Navigation Links
When water speaks
Date:2/21/2013

Why certain catalyst materials work more efficiently when they are surrounded by water instead of a gas phase is unclear. RUB chemists have now gleamed some initial answers from computer simulations. They showed that water stabilises specific charge states on the catalyst surface. "The catalyst and the water sort of speak with each other" says Professor Dominik Marx, depicting the underlying complex charge transfer processes. His research group from the Centre for Theoretical Chemistry also calculated how to increase the efficiency of catalytic systems without water by varying pressure and temperature. The researchers describe the results in the journals "Physical Review Letters" and "Journal of Physical Chemistry Letters."

Heterogeneous catalysis: water or gas as the second phase

In heterogeneous catalysis, researchers combine substances with two different phases - usually solid and gas. Chemical reactions work faster at the resulting interfaces than without a catalyst. Industry uses heterogeneous catalysis for many processes, for example to transform alcohols into certain aldehydes. Titanium dioxide with gold particles bonded to the surface, for example, is suitable as the solid phase. Water - instead of a gas - as the second phase has several advantages: environmentally harmful substances which are required in traditional procedures for the oxidation of alcohols can easily be replaced by atmospheric oxygen. Also, the whole reaction in water is very efficient, even at moderate temperatures.

Charge transfer between water and catalyst

The theoretical chemists have studied what happens in the catalysis at the molecular level by means of so-called ab initio molecular dynamics simulations. The result: a charge transfer takes place between the water and the catalyst. Electrons, or more specifically portions of electron densities, are moved between the solid and the liquid phase. The researchers specu
'/>"/>

Contact: Dominik Marx
dominik.marx@rub.de
49-234-322-8083
Ruhr-University Bochum
Source:Eurekalert

Page: 1 2

Related biology news :

