Navigation Links
Gold-palladium nanoparticles achieve greener, smarter production of hydrogen peroxide
Date:2/19/2009

e been studying the catalytic potential of gold nanoparticles for 15 years, coauthoring four papers in the past four years on the topic for Science and Nature. In 2006, they reported the potential of gold-palladium nanoparticles to oxidize primary alcohols to aldehydes in a more environmentally friendly manner. That reaction is important to the production of spices and perfumes. In 2008, they reported that bilayer clusters of gold nanoparticles measuring about 0.5 nm in diameter were responsible for enabling the oxidation of CO to CO2.

Their research has benefited from the aberration-corrected scanning transmission electron microscopes (STEMs) at Lehigh as well as NIST. Lehigh was the first university in the world to acquire two of the instruments, whose aberration correctors greatly improve imaging resolution and chemical analysis capability by overcoming distortions in the lenses that tend to blur the electron beam.

In the current project, aberration-corrected STEMs at Lehigh and NIST were used to measure the composition and particle size distribution of the gold-palladium alloy, and to understand how they change with various acid-washing pretreatments.

The researchers employed several characterization techniques, including High-Angle Annular Dark Field (HAADF) imaging to measure the change in nanoparticle size and energy-dispersive x-ray (XEDS) analysis to determine the composition of individual alloy particles.

"Without the aberration-corrected STEMs, we would not have been able to unravel what was going on in this instance," says Kiely.

In addition to performing experiments on the gold-palladium catalyst, the researchers ran parallel control experiments on pure gold and pure palladium separately.

"We found it was important for the palladium to incorporate just a small amount of gold," says Kiely. "The gold appears to modify the electronic structure and thus the catalytic activity of the palladium.
'/>"/>

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

Page: 1 2 3 4

Related biology technology :

1. Anthrax vaccine produces immunity with nanoparticles, not needles
2. Anthrax vaccine produces immunity with nanoparticles, not needles
3. DNA technique yields 3-D crystalline organization of nanoparticles
4. Strengthening fluids with nanoparticles
5. All done with mirrors: NIST microscope tracks nanoparticles in 3-D
6. Hydrogen storage in nanoparticles works
7. SACHEM Launches New Products for High Purity Advanced Ceramic Powders : Avanta AC™ Advanced Ceramics Solutions Offer Unique Advantages over Inorganic Bases in the Manufacture of Advanced Ceramic Nanoparticles
8. SACHEM Launches New Products for High Purity Advanced Ceramic Powders : Avanta AC™ Advanced Ceramics Solutions Offer Unique Advantages over Inorganic Bases in the Manufacture of Advanced Ceramic Nanoparticles
9. NC State engineers discover nanoparticles can break on through
10. Engineering nanoparticles for maximum strength
11. Surface plasmon resonances of metal nanoparticles in array can have narrower spectral widths
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/18/2014)... The report "1,6-Hexanediol Market by Application and ... analyzes the global market on the basis of ... details such as the key drivers, current trends ... Browse 81 Market Data Tables and 29 Figures ... “1,6-Hexanediol Market by Application and by Geography - ...
(Date:10/18/2014)... (PRWEB) October 18, 2014 The Asia-Pacific ... concerned market in Asia-Pacific with analysis and forecast of ... and is expected to reach $51,362.6 million by 2018, ... , Browse through the TOC of the Asia-Pacific hardware ... in-depth analysis provided. This also provides a glimpse of ...
(Date:10/18/2014)... 18, 2014 The Asian Electronic Medical Record ... Asian with analysis and forecast of revenue. The electronic medical ... to $2,328.0 million by 2018, at a CAGR of 9.4% ... the Asian Electronic Medical Record (EMR) market, to get an ... glimpse of the segmentation of the market in the same ...
(Date:10/18/2014)... to a new market research report “Hydraulic Fracturing Market ... Forecasts up till 2017”, hydraulic fracturing market will grow ... expected to increase from $40 billion in 2012 to ... same period. North America is expected to lead the ... horse power supplied by the year 2011. , Make ...
Breaking Biology Technology:1,6-Hexanediol Market Projected to Reach $916.1 Million at a CAGR of 8.3% by 2019 – Report by MarketsandMarkets 21,6-Hexanediol Market Projected to Reach $916.1 Million at a CAGR of 8.3% by 2019 – Report by MarketsandMarkets 31,6-Hexanediol Market Projected to Reach $916.1 Million at a CAGR of 8.3% by 2019 – Report by MarketsandMarkets 41,6-Hexanediol Market Projected to Reach $916.1 Million at a CAGR of 8.3% by 2019 – Report by MarketsandMarkets 5The Asia-Pacific hardware encryption display market is expected to reach $51,362.6 million by 2018 - New Report by MicroMarket Monitor 2The Asia-Pacific hardware encryption display market is expected to reach $51,362.6 million by 2018 - New Report by MicroMarket Monitor 3The Asian Electronic Medical Record (EMR) market is estimated to grow to $2,328.0 million by 2018 - New Report by MicroMarket Monitor 2The Asian Electronic Medical Record (EMR) market is estimated to grow to $2,328.0 million by 2018 - New Report by MicroMarket Monitor 3The Asian Electronic Medical Record (EMR) market is estimated to grow to $2,328.0 million by 2018 - New Report by MicroMarket Monitor 4The Asian Electronic Medical Record (EMR) market is estimated to grow to $2,328.0 million by 2018 - New Report by MicroMarket Monitor 5Hydraulic Fracturing Market Projected To Reach $64 Billion by 2017 - New Report by MarketsandMarkets 2Hydraulic Fracturing Market Projected To Reach $64 Billion by 2017 - New Report by MarketsandMarkets 3Hydraulic Fracturing Market Projected To Reach $64 Billion by 2017 - New Report by MarketsandMarkets 4
... (Nasdaq: AMLN ) issued the following statement ... Eastbourne Capital Management, L.L.C., made public earlier today:"After significant ... unable to achieve a settlement with Eastbourne and Carl ... shareholders. Of course, we continue to remain open to ...
... ATLANTA, May 20 Germany will present itself ... locations at this year,s BIO,International Convention. Under the ... will provide invaluable insight into the,latest research results ... The,German research landscape and the regulatory framework conditions ...
... N.C., May 20 Asymchem Laboratories, Inc., a leading ... Products to the pharmaceutical industry, with sites in ... the recent addition of Dr. Chris Huber as ... the table over 15 years experience in the ...
Cached Biology Technology:Amylin Responds to Eastbourne Letter 2Amylin Responds to Eastbourne Letter 3Amylin Responds to Eastbourne Letter 4BIO International Convention 2009: Research Location Germany Presents Potential in Regenerative Medicine 2Dr. Chris Huber Joins Asymchem Laboratories Inc. as Director of Chemical Development 2
(Date:10/17/2014)... To date, antidotes ... doctors are often limited to supportive therapy such as induced ... of drugs involved. So what can be done if a ... professor Jean-Christophe Leroux from the Institute of Pharmaceutical Sciences at ... "The task was to develop an agent that could eliminate ...
(Date:10/16/2014)... efficiently, they are anything but sustainable: environmental damage ... is becoming increasingly evident. Despite their disadvantages, however, ... regarded as the sole possibility of achieving higher ... Bernhard Schmid, an ecology professor at the University ... agriculture and forestry. After all, a new study ...
(Date:10/15/2014)... risk from strains of influenza virus increases with the ... become complacent that the most substantial threats have been ... pandemics arise when a new virus strain – against ... spreads in the human population. There have been five ... of which – the 1918 Spanish Flu – cost ...
Breaking Biology News(10 mins):Emergency aid for overdoses 2Emergency aid for overdoses 3Plant communities produce greater yield than monocultures 2Plant communities produce greater yield than monocultures 3Scientists 'must not become complacent' when assessing pandemic threat from flu viruses 2
... photovoltaic (PV) cells world-wide produced a peak amount of electricity ... located in Europe. Similarly to previous years, this shows the ... new solar systems were installed. By the end of 2009, ... installed) was 16 GW, which is about 70% of the ...
... A surface molecule on bacteria that instructs bone cells ... bone disease, says a scientist speaking at the Society for ... from bacteria could be a way of treating painful bone ... by Meticillin-resistant Staphylococcus aureus (MRSA). Bone disease, ...
... 1. A Low-carb Diet Based on Animal Protein May ... low-carbohydrate diet produces weight loss and improves some cardiovascular ... may depend on the type of protein and fat ... a low-carbohydrate diet for 26 and 20 years respectively. ...
Cached Biology News:Three-quarters of new solar systems worldwide were installed in the EU in 2009 2Three-quarters of new solar systems worldwide were installed in the EU in 2009 3Interrupting death messages to treat bone disease 2Embargoed news from Annals of Internal Medicine 2
... transient, cytoplasmic expression of an N-terminal FLAG® ... or selection marker from bicistronic mRNA. ... and MCS2 for transcription of a single ... is useful for protein-protein interaction studies, multi-subunit ...
...
Mouse monoclonal antibody raised against a partial recombinant SCARB2. NCBI Entrez Gene ID = SCARB2...
Alpha-2-antiplasmin precursor (Alpha-2-plasmin inhibitor) (Alpha-2-PI) (Alpha-2-AP). [Source:Uniprot/SWISSPROT;Acc:P08697] Antigen: Recombinant Protein Epitope Signature Tag (PrEST)....
Biology Products: