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:10/22/2014)... , Oct. 22, 2014  Actavis plc (NYSE: ... and Rhythm, a biopharmaceutical company, today announced that Actavis ... wholly owned subsidiary, Rhythm Health, Inc., which is developing ... of diabetic gastroparesis and other GI functional disorders. ... trial of relamorelin for the treatment of diabetic gastroparesis ...
(Date:10/22/2014)... North American crystal oscillator market report defines and segments ... of revenue. This market was valued at $531.4 million ... by 2018, at a CAGR of 3.3% from 2013 ... North American crystal oscillator market report, to get an ... a glimpse of the segmentation of the market, and ...
(Date:10/22/2014)... (PRWEB) October 22, 2014 Involution ... the release of a new infographic, Understanding Ebola ... create a beautifully designed, easy to follow informative tool ... areas of outbreak, symptoms and prevention. , "As the ... that the 2014 Ebola outbreak represents not only a ...
(Date:10/22/2014)... San Diego, CA (PRWEB) October 22, 2014 ... laboratory balances from Sartorius, A & D Weighing, ... Sartorius CPA Semi-Micro Balance . The Sartorius ... looking for an affordable high-quality, precise, and user-friendly ... in manufacturing of laboratory equipment, their laboratory balances ...
Breaking Biology Technology:Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 2Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 3Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 4Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 5The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 2The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 3The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 4Involution Studios' Ebola Infographic Provides Key Disease Information and Statistics at a Glance 2Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 2Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 3
... - Some of extraterrestrial expert Frank Drake s ... of 300 at the University of Wisconsin-Madison Feb. 19, ... in Mountain View, Calif., explained the reasons why he ... potential methods of communicating with far-off civilizations. , ,I ...
... DEMO and in the weeks since, I've been asked many ... networking. There is, of course, one very practical reason: No ... 2004 timeframe. But that's the easy out. , ,As I've ... fundamental sense. Without a clear avenue to revenue that returns ...
... majority of economists and corporate executives believe that globalization ... it causes. But there is a substantial difference between ... faire attitude towards how this trend affects businesses, communities ... assistant professor of public policy at Rochester Institute of ...
Cached Biology Technology:Alien expert illuminates audience on extraterrestrial possibilities 2Social Networks Revisited 2Social Networks Revisited 3Preservation not protectionism 2Preservation not protectionism 3
(Date:10/16/2014)... be cultivated efficiently, they are anything but sustainable: ... monoculture cultivation is becoming increasingly evident. Despite their ... and are regarded as the sole possibility of ... wrongfully, finds Bernhard Schmid, an ecology professor at ... form of agriculture and forestry. After all, a ...
(Date:10/16/2014)... -- NXT-ID, Inc. (NASDAQ: NXTD and ... focused on the growing mobile commerce market announces that ... Smart Wallet, at the 13 th annual Future ... conference on the intersection of technology and the economy. ... founder and publisher of the Strategic News Service™, the ...
(Date:10/15/2014)... biophysics textbook and it describes how life functions and ... into biological systems and provides an understanding of the ... how our genes make proteins that control the dynamics ... an organism. It quantifies the principles of life and ... on both large and small scales. The book is ...
Breaking Biology News(10 mins):Plant communities produce greater yield than monocultures 2Plant communities produce greater yield than monocultures 3NXT-ID Inc. to Present at 13th Annual FiRe Conference 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 3New book about life as seen from physics 2
... will receive a prestigious mathematics prize in recognition of ... in, the control, design, and optimization of infinite dimensional ... in Mathematics will be awarded to Burns at the ... which will take place in Pittsburgh July 12-16. The ...
... CITY, May 6, 2010 A fission reaction in a ... "application" or software developed by the University of Utah,s Scientific ... or MRI scans now is being used by the university,s ... core on an iPod, iPhone or iPad. Not only ...
... While previous research had suggested that drinking milk was related ... cancer, results of a recent study exploiting the genetic contribution ... be the case. "The data in this study ... drinking in any way," said lead researcher Nicholas Timpson, Ph.D., ...
Cached Biology News:Virginia Tech mathematician wins international award 2Virginia Tech mathematician wins international award 3iPhone goes nuclear 2iPhone goes nuclear 3Milk and risk of renal cell cancer: Genetic research sheds new light 2