published - 2004 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electrochemistry
- Materials Science(all)
Cite this
Electrochemical characterization of carbon nanotubes for hydrogen storage. / Lombardi, I.; Bestetti, M.; Mazzocchia, C.; Cavallotti, P. L.; Ducati, U.
In: Electrochemical and Solid-State Letters, Vol. 7, No. 5, 2004.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochemical characterization of carbon nanotubes for hydrogen storage
AU - Lombardi, I.
AU - Bestetti, M.
AU - Mazzocchia, C.
AU - Cavallotti, P. L.
AU - Ducati, U.
PY - 2004
Y1 - 2004
N2 - 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%.
AB - 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%.
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UR - http://www.scopus.com/inward/citedby.url?scp=2342515393&partnerID=8YFLogxK
U2 - 10.1149/1.1669341
DO - 10.1149/1.1669341
M3 - Article
VL - 7
JO - Electrochemical and Solid-State Letters
JF - Electrochemical and Solid-State Letters
SN - 1099-0062
IS - 5
ER -