Navigation Links
Controlling the size of nanoclusters: First step in making new catalysts
Date:7/9/2008

UPTON, NY Researchers from the U.S. Department of Energy's (DOE) Brookhaven National Laboratory and Stony Brook University have developed a new instrument that allows them to control the size of nanoclusters groups of 10 to 100 atoms with atomic precision. They created a model nanocatalyst of molybdenum sulfide, the first step in developing the next generation of materials to be used in hydrodesulfurization, a process that removes sulfur from natural gas and petroleum products to reduce pollution.

As reported in the July 9, 2008 online edition of the Journal of Physical Chemistry C, the scientists made size-selected molybdenum sulfide nanoclusters as gaseous ions, and then gently deposited the clusters on a gold surface. The nanoclusters interact weakly with the gold support and therefore remain intact.

"With this new instrument, we can control how many and what type of atoms are in a nanocluster," said Brookhaven chemist Michael White, the principal author of the paper. "This knowledge enables us to make nanoclusters with predetermined size, structure and chemical composition, all which are important for the design of new catalysts."

Currently, molybdenum sulfide nanoparticles are used for hydrodesulfurization and other chemical processes, but it is not known what size is most active or how the reactions occur on small particles. The ability to make model nanocatalysts containing molybdenum sulfide particles of variable size and chemical makeup will allow White and coworkers to understand how current catalysts work and help design the next generation of catalysts.

In the current research, the scientists explored the chemical reactivity of a very stable or "magic" cluster of four atoms of molybdenum and six atoms of sulfur deposited on a gold surface. This small nanocluster is thought to be prototypical of active catalyst particles because all the molybdenum metal atoms are exposed and therefore can react with other molecules. Exploring larger and more reactive nanoclusters will be the next step.

"This was a study to test the capabilities of the newly built instrument," White said. "Now we can do further studies with different nanoclusters to find those that are most reactive and therefore best suited as models for making the most efficient nanocatalysts."


'/>"/>

Contact: Diane Greenberg
greenb@bnl.gov
631-344-2347
DOE/Brookhaven National Laboratory
Source:Eurekalert

Related biology technology :

1. ProMetic to obtain controlling stake in Pathogen Removal and Diagnostic Technologies Inc.
2. Gladstone scientists identify role of tiny RNAs in controlling stem cell fate
3. Presentation of North Americas First Certificate for BS 25999, the New Standard for Business Continuity
4. Delaware Valley Innovation Network Awards First Innovation Investment Grant to the Wistar Institute
5. Forest Laboratories, Inc. Sets Date and Conference Call for Fiscal 2009 First Quarter Earnings
6. Edmonton to be site of worlds first industrial scale municipal waste-to-ethanol facility
7. ActivBiotics Assignee Issues First Distribution of Cash to Creditors
8. HemoCue Receives First FDA CLIA Waiver in Diagnostics Industry for Quantitative Point-of-Care Test for Microalbuminuria, a Kidney and Cardiovascular Disease Risk Marker
9. Start of First Fingertip Payment Pilot in the Netherlands
10. First semiconductor-based PET scanner demonstrates potential to aid in early diagnosis of disease
11. Aegera Therapeutics collaboration with Human Genome Sciences leads to the initiation of a Phase 1 clinical trial with lead IAP inhibitor HGS1029 and receipt of first milestone payment
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/11/2017)... ... 11, 2017 , ... Disappearing forests and increased emissions are the main causes ... each year. Especially those living in larger cities are affected by air pollution related ... the most pollution-affected countries globally - decided to take action. , “I knew I ...
(Date:10/10/2017)... (PRWEB) , ... October 10, 2017 , ... San Diego-based ... of its corporate rebranding initiative announced today. The bold new look is part ... as the company moves into a significant growth period. , It will also expand ...
(Date:10/10/2017)... ... October 10, 2017 , ... Dr. Bob Harman, founder and CEO of ... Club. The event entitled “Stem Cells and Their Regenerative Powers,” was ... Dr. Harman, DVM, MPVM was joined by two human doctors: Peter B. Hanson, M.D., ...
(Date:10/10/2017)... (PRWEB) , ... October 10, 2017 , ... ... innovation and business process optimization firm for the life sciences and healthcare industries, ... conference in San Francisco. , The presentation, “Automating GxP Validation for Agile ...
Breaking Biology Technology:
(Date:6/30/2017)... Va. , June 30, 2017 ... leading developer and supplier of face and eye ... ATA Featured Product provider program. ... an innovative way to monitor a driver,s attentiveness ... greatly from being able to detect fatigue and ...
(Date:5/16/2017)... , May 16, 2017   Bridge ... health organizations, and MD EMR Systems , ... development partner for GE, have established a partnership ... Portal product and the GE Centricity™ products, including ... EMR. These new integrations will ...
(Date:4/17/2017)... April 17, 2017 NXT-ID, Inc. (NASDAQ: ... the filing of its 2016 Annual Report on Form 10-K on ... ... is available in the Investor Relations section of the Company,s website ... SEC,s website at http://www.sec.gov . 2016 Year Highlights: ...
Breaking Biology News(10 mins):