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:9/17/2014)... have obtained the first partial genome sequence of an ... at the site of the Montsoriu Castle in Girona, ... closely related to today,s Iberian pig. Researchers also discard ... Iberian pigs. , The study, published in Heredity ... species, and particularly on that of the Iberian breed, ...
(Date:9/17/2014)... September 17, 2014 Researchers at UTSouthwestern Medical ... the circulating protein apolipoprotein E, called apoE3, helps repair ... called apoE4, do not get the benefit of this ... , "We believe that we have identified one mechanism ... why a genetic variant, apoE4, is detrimental," said ...
(Date:9/17/2014)... 1960s. The typical development phases of trees and stands ... as much as 70 percent. This was the outcome ... Universitt Mnchen based on long-term data from experimental forest ... findings were published recently in Nature Communications . ... topic, with the very survival of large forest ecosystems ...
Breaking Biology News(10 mins):Iberian pig genome remains unchanged after 5 centuries 2Protein variant may boost cardiovascular risk by hindering blood vessel repair 2Global change: Trees continue to grow at a faster rate 2Global change: Trees continue to grow at a faster rate 3
... is available in German . , ... , is able to rapidly ,and efficiently detoxify chemical ... the Tokyo subway attacks in 1995. A detailed understanding ... is ,necessary for efforts aiming to improve their properties. ...
... of Canada,s southern Rockies are a more distinct breed ... by University of Calgary researchers that is shedding light ... In a study published in the current issue of ... Design PhD candidate Byron Weckworth and his research group ...
... release is available in French . ... is pleased to announce that Concordia,s Centre for Structural ... research done by nine universities which are part of ... focusing on the conversion of agricultural waste into biofuel ...
Cached Biology News:Structure of enzyme against chemical warfare agents determined 2Mountain caribou's ancient ancestry revealed 2
(Date:9/18/2014)... NY (PRWEB) September 18, 2014 Whitehouse ... negotiations with Salem Realty Group and has acquired an ... space within the Salem Executive Complex adjacent to its ... was held on Friday September 5th. Whitehouse Labs is ... the entire space specifically for package testing. The prime ...
(Date:9/17/2014)... Sept. 17, 2014 /PRNewswire/ - Oncothyreon Inc. (NASDAQ: ... offer and sell shares of its Common Stock and ... underwritten public offerings.  The Series A Convertible Preferred Stock ... Stock, provided that conversion will be prohibited if, as ... own more than 4.99% of the Common Stock then ...
(Date:9/17/2014)... , Sept. 17, 2014  MiMedx Group, Inc. (NASDAQ: ... and marketer of patent protected regenerative biomaterials and ... publication of another peer-reviewed clinical study.    ... Multi-center Randomized Controlled Clinical Trial Evaluating the Use ... Allografts and Multi-layer Compression Therapy vs. Multi-layer Compression ...
(Date:9/17/2014)... 17, 2014 Immunomic Therapeutics, Inc. announced ... (SBIR) grant to support the continued preclinical development of ... with approximately $255,000 over one year to conduct vaccine ... food allergy, affect over one million Americans and are ... Tree nut exposure is also a risk for peanut ...
Breaking Biology Technology:Whitehouse Labs Announces Package Testing Laboratory Expansion 2Whitehouse Labs Announces Package Testing Laboratory Expansion 3Whitehouse Labs Announces Package Testing Laboratory Expansion 4Oncothyreon Announces Proposed Public Offerings 2MiMedx Multi-Center Randomized, Controlled VLU Clinical Study Published In Peer-Reviewed Journal 2MiMedx Multi-Center Randomized, Controlled VLU Clinical Study Published In Peer-Reviewed Journal 3MiMedx Multi-Center Randomized, Controlled VLU Clinical Study Published In Peer-Reviewed Journal 4Immunomic Therapeutics Awarded SBIR Grant to Develop Multi-Nut Allergy Immunotherapy 2Immunomic Therapeutics Awarded SBIR Grant to Develop Multi-Nut Allergy Immunotherapy 3
... 2011 Amylin Pharmaceuticals, Inc. (Nasdaq: ... for 2011, highlighting its continued focus on strong ... Company,s diabetes franchise, notably through advancing the investigational ... other value-driving development programs. Daniel M. Bradbury, president ...
... BioLife Solutions, Inc. (OTC Bulletin Board: BLFS ) ... and Chief Executive Officer Mike Rice, to summarize the continued ... strategic growth initiatives.   (Logo:   http://photos.prnewswire.com/prnh/20090814/BIOLIFELOGO ) ... of $575,000 for the fourth quarter of 2010, an increase ...
... The Jackson Laboratory (JAX), Sackler School of Graduate Biomedical Sciences ... a new mammalian genetics track for Ph.D. students. The joint ... and Tufts. Combining the faculty and resources of the genetics ... the faculty and resources at JAX, with its emphasis on ...
Cached Biology Technology:Amylin to Advance Key Value-Driving Opportunities in 2011 2Amylin to Advance Key Value-Driving Opportunities in 2011 3BioLife Solutions CEO Issues 2010 Corporate Update 2BioLife Solutions CEO Issues 2010 Corporate Update 3The Jackson Laboratory and Tufts University Announce New Ph.D. Track in Mammalian Genetics 2The Jackson Laboratory and Tufts University Announce New Ph.D. Track in Mammalian Genetics 3
... offers major advantages over other RNA precipitation methods ... or carbohydrates. It is the method of choice ... from RNA preparations. Note, LiCl precipitation may not ... If the RNA is to be used for ...
... Antifade Kit is an aqueous-based mounting reagent ... dyes. This formulation of antifade minimizes the ... Blue fluorophores that is often seen with ... available with the blue-fluorescent nucleic acid ...
in vitro Translation, Accessory Products...
Mouse Collagen IV...
Biology Products: