Navigation Links
Tufts University Prof. Maria Flytzani-Stephanopoulos named as AAAS Fellow
Date:12/18/2008

MEDFORD/SOMERVILLE, Mass. Maria Flytzani-Stephanopoulos of Tufts University's School of Engineering has been selected as an AAAS Fellow for distinguished contributions to the field of catalysis, particularly for new insights in oxidation reactions on nanoscale metal oxides in fuel conversion and pollutant processes.

Election as Fellow is an honor bestowed upon AAS members by their peers. Flytzani-Stephanopoulos, professor in the Department of Chemical and Environmental Engineering, was one of 486 members named as a Fellow.

Flytzani-Stephanopoulos's research group has been active in designing catalysts with a reduced amount of precious metals used to generate high-grade hydrogen for fuel cells. The water-gas shift reaction, in which carbon monoxide is removed from the fuel cell by reacting with water to produce carbon dioxide and hydrogen, is a key step in fuel processing hydrogen. Catalysts, such as metal oxides prepared with precious metals like platinum, are used to lower the reaction temperature and increase the production of hydrogen.

The Tufts group was first to demonstrate that catalysts prepared with atomic-level dispersions of gold or platinum in oxide supports, such as cerium oxide or iron oxide, show the highest activity for the water-gas shift reaction. Adding more metal to form nanoparticles on the support oxide does not improve the activity; it simply wastes the precious metal. Highly active and stable catalysts are required for integration in fuel cell systems. To improve the stability of the precious metal with temperature and length of operating time, the Tufts group was first to show that adding small amounts of gaseous oxygen could have the desired structural effect of keeping gold fully dispersed and available to react.

Professor Stephanopoulos and her research group are presently investigating ways to further improve the activity of doped metal oxides by identifying which oxide structure binds gold stronger. The researchers synthesize single crystal oxides at the nanoscale with specific shapes (rods, cubes, polyhedra) and crystal faces; dope these with various metals and study them as catalysts for alcohol steam reforming, the water-gas shift reaction, hydrocarbon oxidation and other reactions, including sulfur removal reactions. The aim is to benefit fuel processing overall at all scalesfrom providing power to a laptop or cell phone to increasing energy from a power plantand for any fuel gas stream, including coal-derived gas.

"There are always new things to discover in materials science which impact catalysis," said Flytzani-Stephanopoulos. "With new methods for the synthesis of nanomaterials rich in defects, and with proper doping of these structures with a variety of metals, it's like starting from scratch again to understand their chemistry and tailor their catalytic properties to optimize both their activity and selectivity for a large number of reactions of interest to clean and sustainable energy production."

This year 486 members were selected as Fellows because of their scientifically or socially distinguished efforts to advance science or its applications. This year's AAAS Fellows will be announced in the AAAS News & Notes section of the journal Science on 19 December 2008. New Fellows will be honored during the 2009 AAAS Annual Meeting in Chicago on February 14.


'/>"/>

Contact: Alex Reid
Alexander.reid@tufts.edu
617-627-4173
Tufts University
Source:Eurekalert

Related biology news :

1. Tufts University biologists link Huntingtons disease to health benefits in young
2. Tufts to develop morphing chemical robots
3. A study by the MUHC and McGill University opens a new door to understanding cancer
4. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
5. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
6. Bioengineers at University of Pennsylvania devise nanoscale system to measure cellular forces
7. Binghamton University researchers investigate evolving malaria resistance
8. Antioxidant to retard wrinkles discovered by Hebrew University researcher
9. Society for General Microbiology 161st Meeting, University of Edinburgh
10. Boston University biomedical engineers find chink in bacterias armor
11. KAUST and American University in Cairo to collaborate on research and academic development
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/19/2016)... The new GEZE SecuLogic access ... "all-in-one" system solution for all door components. It can ... door interface with integration authorization management system, and thus ... minimal dimensions of the access control and the optimum ... offer considerable freedom of design with regard to the ...
(Date:4/13/2016)... 2016  IMPOWER physicians supporting Medicaid patients in ... clinical standard in telehealth thanks to a new partnership ... platform, IMPOWER patients can routinely track key health measurements, ... index, and, when they opt in, share them with ... a local retail location at no cost. By leveraging ...
(Date:3/23/2016)... 2016 Einzigartige ... und Stimmerkennung mit Passwörtern     ... MESG ), ein führender Anbieter digitaler Kommunikationsdienste, ... SpeechPro zusammenarbeitet, um erstmals dessen Biometrietechnologie einzusetzen. ... Möglichkeit angeboten, im Rahmen mobiler Apps neben ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... June 24, 2016  Regular discussions on a range of ... between the two entities said Poloz. Speaking at ... Ottawa , he pointed to the country,s inflation target, ... government. "In certain ... institutions have common economic goals, why not sit down and ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... announce the launch of their brand, UP4™ Probiotics, into Target stores nationwide. The ... is proud to add Target to its list of well-respected retailers. This list ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... and Mold) microbial test has received AOAC Research Institute approval 061601. , “This ... introduced last year,” stated Bob Salter, Vice President of Regulatory and Industrial Affairs. ...
(Date:6/23/2016)... ... June 23, 2016 , ... STACS DNA Inc., the ... at the Arkansas State Crime Laboratory, has joined STACS DNA as a Field Application ... team,” said Jocelyn Tremblay, President and COO of STACS DNA. “In further expanding our ...
Breaking Biology Technology: