Navigation Links
New information on binding gold particles over metal oxide surfaces
Date:1/22/2013

The strong binding of gold on electronically modified calcium oxide can now be understood in detail. In a computational study, researchers Jenni Andersin, Janne Nevalaita, Karoliina Honkala and Hannu Hkkinen at the University of Jyvskyl Nanoscience Center have shown how redox chemistry entirely determines the adsorption strength of gold on the modified oxide where one metal atom is replaced with molybdenum. The study was funded by the Academy of Finland.

The research team applied the so-called Born-Haber cycle to analyse how different terms contribute to adsorption energy. The calculations were done at the supercomputers of the CSC IT Center of Science by employing quantum mechanical simulation methods.

In the oxide lattice, the molybdenum atom donates two electrons into the oxide. When a gold atom adsorbs on the oxide surface, a redox reaction takes place. In this process, a third electron transferred by the dopant is gained by gold, and energy is released. By varying the dopant among several transition metal atoms, the researchers found that the amount of energy released linearly correlates with the ability of the dopant to give an electron. The trend can be used to estimate how much a guest atom stabilises gold adsorption without calculating the adsorption energy.

The research results are important for understanding catalyst-support interaction. The results fully support the experimental observation where gold nanoparticles have been seen to form flat structures over modified calcium oxide surfaces. A similar Born-Haber cycle, as applied in this study, can also be employed to analyse oxide-catalysed chemical reactions that follow the redox mechanism.

Catalysts are commonly used by industry, for instance, in the production of fuels, plastics, fertilisers and other similar products. Metal oxide surfaces are widely used as support materials for metal catalysts particles. The binding properties and shape of metal nanoparticles sensitively depend on the interaction between the support and the catalyst. By tuning this interaction, it is possible to affect the number and properties of catalytically active sites, or even create new sites. One way to modify the interaction is to dope the oxide with guest metal atoms that can donate extra electrons into a material.


'/>"/>
Contact: Docent Karoliina Honkala
karoliina.honkala@jyu.fi
358-408-053-686
Academy of Finland
Source:Eurekalert  

Related biology technology :

1. New England Biolabs New Website Adds Technical Information, Easy Ordering, and Better Search
2. HealthEconomics.Com Appoints New Director of Information Technology and Operations
3. New "GMO Inside" Campaign Denounces Corporate Disinformation Campaign That Defeated Californias Prop 37
4. Researchers unlock disease information hidden in genomes control circuitry
5. New structural information on functionalization of gold nanoparticles
6. UK research paves way to a scalable device for quantum information processing
7. GenoSpace Announces the Launch of a Cloud-Based "Information Ecosystem" for Advancing 21st-Century Personalized Medicine
8. "Biological Control Industry Overview: Companies & Products" Edition 2 is Here. Critical information for Understanding the Global Biopesticide/Biocontrol Market
9. Quammen Health Care Consultants Takes Over Information Technology Reins at Faith Regional Health Services
10. New England Biolabs Introduces Polbase, an Information Repository of Scientific Data for Polymerase Researchers
11. Lung mucus gel scaffold prevents nanoparticles from getting through
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New information on binding gold particles over metal oxide surfaces
(Date:6/27/2016)... ... June 27, 2016 , ... ... innovative medical technologies, services and solutions to the healthcare market. The company's primary ... various distribution, manufacturing, sales and marketing strategies that are necessary to help companies ...
(Date:6/24/2016)... TOKYO , June 24, 2016  Regular discussions on ... to take place between the two entities said Poloz. ... in Ottawa , he pointed to the ... and the federal government. ... Poloz said, "Both institutions have common economic goals, why not ...
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... ... the release of its second eBook, “Clinical Trials Patient Recruitment and Retention Tips.” ... and retention in this eBook by providing practical tips, tools, and strategies for ...
(Date:6/23/2016)... Md. , June 23, 2016 A person ... from the crime scene to track the criminal down. ... the U.S. Food and Drug Administration (FDA) uses DNA evidence ... Sound far-fetched? It,s not. The FDA ... sequencing to support investigations of foodborne illnesses. Put as simply ...
Breaking Biology Technology:
(Date:4/26/2016)... India and LONDON ... Infosys Finacle, part of EdgeVerve Systems, a product ... and Onegini today announced a partnership to integrate ... solutions.      (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ... to provide their customers enhanced security to access ...
(Date:4/19/2016)... 20, 2016 The new GEZE ... compact web-based "all-in-one" system solution for all door components. ... or the door interface with integration authorization management system, ... systems. The minimal dimensions of the access control and ... building installations offer considerable freedom of design with regard ...
(Date:4/15/2016)... 15, 2016 Research and ... Biometrics Market 2016-2020,"  report to their offering.  , ... , ,The global gait biometrics market is expected ... the period 2016-2020. Gait analysis generates ... be used to compute factors that are not ...
Breaking Biology News(10 mins):