Hydrogen Storage in Aromatic Carbon Ring Based Molecular Materials Decorated with Alkali or Alkali-Earth Metals

2012 ◽  
Vol 116 (48) ◽  
pp. 25286-25292 ◽  
Author(s):  
Igor V. Bodrenko ◽  
Alexander V. Avdeenkov ◽  
Dmitri G. Bessarabov ◽  
Anton V. Bibikov ◽  
Alexander V. Nikolaev ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Molecular Materials ◽  
Aromatic Carbon ◽  
Alkali Earth ◽  
Carbon Ring

scholarly journals Hydrogen Storage in Novel Molecular Materials, Final Report

2006 ◽  
Author(s):  
Viktor V Struzhkin ◽  
Wendy L Mao ◽  
Ho-Kwang Mao ◽  
Burkhard Militzer ◽  
Russell Hemley
Keyword(s):  
Hydrogen Storage ◽  
Final Report ◽  
Molecular Materials

HYDROGEN STORAGE ON NANOFULLERENE CAGES

NANO ◽  
2009 ◽  
Vol 04 (05) ◽  
pp. 253-263 ◽  
Author(s):  
NATARAJAN SATHIYAMOORTHY VENKATARAMANAN ◽  
HIROSHI MIZUSEKI ◽  
YOSHIYUKI KAWAZOE
Keyword(s):  
Hydrogen Storage ◽  
Dipole Interaction ◽  
Binding Energies ◽  
Reversible System ◽  
Storage Medium ◽  
Transition Elements ◽  
Practical Applications ◽  
Alkali Earth ◽  
Induced Dipole ◽  
A Charge

In this paper, we discuss and compare various nanocage materials proposed theoretically as storage medium for hydrogen. Doping of transition elements leads to clustering which reduces the gravimetric density of hydrogen, while doping of alkali and alkali-earth metals on the nanocage materials, such as carborides, boronitride, and boron cages, were stabilized by the charger transfer from the dopant to the nanocage. Further, the alkali or alkali-earth elements exist with a charge, which are found to be responsible for the higher uptake of hydrogen, through a dipole–dipole and change-induced dipole interaction. The binding energies of hydrogen on these systems were found to be in the range of 0.1 eV to 0.2 eV, which are ideal for the practical applications in a reversible system.

Discovering the Mechanism of H2 Adsorption on Aromatic Carbon Nanostructures to Develop Adsorbents for Vehicular Applications

2004 ◽  
Vol 837 ◽  
Author(s):  
A. C. Dillon ◽  
J. L. Blackburn ◽  
P. A. Parilla ◽  
Y. Zhao ◽  
Y-H. Kim ◽  
...  
Keyword(s):  
Binding Energy ◽  
Hydrogen Storage ◽  
Carbon Nanostructures ◽  
Hydrogen Adsorption ◽  
Iron Catalyst ◽  
The United States ◽  
Department Of Energy ◽  
United States Department ◽  
Iron Particles ◽  
Aromatic Carbon

ABSTRACTHydrogen adsorption has been observed with a binding energy of ∼ 50 kJ /mol on as-synthesized carbon multi-wall nanotubes (MWNTs). The MWNTs are virtually free of non-nanotube carbon impurities but contain residual iron catalyst particles. The MWNTs are also highly graphitic. No hydrogen adsorption is observed at near ambient temperatures for purified MWNTs that are free of iron particles. However, hydrogen adsorption is also not observed on bare iron particles even following reduction in the presence of hydrogen at 775 K. These results imply that a special synergy occurs when small iron particles or atoms are in intimate contact with sp2-hybridized aromatic carbon. Interestingly, reducing the as-synthesized MWNTs in H2 at 573 K results in an increased hydrogen capacity. Understanding this hydrogen storage mechanism could facilitate the economical engineering of a hydrogen storage material that meets the United States Department of Energy targets for vehicular fuel cell applications. Recent theoretical studies have shown that an iron ad atom forms a complex with a C36 fullerene and shares charge with four carbon atoms of a bent five-membered ring. Three H2 ligands then coordinate with the iron forming a stable 18-electron organometallic complex. Here the binding energy of the molecular hydrogen ligands is ∼43 kJ /mol. These theoretical results could possibly explain the unique hydrogen storage properties of MWNTs that are grown with an iron catalyst.

The role of lithium in hydrogen storage in aromatic carbon materials

2004 ◽  
Vol 398 (1-3) ◽  
pp. 62-67 ◽  
Author(s):  
Y.L. Zhao ◽  
R.Q. Zhang ◽  
R.S. Wang
Keyword(s):  
Hydrogen Storage ◽  
Carbon Materials ◽  
Aromatic Carbon

Molecular materials based upon organic π-donors and magnetic anions

2000 ◽  
Vol 10 (PR3) ◽  
pp. Pr3-35-Pr3-40 ◽  
Author(s):  
S. Triki ◽  
F. Bérézovsky ◽  
J. Sala Pala ◽  
C. J. Gómez-García ◽  
E. Coronado
Keyword(s):  
Molecular Materials

Effects of Milling and Hydriding-Dehydriding Cycling on the Hydrogen-Storage Behaviors of a Magnesium-Nickel-Tantalum Fluoride Alloy

2015 ◽  
Vol 53 (12) ◽  
pp. 904-910 ◽  
Author(s):  
Myoung Youp Song ◽  
Daniel R. Mumm ◽  
Young Jun Kwak ◽  
Hye Ryoung Park
Keyword(s):  
Hydrogen Storage
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