Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The role of titanium in hydrogen storage

02.09.2005


As part of ongoing research to make hydrogen a mainstream source of clean, renewable energy, scientists from the U.S. Department of Energy’s Brookhaven National Laboratory have determined how titanium atoms help hydrogen atoms attach to an aluminum surface. Their study isolates the role of titanium, which is used as a catalyst in the crucial first step to trap hydrogen within a particular class of hydrogen-storage materials. The work may also help identify and develop similar hydrogen-storage systems.



Brookhaven chemist Santanu Chaudhuri will present this research at the 230th national meeting of the American Chemical Society in Washington, D.C. The talk is scheduled for Thursday, September 1, at 3:40 p.m. in room 142 of the Washington Convention Center.

To be a mainstream source of fuel, hydrogen must be stored safely and efficiently. Conventional high-pressure storage tanks can be dangerous and are too big and heavy for certain applications, such as hydrogen-based fuel cells in automobiles. Hydrogen-storage materials, however, incorporate hydrogen safely and compactly, and temporarily hold large quantities of it that can be recovered easily under safe, controlled conditions.


"A hydrogen-storage material must be able to store hydrogen quickly under ’normal’ conditions -- that is, without very high temperatures and pressures," said Chaudhuri. "In tiny amounts, an appropriate catalyst, such as titanium, can speed up the reaction and make the hydrogen-storage process suitable for practical applications. Our study has helped us better understand the role of these catalysts."

Through this research, Chaudhuri and his collaborator, Brookhaven chemist James Muckerman, hope to improve the performance of sodium alanate, a hydrogen-storage material composed of sodium and aluminum hydride. Sodium alanate, known as a "complex metal hydride," expels hydrogen gas (the fuel) and aluminum when heated, leaving a mixture of sodium hydride and metallic aluminum. But because neither aluminum nor sodium hydride absorb hydrogen well, putting the hydrogen back in -- to reform sodium alanate and allow reuse of the material -- becomes difficult.

"We found that aluminum absorbs significantly more hydrogen -- and does so more quickly and at lower temperatures -- when a small number of titanium atoms are incorporated into its surface," Chaudhuri said.

Chaudhuri and Muckerman created a computer model that provides a plausible mechanism of the reaction. Their model agrees with an experimental x-ray absorption study of sodium alanate, performed at the National Synchrotron Light Source, a facility at Brookhaven that produces x-ray, ultraviolet, and infrared light for research. Chaudhuri and Muckerman’s collaborators at Brookhaven used x-rays to "see" and thus calculate how the titanium atoms subtly changed the atomic-level structure of the aluminum, resulting in a more hydrogen-absorbent surface. Results from these two studies agree on the role of titanium atoms on an aluminum surface and mechanisms of subsequent steps in hydrogen capture.

In the future, Chaudhuri and Muckerman’s group plans to study the subsequent steps in the sodium alanate hydrogen-storage process, in which aluminum and hydrogen react with sodium hydride to reform the starting material.

Laura Mgrdichian | EurekAlert!
Further information:
http://www.bnl.gov

More articles from Power and Electrical Engineering:

nachricht Linear potentiometer LRW2/3 - Maximum precision with many measuring points
17.05.2017 | WayCon Positionsmesstechnik GmbH

nachricht First flat lens for immersion microscope provides alternative to centuries-old technique
17.05.2017 | Harvard John A. Paulson School of Engineering and Applied Sciences

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

How herpesviruses win the footrace against the immune system

26.05.2017 | Life Sciences

Water forms 'spine of hydration' around DNA, group finds

26.05.2017 | Life Sciences

First Juno science results supported by University of Leicester's Jupiter 'forecast'

26.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>