Navigation Links
Scientists peel away the mystery behind gold's catalytic prowess
Date:9/5/2008

Few materials have exercised as much of a hold on the human imagination, or on human history, as has gold.

But for all of its popular uses money, medals, jewelry and more gold's potential as a catalyst lay hidden until the 1980s, when Masatake Haruta and Graham Hutchings independently discovered that gold, which had long been considered inactive, could be an extraordinarily good catalyst. Haruta demonstrated the low-temperature oxidation of CO and Hutchings the hydrochlorination of acetylene to vinyl chloride.

Gold particles measuring less than 5 nanometers in diameter possess a high level of catalytic activity when they are deposited on metal-oxide supports, Haruta learned. One nanometer (nm) is equal to one one-billionth of a meter, or about the width of five atoms.

In particular, Haruta found that gold nanoparticles are effective at catalyzing the critical conversion of toxic carbon monoxide (CO) into more benign carbon dioxide (CO2) at room temperature and even at temperatures as low as -76 degrees C. CO oxidation is vital to firefighters and others who must enter burning buildings, and it is also critical to the protection of hydrogen fuel cells from CO contamination.

In the two decades since Haruta's discovery, scientists have sought to determine exactly how gold nanoparticles function as catalysts.

Now, researchers from Lehigh University in Bethlehem, Pa., and Cardiff University in the UK believe they have pinpointed the active species at which the critical oxidation reaction occurs when gold is supported on iron oxide.

In an article to be published in Science, the premier scientific journal in the U.S., researchers from Lehigh University in Bethlehem, Pa.; Cardiff University in Wales, and the National Institute of Standards and Technology (NIST) report that bilayer clusters measuring about one-half nanometer in diameter and containing only about 10 gold atoms are responsible for triggeri
'/>"/>

Contact: Kurt Pfitzer
kap4@lehigh.edu
610-758-3017
Lehigh University
Source:Eurekalert

Page: 1 2 3 4

Related biology technology :

1. The National Cancer Institute Joins the Global Community of Scientists Now Using BIOMARKERcenter From Thomson Reuters
2. Scientists grow nanonets able to snare added energy transfer
3. University of Pennsylvania scientists move optical computing closer to reality
4. City of Hope Helps KGI Launch New Management Training Program for Scientists
5. Clemson scientists put a (nano) spring in their step
6. Penn scientists carve functional nanoribbons using super-heated, nano-sized particles of iron
7. Penn scientists demonstrate potential of graphene films as next-generation transistors
8. Scientists demonstrate highly directional semiconductor lasers
9. Conference to Turn Scientists of Color into PA-Based Entrepreneurs Set for November
10. Project Mind Survey of Israeli Ph.D. Scientists Favors a New Standard of Creativity in Science
11. Virtual world is sign of future for scientists, engineers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/14/2014)... As pet owners drew up their lists of New Year,s ... better care of my furry companion." Nowadays there are pet salons, ... cases to take the little canine or feline darlings along wherever ... buy some pricey toys at the pet store. But anyone who ...
(Date:1/14/2014)... 14, 2014 The largest international professional organization ... and therapeutic derivatives thereof has endorsed an educational ... about the challenges of adulterated herb and botanical ... The Society for Medicinal Plant and ...
(Date:1/14/2014)... MA (PRWEB) January 14, 2014 iLab Solutions, ... Detwiler as the new Director of Product Strategy. In this ... well as iLab sub-teams to guide in the development of ... iLab provides the maximum possible benefit to the scientific community ...
(Date:1/14/2014)... Mass. , Jan. 14, 2014  RXi Pharmaceuticals ... discovering, developing and commercializing innovative therapies addressing major ... that it received the Notice of Allowance from ... its unique self-delivering RNAi compounds (sd-rxRNA®), for the ...
Breaking Biology Technology:New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 3World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 4World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 5World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 6World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 7World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 8iLab Solutions Announces Michelle Detwiler as the New Director of Product Strategy 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 3
... National Stem,Cell Holding, Inc. (OTC: NHGI.PK) today ... a newly discovered group of,biomaterials, derived from the ... stimulate a variety of naturally occurring physiological,mechanisms that ... and repair,itself . These newly discovered biomaterials ...
... 15 /PRNewswire-FirstCall/ - Helix BioPharma Corp.,(TSX: HBP / Frankfurt: ... as Chairman and a director of the Company to ... involvement with the Company since its,amalgamation in 1995," said ... the Company, I thank him for his positive,contributions and ...
... 15 Senex Biotechnology, Inc. presented,today new results ... International,Conference on Alzheimer,s Disease Drug Discovery in New ... the identification of the first,drug candidates that block ... involved in Alzheimer,s disease, including: amyloid,precursor protein (APP); ...
Cached Biology Technology:National Stem Cell Holding Announces Patent Application for Newly Discovered Cellular Derived Biomaterials for Anti-Aging Applications 2National Stem Cell Holding Announces Patent Application for Newly Discovered Cellular Derived Biomaterials for Anti-Aging Applications 3Helix BioPharma Chairman resigns 2Senex Biotechnology Announces Presentation of Alzheimer's Disease Drug Discovery Effort 2Senex Biotechnology Announces Presentation of Alzheimer's Disease Drug Discovery Effort 3
(Date:4/17/2014)... Ill. A drug under clinical trials to treat ... broad-spectrum drugs that act against various bacteria, fungal infections ... by University of Illinois chemists and collaborators. , Led ... team determined the different ways the drug SQ109 attacks ... to target other pathogens from yeast to malaria ...
(Date:4/17/2014)... study suggests that fish consumption advisories for expecting ... long-lived contaminants like persistent organic pollutants (POPs). ... researchers including University of Toronto Scarborough PhD student ... how different levels of environmental contamination, a mother,s ... in the body influenced exposure in her children. ...
(Date:4/17/2014)... State University engineer has developed a patented technique ... explosive devices. The same technique could help police ... M. and Kay L. Theede chair in engineering ... and his research team have created a template-based ... car trunks. The distance detection method called ...
Breaking Biology News(10 mins):Multitarget TB drug could treat other diseases, evade resistance 2Fish consumption advisories fail to cover all types of contaminants 2Patented research remotely detects nitrogen-rich explosives 2
... 2011 MedNet Solutions, a global life sciences ... systems, is pleased to announce the latest release ... solution.  The ENLIGHTEN system, which provides ... capture (EDC) and clinical trial management system (CTMS), ...
... life on Mars could get easier with a creative adaption ... on the robotic arm of a space rover., In a ... Space Science , a team of researchers propose adding a ... instrument, the mass spectrometer, to analyze the surfaces of rocks ...
... discovered that the animal with the most genes--about 31,000--is ... By comparison, humans have about 23,000 genes. Daphnia ... The water flea,s genome is described in a ... of the Daphnia Genomics Consortium, an international network of ...
Cached Biology News:MedNet Solutions Announces Significant Enhancements to ENLIGHTEN, Its Flagship EDC / eClinical Solution 2Tool makes search for Martian life easier 2Tool makes search for Martian life easier 3The most genes in an animal? Tiny crustacean holds the record 2The most genes in an animal? Tiny crustacean holds the record 3
PlusOne EDTA, disodium salt, 100 g. Category: Electrophoresis Systems & Standards & Reagents, Electrophoresis Standards and Reagents, Buffers....
Human/Mouse/Rat p38 alpha Affinity Purified PAb...
XBP1 Antibody...
Recombinant Mouse LIGHT/TNFSF14...
Biology Products: