Carbon nanofibres (CNFs) were prepared by catalytic decomposition of gaseous ethylene on NiCu/H-ZSM-5. They were characterized by XRD and TEM techniques. Dehydrogenation characteristics of LiAlH4 admixed with CNFs and Vulcan XC72R were studied and compared with that of pure lithium aluminium hydride. The results show that CNFs have prominent effect on the dehydrogenation properties of LiAlH4. On the basis of the dehydrogenation characteristics, a possible mechanism for the dehydriding of LiAlH4 upon addition of carbon materials has been considered. © 2007 International Association for Hydrogen Energy.

L. Hima Kumar

Balasubramanian Viswanathan

Catalyst activity

decomposition

Dehydrogenation

Ethylene

Hydrogen storage

Transmission electron microscopy

ALANATES

CATALYTIC DECOMPOSITION

LITHIUM ALUMINUM HYDRIDE

Carbon nanofibers

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

International Journal of Hydrogen Energy

Nitrogen-doped graphene and carbon nanotubes were prepared and employed as additives to NaAlH4 to facilitate hydrogenation and dehydrogenation reactions. The decomposition behavior of carbon nanomaterial admixed NaAlH 4 was studied by constant temperature desorption, differential scanning calorimetry and in situ FT-IR experiments. Carbon nanomaterials decrease the dehydrogenation temperature of NaAlH4 and enhance the dehydrogenation kinetics by lowering the activation energy. A reversible hydrogen storage of 1.8 wt% was achieved by the nitrogen-doped carbon nanotube/nitrogen-doped graphene admixed sodium aluminum hydride. © 2013 The Royal Society of Chemistry.

Journal of Materials Chemistry A

Catalytic effects of nitrogen-doped graphene and carbon nanotube additives on hydrogen storage properties of sodium alanate

Single step production of DIPE as oxygenates from acetone feed stock was evaluated by employing Ni-Cu and Ni-Cu-Cr supported on H-zeolite-β catalysts. The influence of experimental parameters like effect of amount of catalyst loading, hydrogen pressure, reduction temperature of the precursor, volume of acetone and temperature on DIPE production is studied. Ni-Cu (25 wt.%) metal supported on H-zeolite-β catalyst shows higher activity. The dependence of the yield of DIPE on the other loadings has also been studied. The reduction temperature of the catalyst precursor is found to be less significant above 573 K. A moderate reaction temperature in the range of 433-453 K and hydrogen pressure (30-80 bar) favor the higher yield of DIPE. Ni-Cu-Cr/H-zeolite-β is also found to be active for the production of DIPE from acetone. © 2006 Elsevier B.V. All rights reserved.

Applied Catalysis B: Environmental

Single step catalytic production of diisopropyl ether (DIPE) from acetone feedstock over nickel based catalysts

Carbon materials should have specific centers for hydrogen adsorption/absorption. The Universal Force Field and Density Functional Theory have been used to find the role of heteroatom substitution in carbon nanotubes as an activator. The effect of various heteroatoms like nitrogen, phosphorus, sulphur and boron for hydrogen activation and their geometrical positions has been identified for easy hydrogenation. This will be one of the possible centers where hydrogen adsorption/absorption is initiated. © 2006 Elsevier Ltd. All rights reserved.

Carbon

The role of heteroatoms in carbon nanotubes for hydrogen storage

Journal of Alloys and Compounds

Investigations on hydrogen storage behavior of CNT doped NaAlH4

Effect of graphite as a co-dopant on the dehydrogenation and hydrogenation kinetics of Ti-doped sodium aluminum hydride

Nanotechnology

The catalytic effect of single-wall carbon nanotubes on the hydrogen sorption properties of sodium alanates

Dehydriding behaviour of LiAlH4-the catalytic role of carbon nanofibres

Journal	International Journal of Hydrogen Energy
ISSN	03603199
Open Access	No