Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Synthetic Catalyst Mimics Nature's 'Hydrogen Economy'

02.06.2009
By creating a model of the active site found in a naturally occurring enzyme, chemists at the University of Illinois have described a catalyst that acts like nature’s most pervasive hydrogen processor.

The researchers describe their work in a paper accepted for publication in the Journal of the American Chemical Society, and posted on the journal’s Web site.

Scientists have long been puzzled by nature’s ability to use cheap and plentiful building blocks – iron, nickel and sulfur – to achieve the catalytic performance seen in rare and expensive metals. In particular, two enzymes – iron-iron hydrogenase and nickel-iron hydrogenase – function as hydrogen processors, much like platinum.

“Nature relies on a very elaborate architecture to support its own ‘hydrogen economy,’ ” said Thomas B. Rauchfuss, a professor of chemistry and corresponding author of the paper. “We cracked that design by generating mock-ups of the catalytic site to include the substrate hydrogen atom.”

The researchers’ model of the nickel-iron complex is the first to include a bridging hydride ligand, an essential component of the catalyst.

“By better understanding the mechanism in the nickel-iron hydrogenase active site, we are learning how to develop new kinds of synthetic catalysts that may be useful in other applications,” said graduate student Bryan E. Barton, lead author of the paper.

“The study of hydrogenases offers plenty of potential glamour – such as the hydrogen economy, green energy and bio-fuel cells – but the lasting breakthroughs result from manipulable mechanistic models like ours,” said graduate student and co-author Matthew Whaley. “By building a model that contains a hydride ligand, we have proven that the behavior of these natural catalysts can be understood and optimized.”

University of Illinois crystallographer Danielle L. Gray also is a co-author of the paper.

The work was supported by the U.S. National Institutes of Health.

Editor’s note: To reach Thomas Rauchfuss, call 217-333-7355; e-mail:
rauchfuz@illinois.edu.
To view or subscribe to the RSS feed for Science News at Illinois, go to: http://webtools.uiuc.edu/rssManager/608/rss.xml.

James E. Kloeppel | Newswise Science News
Further information:
http://www.illinois.edu

More articles from Life Sciences:

nachricht New contents: Neuronal Parkinson inclusions are different than expected
26.06.2019 | Universität Basel

nachricht An ion channel with a doorkeeper: The pH of calcium ions controls ion channel opening
25.06.2019 | Johannes Gutenberg-Universität Mainz

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fraunhofer IDMT demonstrates its method for acoustic quality inspection at »Sensor+Test 2019« in Nürnberg

From June 25th to 27th 2019, the Fraunhofer Institute for Digital Media Technology IDMT in Ilmenau (Germany) will be presenting a new solution for acoustic quality inspection allowing contact-free, non-destructive testing of manufactured parts and components. The method which has reached Technology Readiness Level 6 already, is currently being successfully tested in practical use together with a number of industrial partners.

Reducing machine downtime, manufacturing defects, and excessive scrap

Im Focus: Successfully Tested in Praxis: Bidirectional Sensor Technology Optimizes Laser Material Deposition

The quality of additively manufactured components depends not only on the manufacturing process, but also on the inline process control. The process control ensures a reliable coating process because it detects deviations from the target geometry immediately. At LASER World of PHOTONICS 2019, the Fraunhofer Institute for Laser Technology ILT will be demonstrating how well bi-directional sensor technology can already be used for Laser Material Deposition (LMD) in combination with commercial optics at booth A2.431.

Fraunhofer ILT has been developing optical sensor technology specifically for production measurement technology for around 10 years. In particular, its »bd-1«...

Im Focus: The hidden structure of the periodic system

The well-known representation of chemical elements is just one example of how objects can be arranged and classified

The periodic table of elements that most chemistry books depict is only one special case. This tabular overview of the chemical elements, which goes back to...

Im Focus: MPSD team discovers light-induced ferroelectricity in strontium titanate

Light can be used not only to measure materials’ properties, but also to change them. Especially interesting are those cases in which the function of a material can be modified, such as its ability to conduct electricity or to store information in its magnetic state. A team led by Andrea Cavalleri from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg used terahertz frequency light pulses to transform a non-ferroelectric material into a ferroelectric one.

Ferroelectricity is a state in which the constituent lattice “looks” in one specific direction, forming a macroscopic electrical polarisation. The ability to...

Im Focus: Determining the Earth’s gravity field more accurately than ever before

Researchers at TU Graz calculate the most accurate gravity field determination of the Earth using 1.16 billion satellite measurements. This yields valuable knowledge for climate research.

The Earth’s gravity fluctuates from place to place. Geodesists use this phenomenon to observe geodynamic and climatological processes. Using...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on UV LED Technologies & Applications – ICULTA 2020 | Call for Abstracts

24.06.2019 | Event News

SEMANTiCS 2019 brings together industry leaders and data scientists in Karlsruhe

29.04.2019 | Event News

Revered mathematicians and computer scientists converge with 200 young researchers in Heidelberg!

17.04.2019 | Event News

 
Latest News

Shell increases versatility of nanowires

26.06.2019 | Materials Sciences

Hubble finds tiny 'electric soccer balls' in space, helps solve interstellar mystery

26.06.2019 | Physics and Astronomy

New combination therapy established as safe and effective for prostate cancer

26.06.2019 | Health and Medicine

VideoLinks
Science & Research
Overview of more VideoLinks >>>