Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Designing a better catalyst for ’artificial photosynthesis’

10.09.2003


Scientists studying the conversion of carbon dioxide (CO2) to carbon monoxide (CO) -- a crucial step in transforming CO2 to useful organic compounds such as methanol -- are trying to mimic what plants do when they convert CO2 and water to carbohydrates and oxygen in the presence of chlorophyll and sunlight. Such "artificial photosynthesis" could produce inexpensive fuels and raw materials for the chemical industry from renewable solar energy. But achieving this goal is no simple task.



"Nature has found a way to do this over eons," says Etsuko Fujita, a chemist at the Department of Energy’s Brookhaven National Laboratory. "It’s very complicated chemistry."

Nature uses chlorophyll as a light absorber and electron-transfer agent. However, chlorophyll does not directly react with CO2. If you take it out of the plant and place it in an artificial system, it decomposes rather quickly, resulting in only a small amount of CO production.


So Fujita and others trying to mimic photosynthesis have turned to artificial catalysts made from robust transition metal complexes such as rhenium complexes. These catalysts absorb solar energy and transfer electrons to CO2, releasing CO. But until now, no one had explained how these processes work in detail. By studying these reactions over very short and long timescales (ranging from 10-8 seconds to hours), Fujita and her colleagues at Brookhaven have discovered an important intermediate step. A most intriguing result is the involvement of two energetic metal complexes to activate one CO2 molecule. Without CO2, the complexes dimerize much more slowly than expected.

The Brookhaven scientists’ work, incorporating a combined experimental and theoretical approach, may help to explain why the reaction proceeds so slowly, which may ultimately contribute to the design of more efficient catalysts.

Fujita will present a talk on this work, which will be published in the Oct. 1 Journal of the American Chemical Society, during the "Organometallic Catalysis" session on Tuesday, September 9, 2003, at 2:30 p.m. in the Jacob Javits Convention Center, room 1A29. This work was funded by the Division of Chemical Sciences, Office of Basic Energy Sciences at DOE’s Office of Science.

Karen McNulty Walsh | EurekAlert!
Further information:
http://www.bnl.gov/

More articles from Life Sciences:

nachricht New eDNA technology used to quickly assess coral reefs
18.04.2019 | University of Hawaii at Manoa

nachricht New automated biological-sample analysis systems to accelerate disease detection
18.04.2019 | Polytechnique Montréal

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Explosion on Jupiter-sized star 10 times more powerful than ever seen on our sun

A stellar flare 10 times more powerful than anything seen on our sun has burst from an ultracool star almost the same size as Jupiter

  • Coolest and smallest star to produce a superflare found
  • Star is a tenth of the radius of our Sun
  • Researchers led by University of Warwick could only see...

Im Focus: Quantum simulation more stable than expected

A localization phenomenon boosts the accuracy of solving quantum many-body problems with quantum computers which are otherwise challenging for conventional computers. This brings such digital quantum simulation within reach on quantum devices available today.

Quantum computers promise to solve certain computational problems exponentially faster than any classical machine. “A particularly promising application is the...

Im Focus: Largest, fastest array of microscopic 'traffic cops' for optical communications

The technology could revolutionize how information travels through data centers and artificial intelligence networks

Engineers at the University of California, Berkeley have built a new photonic switch that can control the direction of light passing through optical fibers...

Im Focus: A long-distance relationship in femtoseconds

Physicists observe how electron-hole pairs drift apart at ultrafast speed, but still remain strongly bound.

Modern electronics relies on ultrafast charge motion on ever shorter length scales. Physicists from Regensburg and Gothenburg have now succeeded in resolving a...

Im Focus: Researchers 3D print metamaterials with novel optical properties

Engineers create novel optical devices, including a moth eye-inspired omnidirectional microwave antenna

A team of engineers at Tufts University has developed a series of 3D printed metamaterials with unique microwave or optical properties that go beyond what is...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

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

17.04.2019 | Event News

First dust conference in the Central Asian part of the earth’s dust belt

15.04.2019 | Event News

Fraunhofer FHR at the IEEE Radar Conference 2019 in Boston, USA

09.04.2019 | Event News

 
Latest News

New automated biological-sample analysis systems to accelerate disease detection

18.04.2019 | Life Sciences

Explosion on Jupiter-sized star 10 times more powerful than ever seen on our sun

18.04.2019 | Physics and Astronomy

New eDNA technology used to quickly assess coral reefs

18.04.2019 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>