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

ng the CO oxidation reaction.

The researchers, using aberration-corrected transmission electron microscopy capable of resolving single gold atoms, also report that a simple change in preparation the drying of the catalyst in flowing rather than static air helps impart to the gold its catalytic capability.

The article, titled "Identification of Active Gold Nanoclusters on Iron Oxide Supports for CO Oxidation," is scheduled to be published in the Sept. 5 issue of Science.

Its authors are Christopher Kiely, director of the Nanocharacterization Laboratory in Lehigh's Center for Advanced Materials and Nanotechnology; Graham Hutchings, Albert Carley and Philip Landon of Cardiff's School of Chemistry; and Andrew Herzing of NIST's Surface and Microanalysis Science Division. Herzing earned a Ph.D. from Lehigh in 2006.

Hutchings and Kiely have collaborated since 1989 and have worked together on gold catalysts since 2000. In this project, Hutchings' group carried out the fabrication and catalytic testing of the gold nanoparticles, and the characterization of the catalyst using x-ray photoelectron spectroscopy (XPS). Kiely's group then used Lehigh's aberration-corrected 2200 JEOL scanning transmission electron microscope (STEM) to examine the gold's nanostructure. Lehigh is currently the only university in the world with two aberration-corrected electron microscopes, which are the world's most powerful instruments for chemical analysis.

The researchers compared two groups of gold nanoparticles. One, dried in static air, was what scientists call a "dead" catalyst with little or no catalytic activity. The other group, dried with flowing air, was a 100-percent-active catalyst for CO oxidation.

On the inactive catalyst, Herzing saw two types of gold species particles larger than 1 nm in size and individual atoms scattered about on the iron-oxide support. On the 100-percent-active catalyst, he found a third species cl
'/>"/>

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:7/10/2014)... July 10, 2014   Ceres, Inc . (Nasdaq: ... company, announced today financial results for the three months ... its business. Ceres reported that the company ... performance this growing season in Brazil, which concluded in ... company,s sorghum evaluation areas for part of the growing ...
(Date:7/10/2014)... June 17, 2014 Using microscopic polymer light ... gases, researchers at MIT,s Quantum Photonics Laboratory have ... in the parts-per-billion range. Optical sensors are ideal ... high signal-to-noise ratio, compact, lightweight nature, and immunity ... sensors had been developed before, the MIT team ...
(Date:7/10/2014)... researchers have observed the fractional quantum Hall effect in ... matter can be tuned by an electric field. ... when electrons confined to thin sheets are exposed to ... behavior where thousands of individual electrons behave as a ... effect is well established, many details of this collective ...
(Date:7/10/2014)... theatergoers have shelled out for crude 3-D glasses, ... viewing experience. These basic devices, used to trick ... may soon be rendered obsolete with the introduction ... University researchers. , TAU doctoral students Yuval Yifat, ... efficient holography based on nanoantennas that could be ...
Breaking Biology Technology:Ceres Announces Fiscal Third Quarter 2014 Financial Results 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 3Ceres Announces Fiscal Third Quarter 2014 Financial Results 4Ceres Announces Fiscal Third Quarter 2014 Financial Results 5Ceres Announces Fiscal Third Quarter 2014 Financial Results 6Ceres Announces Fiscal Third Quarter 2014 Financial Results 7Ceres Announces Fiscal Third Quarter 2014 Financial Results 8Ceres Announces Fiscal Third Quarter 2014 Financial Results 9Swell new sensors 2Columbia researchers observe tunable quantum behavior in bilayer graphene 2Columbia researchers observe tunable quantum behavior in bilayer graphene 3Projecting a 3-dimensional future 2Projecting a 3-dimensional future 3
... ... People, INDIANAPOLIS, Oct. ... it has made the list of Top 20,biopharmaceutical employers, according to the ... in the biotechnology, biopharmaceutical, pharmaceutical and,related industries. This year Lilly ranks number ...
... 10 EntreMed, Inc.,(Nasdaq: ENMD ) a ... cancer and inflammatory diseases,announced today that Thomas H. ... Development, will present a Company,overview at the 16th ... 12-14, 2008 in London, United Kingdom. Mr. Bliss, ...
... dry adhesive got a new competitor this week with a ... by a team of researchers from four U.S. institutions. , ... lizards to scurry up walls and cling to ceilings by ... microscopic branched elastic hairs in their toes that take advantage ...
Cached Biology Technology:Lilly Recognized as One of the World's Top Biopharmaceutical Employers 2EntreMed to Present at BioPartnering Europe Conference 2EntreMed to Present at BioPartnering Europe Conference 3Dry adhesive based on carbon nanotubes gets stronger, with directional gripping ability 2Dry adhesive based on carbon nanotubes gets stronger, with directional gripping ability 3Dry adhesive based on carbon nanotubes gets stronger, with directional gripping ability 4
(Date:7/10/2014)... Sweden , July 7, 2014 ... its first major design win (DW). A Chinese Top 5 ... the planned start of mass production in October 2014.   ... a Chinese Top 5 smartphone OEM, which has a planned ... and a target sales volume for this phone of 3 ...
(Date:7/10/2014)... July 8, 2014 Fingerprint ... new design win (DW). An Asian OEM has selected FPC1021 ... production start in August 2014.   FPC is ... which has a planned date for start of mass production ... order of SEK 5M, for delivery in the first half ...
(Date:7/10/2014)... , July 9, 2014 The widespread ... in large part by meaningful use and related ... providers interact with laboratory information. Now, more than ... field of clinical informatics in order to deliver ... To address the educational needs of pathologists in ...
Breaking Biology News(10 mins):FPC Wins DW for 1021 Touch Sensor for Flagship Smartphone from Chinese Top 5 Smartphone OEM 2FPC Wins DW and Initial Ramp Order for FPC1021 Touch Sensor for Flagship Smartphone from Asian OEM 2New Clinical Informatics Curriculum Prepares Future Pathologists 2New Clinical Informatics Curriculum Prepares Future Pathologists 3New Clinical Informatics Curriculum Prepares Future Pathologists 4
... child-resistant packaging for most medications has contributed to the ... 500,000 calls are made to poison control centers each ... and the number of emergency department visits for unsupervised ... scheduled for publication in The Journal of Pediatrics ...
... into the evolution of microbial communities, an ideal opportunity ... become established and how ecosystems begin to form. Soils ... with time under the influence of multiple environmental factors ... advancements in the science and management of soils. ...
... Chicago,s Field Museum and international collaborators have described a new ... bizarre lower spine on Earth. The interlocking vertebrae of ... more robust relative to body mass, a condition not found ... enigma to evolutionary biologists, with no known adaptive significance. ...
Cached Biology News:Flow restrictors may reduce young children's accidental ingestion of liquid medications 2University of Alberta scientists get dirty at the Robson Glacier 2New species of Hero Shrew found in equatorial Africa 2
... Lipid adsorption and clarification reagent; ... the purification of antibodies, proteins, nucleic ... has negligible cross-reactivity, and improves downstream ... a solid-phase, non-ionic adsorbent supplied as ...
A simple, sensitive and reliable method for determining free sulfhydryl content in peptides, protein...
... Freedom EVO Clinical is Tecans open platform ... enhance quality, safety and performance in the ... is provided by flexible barcode reading and ... mention that the system complies with the ...
... Conjugate Stabilizer is an aqueous solution that ... non-toxic stabilizing chemicals in a MOPS buffer ... This product contains a combination of ... Proclin 300 (Rohm and Haas Company) as ...
Biology Products: