Navigation Links
A paperweight for platinum
Date:2/9/2011

such carbon. In addition, water can degrade the carbon away. Another support option is metal oxides -- think rust -- but what metal oxides make up for in stability and catalyst dispersion, they lose in conductivity and ease of synthesis. Other researchers have begun to explore metal oxides in conjunction with carbon materials to get the best of both worlds.

As a carbon support, Liu and his colleagues thought graphene intriguing. The honeycomb lattice of graphene is porous, electrically conductive and affords a lot of room for platinum atoms to work. First, the team crystallized nanoparticles of the metal oxide known as indium tin oxide -- or ITO -- directly onto specially treated graphene. Then they added platinum nanoparticles to the graphene-ITO and tested the materials.

Platinumweight

The team viewed the materials under high-resolution microscopes at EMSL, DOE's Environmental Molecular Sciences Laboratory on the PNNL campus. The images showed that without ITO, platinum atoms clumped up on the graphene surface. But with ITO, the platinum spread out nicely. Those images also showed catalytic platinum wedged between the nanoparticles and the graphene surface, with the nanoparticles partially sitting on the platinum like a paperweight.

To see how stable this arrangement was, the team performed theoretical calculations of molecular interactions between the graphene, platinum and ITO. This number-crunching on EMSL's Chinook supercomputer showed that the threesome was more stable than the metal oxide alone on graphene or the catalyst alone on graphene.

But stability makes no difference if the catalyst doesn't work. In tests for how well the materials break down oxygen as they would in a fuel cell, the triple-threat packed about 40% more of a wallop than the catalyst alone on graphene or the catalyst alone on other carbon-based supports such as activated carbon.

Last, the team tested how well the new materia
'/>"/>

Contact: Mary Beckman
mary.beckman@pnl.gov
509-375-3688
DOE/Pacific Northwest National Laboratory
Source:Eurekalert  

Page: 1 2 3

Related biology technology :

