Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > The search for new materials for hydrogen storage

Four types of materials studied in the dissertation: fullerene C60, carbon nanotubes, metal-organic frameworks (MOFs), and fullerene C60 encapsulated inside carbon nanotubes.
Four types of materials studied in the dissertation: fullerene C60, carbon nanotubes, metal-organic frameworks (MOFs), and fullerene C60 encapsulated inside carbon nanotubes.

Abstract:
Hydrogen is the ideal fuel for new types of fuel cell vehicles, but one problem is how to store hydrogen. In his doctoral dissertation Serhiy Luzan studies new types of materials for hydrogen storage. He also shows that new materials with interesting properties can be synthesized by the reaction of hydrogen with carbon nano-structured materials. The dissertation will be publicly defended on September 28 at Umeå University in Sweden.

The search for new materials for hydrogen storage

Umeå, Sweden | Posted on September 21st, 2012

New car engines that run on hydrogen produce only water as exhaust and are three to four times more efficient than ordinary internal combustion engines. Just one "small" problem is hampering the development of hydrogen-powered vehicles: there is no good method for storing sufficient amounts of hydrogen, as it is a gas of very low density.

Serhiy Luzan devotes the first part of his dissertation to studies of hydrogen storage in exciting new types of materials: metal-organic frameworks (MOFs). They consist of zinc- and cobalt-based metal clusters linked together via organic linkers, and they are extremely porous. One gram of MOF has a hydrogen-absorbing surface that is larger than a football field! Dozens of new MOF materials are synthesized each year, which is highly promising for the next generation of hydrogen storage materials.

Serhiy studied the hydrogen absorption of several new MOFs and researched the effects of different surface areas, pore volumes, and pore forms on the hydrogen storage parameters. MOFs can store record amounts of hydrogen at very low temperatures, but the hydrogen capacity at room temperature is not good enough. Luzan therefore studied new methods to enhance this capacity. Addition of metal catalysts has previously been reported to improve hydrogen storage considerably.

"But in my study, the effect of metal catalysts addition on hydrogen absorption in MOFs was not confirmed," says Serhihy Luzan.

Hydrogen is of interest not only as a fuel but also for chemical modification of nano-structured carbon materials, such as carbon nanotubes, fullerenes, and graphene. Graphene is a single layer of carbon atoms. Carbon nanotubes also consist of pure carbon, in the form of graphene layers rolled into a cylinder. Fullerene, C60, consist of sixty carbon atoms arranged in five- or six-vertices figures, just like the pattern on a soccer ball. There are carbon materials that are stronger than steel, conduct current better than copper, and diffuse heat better than diamond.

In the second part of the dissertation Luzan describes the materials he created by the reaction of hydrogen with fullerenes and carbon nanotubes.

Luzan studied the reaction between fullerene C60 and hydrogen at elevated temperatures and hydrogen pressures, with and without the addition of metal catalysts. The reaction resulted in the formation of hydrogenated fullerenes, C60Hx. Upon extended hydrogen treatment, the fullerene structure fragmented and collapsed. This outcome shows that it is possible to break down fullerenes stepwise into smaller cup-like molecules, which are stabilized by hydrogen atoms. This is a structure that was previously difficult to achieve.

"With this method, we should be able to use fullerenes as a relatively inexpensive source material for creating new molecules that hopefully would retain interesting properties from the original carbon nano-material," says Serhihy Luzan.

Hydrogenated graphene (graphane) is expected to be an ideal material for new carbon-based electronics, but graphane is difficult to synthesize by a direct reaction between graphene and hydrogen. It is much easier first to hydrogenate carbon nanotubes and then to cut them along the tube axis into so-called nanoribbons, which have hydrogen covalently bonded to the surface.

Luzan's experiments showed that the reaction between single-wall carbon nanotubes and hydrogen is possible if a suitable catalyst is used, and he was able to observe that some of the nanotubes were converted to graphene or graphane nanoribbons.

About the public defense:

On Friday, September 28, Serhiy Luzan, Department of Physics, will defend his thesis titled: Materials for hydrogen storage and synthesis of new materials by hydrogenation. Title in Swedish: Material för vätelagring och syntes av nya material genom hydrering.

