Navigation Links
Oxidation mechanisms at gold nanoclusters unraveled
Date:10/8/2010

the cluster boundary (see Figure). The oxygen atoms in these chains are negatively and the gold atoms positively charged, creating a system that is reminiscent to a one-dimensional gold-oxide chain. These chains are expected to be the highly catalytically active part towards conversion of carbon monoxide to carbon dioxide at room temperature.

Researchers Pentti Frondelius, Hannu Hkkinen and Karoliina Honkala have studied monolayer-thick gold clusters with 10-20 atoms, supported by thin magnesium oxide films that were grown on silver metal. These systems can be prepared experimentally, and last year the Jyvskyl group published a joint study with Professor Hans-Joachim Freund from the Fritz-Haber Institute in Berlin to characterize atomic and electronic structures of gold clusters in such systems (see http://prl.aps.org/abstract/PRL/v102/i20/e206801).

Intensive experimental work since the early 1980s has indicated that gold nanoparticles exhibit unexpected catalytic activity towards many industrially important chemical reactions that involve activation of atomic bonds inside oxygen or hydrocarbon molecules. Room-temperature formation of carbon dioxide (CO2) from carbon monoxide (CO) and oxygen molecule (O2) is one of the most extensively studied processes. A number of different factors have been suggested to contribute to the ability of gold particles to activate the O-O bond, which is considered to be the key reaction step.

"The study now published provides us with a new approach to the problem. The formation of gold oxide, that is, the oxidation of gold, is in contradiction with the known properties of macroscopic gold metal. On the nanometer scale, however, everything seems to be possible," Professor Hkkinen says.


'/>"/>

Contact: Hannu Hkkinen
hannu.j.hakkinen@jyu.fi
358-014-260-4719
Academy of Finland
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Titanium coating with protein flower bouquet nanoclusters strengthens implant attachment
2. Controlling the size of nanoclusters
3. Mysterious charge transport in self-assembled monolayer transistors unraveled
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Oxidation mechanisms at gold nanoclusters unraveled
(Date:3/26/2015)... 26, 2015 ReliantHeart, Inc., an innovative ... a supplier of precision transit-time flow measurement solutions, are ... improve the efficiency of the HeartAssist5® Left ... to experience greater mobility and peace of mind. ... flow board, will draw 1/6th of the power required ...
(Date:3/25/2015)... is one of the most attractive in the emerging ... a growing economy and increasing government investment in healthcare, ... Russian market is set to grow at twice the ... around 10-15% annually reaching an approximate market value of ... Green Cross provides total healthcare solutions that ...
(Date:3/25/2015)... 25, 2015 The surging prevalence ... have fuelled social media growth, with over 50% ... in social networking. Insurance companies are making use ... clients and promote a diversity of their services ... increasingly exploiting social networking services as part of ...
(Date:3/25/2015)... Mass. and REYKJAVIK, Iceland , ... capabilities for using the genome to create better medicine, today ... the largest studies of whole-genome data yet undertaken. ... Nature Genetics – are built around the most ... a team of deCODE scientists led by Kari Stefansson ...
Breaking Biology Technology:LVAD patients to have greater mobility and peace of mind through Transonic and ReliantHeart’s True Flow collaboration for the HeartAssist5® 2LVAD patients to have greater mobility and peace of mind through Transonic and ReliantHeart’s True Flow collaboration for the HeartAssist5® 3Social Media Role in Global Insurance Industry Examined by Timetric in New Market Research Report Published at MarketPublishers.com 2Social Media Role in Global Insurance Industry Examined by Timetric in New Market Research Report Published at MarketPublishers.com 3Landmark deCODE Studies Demonstrate the Power of Truly Big Genomics for Improving Medicine Worldwide 2
... approval, revolutionary CiTop™ product-line is now available in Israel. Ovalum Ltd., ... clearance to market of its unique CiTop™ product-line in Israel. ... ... Ltd., a privately held Israeli medical device company, has announced today ...
... WuXi PharmaTech (NYSE:,WX), a leading pharmaceutical, biotechnology and medical ... and the United,States, today announced that it was awarded ... its CEO Dr. Ge Li was named one of ... the 8th China,Enterprise Innovation Forum held in Beijing last ...
... 2 Health Systems Implement Diagnosis Decision Support & Knowledge ... ... July 10 Isabel Healthcare, a leading,provider of diagnosis decision ... Midelfort-Mayo Health System, Eau Claire,WI and Children,s Hospitals and Clinics ...
Cached Biology Technology:Ovalum Ltd. Received Clearance to Market the CiTop™ Product-Line in Israel 2WuXi PharmaTech (NYSE: WX) Named the Most Innovative Company in China and CEO Dr. Li the Most Innovative Leader of Chinese Enterprises 2Isabel Healthcare Adds Hospitals in Wisconsin & Minnesota 2
(Date:3/26/2015)... , March 26, 2015 The ... social, recreation and athletic club, today announced it has ... allow freedom of movement for members and staff, while ... a comprehensive process, we selected FST,s IMID Access system ... convenience for our members and staff, in addition to ...
(Date:3/24/2015)... Research and Markets ( http://www.researchandmarkets.com/research/hdgz7h/global_iris ) ... Recognition Market 2015-2019" report to their offering. ... to grow at a CAGR of 23.5 percent over ... present scenario and the growth prospects of the Global ... the market size, the report considers the revenue generated ...
(Date:3/24/2015)... --Research and Markets ( http://www.researchandmarkets.com/research/kvdtcw/face_and_voice ) has announced the ... Business Report" report to their offering. This report ... Thousands by the following Segments: Face Biometrics, and Voice Biometrics. The ... , Japan , Europe ... & Africa , and Latin ...
Breaking Biology News(10 mins):Granite Club First Private Club in North America to Implement FST Biometrics Secure Access Solution, as Part of Multi-million Dollar Expansion 2Global Iris Recognition Market 2015-2019 with 3M Cogent, Bioenable Technologies, Cross Match Technology, Iris ID Systems & Safran Dominating 2Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 2Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 3Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 4Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 5Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 6
... study of its kind, researchers have used tools of paleontology ... chemicals. They have shown that during the evolution of these ... rarer, harder to synthesise forms, giving pointers that will help ... the fossil record has allowed the study of the evolution ...
... of the immune systemcapable of targeting proteins associated with ... biomedical research, the development of diagnostic tests and for ... however, has often been a difficult, costly and laborious ... the Biodesign Institute at Arizona State University have developed ...
... DNA construction, also known as DNA cloning or recombinant DNA ... one of the principal tools of modern biotechnology, used for ... and the development of advanced biofuels. A number of software ... Hillson, a biochemist at the U.S. Department of Energy (DOE),s ...
Cached Biology News:Nature reaches for the high-hanging fruit 2Improved method for capturing proteins holds promise for biomedical research 2Improved method for capturing proteins holds promise for biomedical research 3DNA construction software saves time, resources and money 2DNA construction software saves time, resources and money 3DNA construction software saves time, resources and money 4
... Lyophilized. Lyophilized from 2 mM sodium ... human liver. Cathepsin D is a major ... as a 52 kDa proenzyme. Overexpression of ... associated with higher risk of relapse and ...
Rat Hepatocytes (RH) (>3,000,000 cells)...
... 10X Automation Buffer is a concentrated formulation ... autostainers employing capillary action technology, as well ... in collaboration with David Brigati M.D., Department ... OK. This buffer is recommended for all ...
... users requiring mass detection but not ... TOF Mass spectrometer is ideally suited ... for high performance mass analysis. ... analysis, protein detection, micro-satellite DNA characterization ...
Biology Products: