Hydrogen adsorption on N-decorated single wall carbon nanotubes

2009 ◽  
Vol 373 (30) ◽  
pp. 2588-2591 ◽  
Author(s):  
Eduardo Rangel ◽  
Gregorio Ruiz-Chavarria ◽  
L.F. Magana ◽  
J.S. Arellano
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Adsorption ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon

Enhanced hydrogen adsorption on single-wall carbon nanotubes by sample reduction

2004 ◽  
Vol 108 (1-2) ◽  
pp. 120-123 ◽  
Author(s):  
M CALLEJAS ◽  
A ANSON ◽  
A BENITO ◽  
W MASER ◽  
J FIERRO ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Adsorption ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon

Hydrogen adsorption studies on single wall carbon nanotubes

Carbon ◽  
2004 ◽  
Vol 42 (7) ◽  
pp. 1243-1248 ◽  
Author(s):  
A. Ansón ◽  
M.A. Callejas ◽  
A.M. Benito ◽  
W.K. Maser ◽  
M.T. Izquierdo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Adsorption ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Adsorption Studies

Electrochemical Hydrogen Adsorption/Storage in Pure and Functionalized Single Wall Carbon Nanotubes

2004 ◽  
Vol 837 ◽  
Author(s):  
Yubing Wang ◽  
Zafar Iqbal
Keyword(s):  
Carbon Nanotubes ◽  
Charge Transfer ◽  
Hydrogen Adsorption ◽  
Hydrogen Uptake ◽  
Weight Percent ◽  
Ex Situ ◽  
Single Wall Carbon Nanotubes ◽  
Adsorbed Hydrogen ◽  
Single Wall Carbon ◽  
Temperature Range

AbstractSelf-assembled sheets of single wall carbon nanotubes (SWNTs) were used as the working electrode for electrochemical hydrogen adsorption/storage in a three-electrode cell in 6M aqueous KOH or HNO3 solution. Hydrogen adsorption studies on pristine SWNTs, as well as SWNTs functionalized with electrodeposited nanoparticles of magnesium (Mg) and cobalt (Co), have been performed. The adsorbed hydrogen (uncorrected for possible water uptake via nanocapillarity) was measured to be 2.5 weight percent by thermogravimetric analysis (TGA) on a Mg-functionalized sample and 3.2 weight percent by Prompt-Gamma Activation Analysis (PGAA) for a pristine sample charged for 20 hrs. Weight loss occurs in the 105° to 125°C temperature range for both sample types. Hydrogen in Co-functionalized SWNTs and 6M HNO3 electrolyte appears to be strongly chemisorbed as indicated by the appearance of a C-H stretching line in the Fourier-transform infrared spectrum (FTIR) and absence of a desorption peak in the TGA data in the 25° to 600°C temperature range. Thermopower measurements scale with the TGA data and suggest that hydrogen uptake is associated with partial charge transfer. Ex-situ Raman spectroscopy shows a reproducible downshift of the SWNT tangential stretching mode consistent with charge transfer or chemisorption on electrochemical charging, and a substantial decrease under some conditions in resonance-enhanced intensity with increasing charging time. A SWNT sheet electrochemically coated with the conducting polymer polyaniline and then charged in 6M KOH shows possible hydrogen uptake of 1.5 weight % that desorbs at 70°C.

Thermal, Chemical and Radiation Treatment Influence on Hydrogen Adsorption Capability in Single Wall Carbon Nanotubes

2011 ◽  
Vol 1284 ◽  
Author(s):  
Michail Obolensky ◽  
Andrew Kravchenko ◽  
Vladimir Beletsky ◽  
Yuri Petrusenko ◽  
Valeriy Borysenko ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electron Beam ◽  
Ball Mill ◽  
Room Temperature ◽  
Hydrogen Adsorption ◽  
Radiation Treatment ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Volumetric Methods ◽  
Adsorption Capability

ABSTRACTThe raw single wall carbon nanotubes (SWCNT) were chemically and thermally treated and then milled in ball mill. After this SWCNT were irradiated by electron beam with energy 2.3 MeV up to fluence 1014 e-/cm2 at room temperature. Then SWCNT were saturated with hydrogen at pressure 5 bar and quenching down to the temperature 78 K. The sorption capability was measured by means of mass-spectroscopy and volumetric methods. The double increasing of mass hydrogen content in electron bombarded SWCNT was showed comparatively with non-irradiated samples.

scholarly journals Investigation of Hydrogen Adsorption on Single Wall Carbon Nanotubes

2012 ◽  
Vol 32 ◽  
pp. 279-284 ◽  
Author(s):  
Sang-Hun Nam ◽  
Seong Hun Jeong ◽  
Soon-Bo Lee ◽  
Jin-Hyo Boo
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Adsorption ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon
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