The focus of our research is the synthesis, characterization and potential applications of new solid state materials. In particular, we have a robust and growing focus on inventing materials to enable fuel cell technology, as well as a continuing program in the chemistry of solid state nitrides and in thermoelectric materials.
As part of the activities of Cornell Fuel Cell Institute (CFCI), we are developing synthetic methods to prepare small nanoparticles (typically 3 to 5 nm in diameter) of more active and more durable electrocatalysts for both the anodes and cathodes in fuel cells. We are also exploring the use of new materials to replace the carbon based catalyst supports used in those electrodes, since the carbon materials oxidize away to CO2 under some operating conditions. This research is aimed at making a significant impact on energy use by increasing the efficiency of conversion of the free energy of fuels to electricity from 25 % (for automotive) or 35 % (for power plants) to the 85 or 90 % that is in principle possible with fuel cells. If we are successful, the results of our research will have world wide impact and help address energy and global climate concerns.
Binary nitride compounds, such as TiN, AlN, GaN and Si3N4, are used as wear resistant coatings, ceramics, laser diodes, moisture barriers, electrical insulation, etc. In spite of the usefulness of such binaries, ternary and quaternary nitride phases are relatively unexplored. We are filling that gap and developing the novel synthetic chemistry necessary to prepare these phases. Our research shows that nitrides are often structurally and chemically unique and quite different from compounds based on anions of neighboring elements, such as oxygen or phosphorous.
We have also had a longstanding interest in semiconductor materials that are potentially efficient thermoelectric cooling devices or thermoelectric power generators. In order to increase the efficiency of these devices, materials that have low thermal conductivity, but high thermopower and electrical conductivity are needed. This is a combination of properties that is very challenging to achieve in real materials, since the optimization of one property alone usually has a negative impact on the others.
Further information about the research can be found on our group WEB page.
Our research is primarily supported by DOE and NSF, as well as NY State and a number of Industrial Partners in CFCI.
Last update: June 2009 | 