The public defense will take place at 1:00, p.m. in room N300.

The external examiner is Prof. Dr. Yaroslav Filinchuk, Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Louvain-la-Neuve, Belgium.

Read the whole or parts of the dissertation at:

urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-58663

####

For more information, please click here

Contacts:
David Meyers
+46 (0)90- 786 98 95

Copyright © AlphaGalileo

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Creation of 'Rocker' protein opens way for new smart molecules in medicine, other fields December 18th, 2014

How does enzymatic pretreatment affect the nanostructure and reaction space of lignocellulosic biomass? December 18th, 2014

Silicon Valley-Based Foresight Valuation Launches STR-IP™, a New Initiative for Startups to Discover the Value of Their Intellectual Property December 18th, 2014

Iranian Scientists Use Nanotechnology to Increase Power, Energy of Supercapacitors December 18th, 2014

Graphene

Pb islands in a sea of graphene magnetise the material of the future December 16th, 2014

Graphene Applied in Production of Recyclable Electrodes December 13th, 2014

Nanoshaping method points to future manufacturing technology December 11th, 2014

Defects are perfect in laser-induced graphene: Rice University lab discovers simple way to make material for energy storage, electronics December 10th, 2014

Nanotubes/Buckyballs

A sponge-like molecular cage for purification of fullerenes December 15th, 2014

'Trojan horse' proteins used to target hard-to-reach cancers: Scientists at Brunel University London have found a way of targeting hard-to-reach cancers and degenerative diseases using nanoparticles, but without causing the damaging side effects the treatment normally brings December 11th, 2014

Detecting gases wirelessly and cheaply: New sensor can transmit information on hazardous chemicals or food spoilage to a smartphone December 8th, 2014

Green meets nano: Scientists at TU Darmstadt create multifunctional nanotubes using nontoxic materials December 3rd, 2014

Discoveries

Creation of 'Rocker' protein opens way for new smart molecules in medicine, other fields December 18th, 2014

How does enzymatic pretreatment affect the nanostructure and reaction space of lignocellulosic biomass? December 18th, 2014

Iranian Scientists Use Nanotechnology to Increase Power, Energy of Supercapacitors December 18th, 2014

Iranian Researchers Produce Electrical Pieces Usable in Human Body December 18th, 2014

Announcements

Creation of 'Rocker' protein opens way for new smart molecules in medicine, other fields December 18th, 2014

How does enzymatic pretreatment affect the nanostructure and reaction space of lignocellulosic biomass? December 18th, 2014

Silicon Valley-Based Foresight Valuation Launches STR-IP™, a New Initiative for Startups to Discover the Value of Their Intellectual Property December 18th, 2014

Iranian Scientists Use Nanotechnology to Increase Power, Energy of Supercapacitors December 18th, 2014

Energy

How does enzymatic pretreatment affect the nanostructure and reaction space of lignocellulosic biomass? December 18th, 2014

Iranian Scientists Use Nanotechnology to Increase Power, Energy of Supercapacitors December 18th, 2014

Lifeboat Foundation gives 2014 Guardian Award to Elon Musk December 16th, 2014

Stacking two-dimensional materials may lower cost of semiconductor devices December 11th, 2014

Automotive/Transportation

Lifeboat Foundation gives 2014 Guardian Award to Elon Musk December 16th, 2014

The gold standard December 9th, 2014

Nanocatalysts Can Reduce Pollution Caused by Diesel Engines December 4th, 2014

NEI introduces NANOMYTE® SuperAi, a Durable Anti-ice Coating December 4th, 2014

Fuel Cells

Toward a low-cost 'artificial leaf' that produces clean hydrogen fuel December 3rd, 2014

Single-atom gold catalysts may offer path to low-cost production of fuel and chemicals November 28th, 2014

National Synchrotron Light Source II Achieves 'First Light' October 23rd, 2014

Unique catalysts for hydrogen fuel cells synthesized in ordinary kitchen microwave oven October 14th, 2014

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE