Navigation Links
Temporary storage for electrons: Natural method of producing hydrogen
Date:11/2/2012

Scientists at the Max Planck Institute for Chemical Energy Conversion (MPI CEC) and the Ruhr-Universitt Bochum (RUB) have found through spectroscopic investigations on a hydrogen-producing enzyme that the environment of the catalytic site acts as an electron reservoir in the enzyme. Thus, it can very efficiently produce hydrogen, which has great potential as a renewable energy source. The research team describes their results in the journal "Angewandte Chemie".

Producing hydrogen with enzymes

The system analysed constitutes an enzyme that catalyses the formation and conversion of hydrogen. In its centre it has a double-iron core, and is therefore also called [FeFe] hydrogenase. Hydrogenases are of great interest for energy research, since they can efficiently produce hydrogen. However, new catalysts can only be developed given a deep understanding of their mode of action.

Electron transfer in several steps

In hydrogen production, two electrons get together with two protons. The research team showed that, as expected, the first electron is initially transferred to the iron centre of the enzyme. The second transfer on the other hand is to an iron-sulphur cluster that is located in the periphery. It thus forms a temporary storage for the second electron. This "super-reduced" state may be responsible for the extremely high efficiency of the hydrogenase. Subsequently both electrons are transferred in one step from the enzyme to the protons, so that hydrogen is generated. "Only the use of two different spectroscopic techniques made the discovery possible", says Agnieszka Adamska, a doctoral student at MPI CEC who carried out the spectroscopic studies.

10,000 molecules of hydrogen per second

"Up to 10,000 molecules of hydrogen per second can be generated by a single [FeFe] centre", says Camilla Lambertz, a postdoc at the RUB who prepared the biological samples for the project. The enzyme is thus among the most efficient hydrogenases and is therefore also being intensively investigated by biologists and chemists with a view to achieving environmentally friendly hydrogen production. The complete mechanism of hydrogen formation is, however, complex and several steps need to be clarified. Next, the researchers at MPI CEC and the Ruhr-Universitt Bochum aim to use sensitive spectroscopic methods to locate the proton to which the two electrons are transferred. This negatively charged hydrogen atom (hydride) reacts with another proton to form hydrogen. Inspired by the [FeFe] hydrogenase, the researchers would like to develop their own hydrogen-producing catalysts that could be used for the generation of hydrogen.


'/>"/>

Contact: Dr. Camilla Lambertz
camilla.lambertz@rub.de
49-234-322-4496
Ruhr-University Bochum
Source:Eurekalert

Related biology news :

1. AVT Develops Biometrically Secure Medicine Storage and Retrieval System for Medbox RX
2. Medbox Safe Storage and Access Lockers Gaining Popularity
3. Medbox Developing a Patent Pending Wall-Mounted Biometric Kiosk for Storage of Sensitive Medicine Samples and Supplies for Doctors Offices.
4. Research provides new insights into dogs natural feeding behavior and finds they target a daily dietary intake that is high in fat
5. Study: DNA barcoding can ID natural health products
6. Scientists reveal how natural antibiotic kills tuberculosis bacterium
7. Natural regeneration building urban forests, altering species composition
8. Carnegie Mellon study shows skin-aging radicals age naturally formed particles in the air
9. Ben-Gurion University of the Negev receives $450,000 grant to conduct oil and natural gas research
10. Eco-computer with a natural wood look
11. Health care savings, naturally
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/22/2017)... , March 21, 2017 Vigilant ... company serving law enforcement agencies, announced today the appointment ... as director of public safety business development. ... law enforcement experience, including a focus on the aviation ... his most recent position, Mr. Sheridan served as the ...
(Date:3/13/2017)... March 13, 2017 Future of security: Biometric Face Matching ... ... DERMALOGs Face Matching enables to match face pictures against each ... to identify individuals. (PRNewsFoto/Dermalog Identification Systems) ... DERMALOG,s "Face Matching" is the fastest software for biometric Face Matching on ...
(Date:3/7/2017)... SALT LAKE CITY , March 7, 2017 /PRNewswire/ ... solutions that help top global companies identify the best ... Leonard as Chief Sales Officer (CSO) and ... and Kucer,s appointments round out a seasoned executive team poised ... year and beyond, building on a year of record ...
Breaking Biology News(10 mins):
(Date:4/26/2017)... ... 2017 , ... NextSteps 2017, NetDimensions’ annual global user conference, ... May on the following dates: , ?    London, UK from May 10-11, ?    New Orleans, ... Performance Institute will be the opening keynote speaker at the NextSteps EMEA ...
(Date:4/25/2017)... ... ... As part of the Stago EdVantage Virtual University Virtual Event, ... order to illuminate this clinical problem for people unfamiliar with the topic. , DIC ... high degree of morbidity and mortality. DIC is a confusing disorder from both diagnostic ...
(Date:4/25/2017)... , April 25, 2017 ... has licensed its novel immune-modulating technology to an undisclosed ... and allergy. Tregitopes, pronounced T·rej·itopes, are ... immunoglobulin by EpiVax CEO Annie De Groot ... intravenous immunoglobulin G, an autoimmune disease therapy, Tregitopes ...
(Date:4/25/2017)... , ... April 25, 2017 , ... Leaders of ... Quorum, will be featured in multiple sessions at this week’s Association of Clinical ... trends to best practices in clinical research. , "We are excited to present subject ...
Breaking Biology Technology: