Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Helping a Greenhouse Gas Turn Over a New Leaf

03.02.2014
Catalyst converts CO2 to CO with 92% efficiency

Illustration courtesy of Feng Jiao/University of Delaware

The University of Delaware's nano-porous silver electrocatalyst has an extremely large and highly curved internal surface, which is approximately 150 times larger and 20 times intrinsically more active than the polycrystalline silver commonly used in converting carbon dioxide to useful chemicals.

A team of researchers at the University of Delaware has developed a highly selective catalyst capable of electrochemically converting carbon dioxide — a greenhouse gas — to carbon monoxide with 92 percent efficiency. The carbon monoxide then can be used to develop useful chemicals.

The researchers recently reported their findings in Nature Communications.

“Converting carbon dioxide to useful chemicals in a selective and efficient way remains a major challenge in renewable and sustainable energy research,” according to Feng Jiao, assistant professor of chemical and biomolecular engineering and the project’s lead researcher.

Co-authors on the paper include Qi Lu, a postdoctoral fellow, and Jonathan Rosen, a graduate student, working with Jiao.

The researchers found that when they used a nano-porous silver electrocatalyst, it was 3,000 times more active than polycrystalline silver, a catalyst commonly used in converting carbon dioxide to useful chemicals.

Silver is considered a promising material for a carbon dioxide reduction catalyst because of it offers high selectivity — approximately 81 percent — and because it costs much less than other precious metal catalysts. Additionally, because it is inorganic, silver remains more stable under harsh catalytic environments.

The exceptionally high activity, Jiao said, is likely due to the UD-developed electrocatalyst’s extremely large and highly curved internal surface, which is approximately 150 times larger and 20 times intrinsically more active than polycrystalline silver.

Jiao explained that the active sites on the curved internal surface required a much smaller than expected voltage to overcome the activation energy barrier needed drive the reaction.

The resulting carbon monoxide, he continued, can be used as an industry feedstock for producing synthetic fuels, while reducing industrial carbon dioxide emissions by as much as 40 percent.

To validate whether their findings were unique, the researchers compared the UD-developed nano-porous silver catalyst with other potential carbon dioxide electrocatalysts including polycrystalline silver and other silver nanostructures such as nanoparticles and nanowires.

Testing under identical conditions confirmed the non-porous silver catalyst’s significant advantages over other silver catalysts in water environments.

Reducing greenhouse carbon dioxide emissions from fossil fuel use is considered critical for human society. Over the last 20 years, electrocatalytic carbon dioxide reduction has attracted attention because of the ability to use electricity from renewable energy sources such as wind, solar and wave.

Ideally, Jiao said, one would like to convert carbon dioxide produced in power plants, refineries and petrochemical plants to fuels or other chemicals through renewable energy use.

A 2007 Intergovernmental Panel on Climate Change report stated that 19 percent of greenhouse gas emissions resulted from industry in 2004, according to the Environmental Protection Agency’s website.

“Selective conversion of carbon dioxide to carbon monoxide is a promising route for clean energy but it is a technically difficult process to accomplish,” said Jiao. “We’re hopeful that the catalyst we’ve developed can pave the way toward future advances in this area.”

The research team’s work is supported through funding from the American Chemical Society Petroleum Research Fund and University of Delaware Research Foundation. Jiao has patented the novel application technique in collaboration with UD’s Office of Economic Innovation and Partnerships.

About the professor

Feng Jiao joined UD in 2010. In addition to his faculty role in chemical and biomolecular engineering, he is also affiliated with the Center for Catalytic Science and Technology.

His research interests include developing clean, sustainable and environmental friendly energy supplies by combining catalysis, materials science and electrochemistry to address current energy conversion and storage challenges.

Jiao’s previous work includes developing novel cathode materials to boost the energy storage of lithium-ion batteries, which are used in items ranging from laptops to electric cars, through a new synthetic method, ionothermal synthesis, for preparing lithium manganese phosphates with 3D nanoporous structures.

Andrea Boyle Tippett | Newswise
Further information:
http://www.udel.edu

More articles from Power and Electrical Engineering:

nachricht Stanford team achieves 'holy grail' of battery design: A stable lithium anode
28.07.2014 | Stanford School of Engineering

nachricht Siemens builds the first European onshore power supply for cruise ships
22.07.2014 | Siemens AG

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Anzeige

Anzeige

Event News

Counting down to FEBS-EMBO 2014 in Paris, France

29.07.2014 | Event News

9th European Wood-Based Panel Symposium 2014 – meeting point for the wood-based material branch

24.07.2014 | Event News

“Lens on Life” - Artists and Scientists Explore Cell Divison

08.07.2014 | Event News

 
Latest News

Scientists discover genetic switch that can prevent peripheral vascular disease in mice

29.07.2014 | Life Sciences

From Finding Nemo to minerals – what riches lie in the deep sea?

29.07.2014 | Earth Sciences

Physicists unlock nature of high-temperature superconductivity

29.07.2014 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>