1. Ozone treated water v. lethal microbial material
2. Unexpected crustacean diversity discovered in northern freshwater ecosystems
3. New methods for better purification of wastewater
4. Costs for changing pollution criteria in Florida waters likely to exceed EPA estimates
5. Current water resources in Europe and Africa
6. UC research: Tracking Lake Erie water snake in fight against invasive fish
7. Study confirms oil from Deepwater Horizon disaster entered food chain in the Gulf of Mexico
8. Specialization for underwater hearing by the tympanic middle ear of the turtle
9. Study by Haverford College professor reveals unprecedented impact of Deepwater Horizon on deep ocean
10. Increasing water scarcity in Californias Bay-Delta will necessitate trade-offs; hard decisions needed to balance various environmental risks
11. Scientists study the catalytic reactions used by plants to split oxygen from water
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/14/2014)... ability to reliably and safely make in the laboratory all ... one key step closer to reality. , Writing today in ... University of Wisconsin-Madison stem cell researcher Igor Slukvin reports the ... cells and turning them into both red and the array ... research is important because it identifies how nature itself makes ...
(Date:7/13/2014)... of more effective treatments for cachexia, a profound wasting ... all cancer patients, raising their risk of death, according ... have been tried to reverse the condition, which may ... treatments, but none have had great success. , Scientists ... Nature , led by Bruce Spiegelman, PhD, demonstrated ...
(Date:7/11/2014)... many fires burning in eastern New South Wales, Australia ... , At 03:35 UTC on July 11 (12:35 p.m. ... passed over eastern New South Wales (NSW), the Moderate ... image of the region and spotted smoke (light brown) ... thermal bands, are outlined in red. , The New ...
Breaking Biology News(10 mins):Wisconsin scientists find genetic recipe to turn stem cells to blood 2Wisconsin scientists find genetic recipe to turn stem cells to blood 3Antibody halts cancer-related wasting condition 2Antibody halts cancer-related wasting condition 3
... do this has been an abiding mystery in neuroscience and ... area, researchers are taking a closer look at how and ... looks at a particularly striking instance of failure: our impaired ... appears in the Proceedings of the National Academy of ...
... Reid recorded seeing both a male and female ivory-billed ... McKinley Bryans observed a ruby-throated hummingbird in Michigan, noting ... were blooming. These are just two of more than ... in government files. The cards record more than a ...
... release is available in German . , ... this year,s Heinz Maier-Leibnitz Prize, Germany,s top research award for ... of the prize, which has been awarded annually by the ... Ministry of Education and Research since 1977, that the majority ...
Cached Biology News:MIT: Why we have difficulty recognizing faces in photo negatives 2It's for the birds 2It's for the birds 3Heinz Maier-Leibnitz Prizes 2009: Six young researchers recognized for outstanding achievements 2Heinz Maier-Leibnitz Prizes 2009: Six young researchers recognized for outstanding achievements 3Heinz Maier-Leibnitz Prizes 2009: Six young researchers recognized for outstanding achievements 4Heinz Maier-Leibnitz Prizes 2009: Six young researchers recognized for outstanding achievements 5
(Date:7/10/2014)... 2014 On July 9 Prime ... presented Russia,s first national "Industry" ... Company is developing a unique project called MabNext ... a number of innovative drugs based on monoclonal antibodies ... took place at the International Exhibition "Innoprom 2014" in ...
(Date:7/10/2014)... , July 10, 2014 /PRNewswire-iReach/ -- ... and interpretation, today announced an agreement with ... analytics for Lineagen,s NextStep Dx PLUS.  ... neurodevelopmental and neurological disorders, currently offers FirstStep ... (CMA) testing service used by healthcare providers ...
(Date:7/10/2014)... 2014   Ceres, Inc . (Nasdaq: ... today financial results for the three months ended May ... Ceres reported that the company and its ... growing season in Brazil, which concluded in June, despite ... evaluation areas for part of the growing season. Yields ...
(Date:7/10/2014)... Adelaide research may help in the fight against terrorism ... tiny quantities of explosives with the use of light ... Sensors and Actuators B: Chemical , the researchers ... explosives in concentrations as low as 6.3 ppm (parts ... a few minutes. , "Traditionally explosives detection has involved ...
Breaking Biology Technology:Dmitry Medvedev Presented BIOCAD the First National "Industry" Award 2Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 2Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 3Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 4Ceres 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 9Detecting trace amounts of explosives with light 2
... Pity the female fruit fly. Being a looker is simply not ... to act like a girl, even smell like one. Otherwise, you ... most animals, fruit flies must distinguish between a potential mate and ... a female, he,ll court; when he senses the other is a ...
... developed a new measurement-based approach to environmental noise monitoring ... Castle Group, QinetiQ and Hoare Lea Acoustics, and with ... (a Distributed Remote Environmental Array & Monitoring System). ... MEMS (Micro Electro Mechanical Systems) microphones to provide a ...
... the search for the next generation of semiconductors. ... Berkeley National Laboratory (Berkeley Lab) and the University ... layers of the semiconductor indium arsenide onto a ... excellent electronic properties. A member of the IIIV ...
Cached Biology Technology:Battle of the sexes, fruit-fly style 2Novel use of MEMS microphones to map noise pollution and meet EU directives 2Novel use of MEMS microphones to map noise pollution and meet EU directives 3Ultrathin alternative to silicon for future electronics 2Ultrathin alternative to silicon for future electronics 3
Oven mesh sheets, large, 23 x 23cm, pack of 5...
... Phosphatase ( l-PPase) is ... with activity towards phosphorylated ... residues. It is the ... the ORF221 open reading ...
... is a high performance spectral scanning ... incubator. With the advanced SkanIt Software ... for drug discovery assay development. Varioskan ... intensity, time-resolved fluorescence and photometric assays ...
... refrigerated cold traps offers a choice of ... solvents or high volatility solvents. Ideal to ... evaporators. Also used for maintaining vapor-free gas ... in electron microscopes. Can be used as ...
Biology Products: