TY - JOUR
T1 - Hydrogen storage in sonicated carbon materials
AU - Hirscher, M.
AU - Becher, M.
AU - Haluska, M.
AU - Dettlaff-Weglikowska, U.
AU - Quintel, A.
AU - Duesberg, G.S.
AU - Choi, Y.J.
AU - Downes, P.
AU - Hulman, M.
AU - Roth, S.
AU - Stepanek, I.
AU - Bernier, P.
PY - 2001
Y1 - 2001
N2 - The hydrogen storage in purified single-wall carbon nanotubes (SWNTs), graphite and diamond powder was investigated at room temperature and ambient pressure. The samples were sonicated in 5 M HNO3 for various periods of time using an ultrasonic probe of the alloy Ti-6Al-4V. The goal of this treatment was to open the carbon nanotubes. The maximum value of overall hydrogen storage was found to be 1.5 wt¿%, as determined by thermal desorption spectroscopy. The storage capacity increases with sonication time. The sonication treatment introduces particles of the Ti alloy into the samples, as shown by X-ray diffraction, transmission electron microscopy, and chemical analysis. All of the hydrogen uptake can be explained by the assumption that the hydrogen is only stored in the Ti-alloy particles. The presence of Ti-alloy particles does not allow the determination of whether a small amount of hydrogen possibly is stored in the SWNTs themselves, and the fraction of nanotubes opened by the sonication treatment is unknown.
AB - The hydrogen storage in purified single-wall carbon nanotubes (SWNTs), graphite and diamond powder was investigated at room temperature and ambient pressure. The samples were sonicated in 5 M HNO3 for various periods of time using an ultrasonic probe of the alloy Ti-6Al-4V. The goal of this treatment was to open the carbon nanotubes. The maximum value of overall hydrogen storage was found to be 1.5 wt¿%, as determined by thermal desorption spectroscopy. The storage capacity increases with sonication time. The sonication treatment introduces particles of the Ti alloy into the samples, as shown by X-ray diffraction, transmission electron microscopy, and chemical analysis. All of the hydrogen uptake can be explained by the assumption that the hydrogen is only stored in the Ti-alloy particles. The presence of Ti-alloy particles does not allow the determination of whether a small amount of hydrogen possibly is stored in the SWNTs themselves, and the fraction of nanotubes opened by the sonication treatment is unknown.
U2 - 10.1007/s003390100816
DO - 10.1007/s003390100816
M3 - Article
SN - 0947-8396
VL - 72
SP - 129
EP - 132
JO - Applied Physics A: Materials Science & Processing
JF - Applied Physics A: Materials Science & Processing
IS - 2
ER -