1. For platinum catalysts, smaller may be better
2. Boston Scientific Begins PLATINUM PLUS Trial for PROMUS(R) Element(TM) Stent System
3. New Class of Platinum-Based Anti-Tumor Drugs, Bisplatinates, Demonstrates Potent Anti-Tumor Activity and Ability to Overcome Resistance to Currently Available Platinum-Based Agents
4. Telik Announces Top-Line Results From Assist-5 Trial of Telcyta(R) in Combination With Pegylated Liposomal Doxorubicin in Platinum Refractory and Resistant Ovarian Cancer
5. Exiqon Announces Positive Clinical Data From EORTC Clinical Trial Showing Oncotech EDR Assay Predicts Resistance to Platinum-Based Therapy in Ovarian Cancer
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A paperweight for platinum
(Date:7/28/2014)... It’s a hard truth: Nearly half of ... their post-secondary education are failing to obtain a diploma or ... And according to an analysis by The Resume Place ... uninformed choice of college majors, which leads to underemployment, unemployment ... Some 51.7 percent of post-9/11 veterans using GI Bill ...
(Date:7/28/2014)... , July 28, 2014 Research and ... Particle Size Analysis Market 2014-2018" report to their offering. ... Particle size analysis is a technique used to determine the ... or liquid. It is crucial to analyze the size of ... Therefore, particle size analysis is performed to determine the behavior ...
(Date:7/25/2014)... 25, 2014 Amgen (NASDAQ: AMGN ... a $0.61 per share dividend for the third quarter ... 5, 2014, to all stockholders of record as of ... About Amgen Amgen is committed to unlocking ... illnesses by discovering, developing, manufacturing and delivering innovative human ...
(Date:7/25/2014)... July 25, 2014 According to a ... Drugs Market - Global Industry Analysis, Size, Share, Growth, ... drugs market is estimated at USD 161,056.5 million in ... of 10.1% from 2014 to 2020, to reach an ... The biological drugs market is witnessing a significant growth ...
Breaking Biology Technology:Resume Place: To Choose the Best College Majors, Veterans Need Early Career Counseling, Data Shows 2Resume Place: To Choose the Best College Majors, Veterans Need Early Career Counseling, Data Shows 3Resume Place: To Choose the Best College Majors, Veterans Need Early Career Counseling, Data Shows 4Global Particle Size Analysis Market 2014-2018 2Amgen Announces 2014 Third Quarter Dividend 2Amgen Announces 2014 Third Quarter Dividend 3Biological Drugs Market: Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2014 - 2020 2Biological Drugs Market: Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2014 - 2020 3
... also reared their heads again-- Lovegate-E and Funlove --spreading concern ... and firewalls up-to-date. , ,"It's no good installing the ... , ,A new virus called Datemake Dialler also made its ... dialer, is programmed to dial a premium-rate telephone line ...
... government uses an emergency room management application that ... potential epidemics, said Dr. Seth Foldy, the city's ... was developed by the Frontlines of Medicine ... medical IT specialists that is marketed by Infinity ...
... weren't the only indicators that biotech in Illinois is ... Illinois Biotechnology Industry Organization (IBIO) elected as ... business development and licensing at Abbott Laboratories ... action is significant because it means Abbott is stepping up ...
Cached Biology Technology:Abbott Executive Jim Tyree Takes IBIO Helm 2Abbott Executive Jim Tyree Takes IBIO Helm 3Abbott Executive Jim Tyree Takes IBIO Helm 4Abbott Executive Jim Tyree Takes IBIO Helm 5Abbott Executive Jim Tyree Takes IBIO Helm 6Abbott Executive Jim Tyree Takes IBIO Helm 7Abbott Executive Jim Tyree Takes IBIO Helm 8
(Date:7/28/2014)... first man to reach the South Pole in December ... team of scientists led by Joe McConnell of Nevada,s ... from industrial activities arrived long before. , Using data ... around the Antarctic continent, including the South Pole, McConnell,s ... date of lead pollution over the Earth,s southernmost continent. ...
(Date:7/27/2014)... largest prevalence studies to date, researchers from the U.K. ... the hepatitis C virus (HCV). Findings published in Hepatology, ... of Liver Diseases, indicate that genotype 1 is the ... of which one-third reside in East Asia. Genotype 3, ... most prevalent, followed by genotypes 2, 4, 6, and ...
(Date:7/27/2014)... global climate change to cut food supplies. But these ... between increasing temperature and air pollution specifically ozone ... new study involving researchers at MIT shows that these ... to take both warming and air pollution into account ... detail at global production of four leading food crops ...
Breaking Biology News(10 mins):Industrial lead pollution beat explorers to the South Pole by 22 years and persists today 2Industrial lead pollution beat explorers to the South Pole by 22 years and persists today 3Hepatitis C virus genotype 1 is most prevalent worldwide 2Study: Climate change and air pollution will combine to curb food supplies 2Study: Climate change and air pollution will combine to curb food supplies 3
... Johns Hopkins researchers report that two proteins best known ... the liver into a sugar-producing factory when food is ... damaging problem in people with diabetes, the proteins' interaction ... the disease, the researchers say. , Under normal circumstances, ...
... the immune system uses to label foreign invaders as ... system can brand foreign proteins by chemically modifying their ... cells known as lymphocytes would recognize the trespassers and ... T cells need to see these types of modifications ...
... a close relative of the Formosan "super termite" that's ... become established in South Florida, according to University of ... pest in tropical areas such as Brazil and the ... threat to Florida until now," said Nan-Yao Su, a ...
Cached Biology News:Future diabetes drugs may target new protein interaction 2Future diabetes drugs may target new protein interaction 3Newly Discovered 'Branding' Process Helps Immune System Cells Pick Their Fights 2Newly Discovered 'Branding' Process Helps Immune System Cells Pick Their Fights 3Cousin of Asian super termite invades Florida 2
HybriWell seals securely to a microscope slide surface in seconds to enclose single or multiple specimens in a small reagent volume and eliminate evaporation....
... Features, Special optically clear polystyrene formulation ... in immunoassay applications , Plates are ... coefficients of variation , Eight-well strips ... strip loss while in use even if ...
...
... StabilZyme SELECT Stabilizer is an aqueous solution ... other non-toxic stabilizing chemicals in a saline ... a combination of 0.02% methylisothiazolone and 0.02% ... Stabilizer is a diluent and stabilizer for ...
Biology Products: