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Electrocatalysis and Catalysis

Electrocatalysis is a catalytic chemical reaction in which electrons are produced as a product. Work in all of our projects is directed by and contributes to advances in electrocatalysis. SOFC's and solid-state sensors require fuels to be modified for their systems. This can happen using a separate reformer or internally. Ideally, an external reformer would not be necessary but due to the carbon and sulfur in many fuels causes coking (build up of carbon in fuel lines) and fouling. Advances in electrocatalysis help minimize these problems without pre-processing of fuels.

Our lab has advanced the understanding electrocatalytic CH4 conversion and the post- combustion reduction of NOx. We recently showed that the Mixed Potential Theory is insufficient for metal oxide semi conducting electrodes such as LaFeO3 and LaMnO3. We developed a more comprehensive mechanism called the Differential Electrode Equilibria that considers adsorption behavior in addition to the response from electrochemical reactions.


“Photocatalytic Water Disinfection on Oxide Semiconductors: Part 1-Basic Concepts of TiO2 Photocatalysis,” T. Bak, J. Nowotny, N. J. Sucher and E. D. Wachsman, Advances in Applied Ceramics, 111, 4-15 (2012).

“A Kinetic Study of Catalytic Activity Degradation of La0.6Sr0.4Co0.2Fe0.8O3-d,” D. Oh, J. Yoo, D. Gostovic, K. S. Jones, and E.D. Wachsman, ECS Transactions, 16-51, 97 (2009).

“Identifying Drivers of Catalytic Activity through Systematic Surface Modification of Cathode Materials,” E.D. Wachsman and C. Kan, ECS Transactions, 16-51, 33 (2009).

“Identifying Drivers of Catalytic Activity through Systematic Surface Modification of Cathode Materials,” C. C. Kan and E. D. Wachsman, Journal of the Electrochemical Society, 156, B695-702 (2009).

“Influence of Adsorption and Catalytic Reaction on Sensing Properties of a Potentiometric La2CuO4/YSZ/Pt Sensor,” J. Yoo, S. Chatterjee, F. M. Van Assche, and E. D. Wachsman, Journal of the Electrochemical Society, 154, J190 (2007).

"Electrocatalytic Reduction of NOx on La1-xAxB1-yB'yO3-δ; Evidence of Electrically Enhanced Activity," E. D. Wachsman, P. Jayaweera, G. Krishnan, and A. Sanjurjo, Solid State Ionics, 136-137, 775-82 (2000).

"Electrocatalytic Reduction and Selective Absorption of NOx," E. D. Wachsman, P. Jayaweera, G. N. Krishnan, and A. Sanjurjo, Society of Automotive Engineers Technical Paper No. 982513, 1-6 (1998).

"Oxide-Ion Conducting Ceramics: Defect Chemistry and Applications," E. D. Wachsman, in Progress in Ceramic Basic Science: Challenge Toward the 21st Century, T. Hirai, S. Hirano, and Y. Takeda, eds., The Basic Science Division of The Ceramic Society of Japan, 129-143 (1996).

"Effect of Ru-Loading on the Catalytic Activity of Ru-NaZSM-5 Zeolites for Nitrous Oxide Decomposition," Y. F. Chang, J. G. McCarty, and E. D. Wachsman, Applied Catalysis B, 6, 21-23 (1995).

"Isotopic Study of NO Decomposition over Cu- or Co-Exchanged ZSM-5 Zeolite Catalysts," Y. F. Chang, J. G. McCarty, E. D. Wachsman and V. L. K. Wong, in Proceedings of the 1995 Diesel Engine Emissions Reduction Workshop, U.S. Department of Energy, 25-38 (1995).

"Catalytic Decomposition of Nitrous Oxide Over Ru-Exchanged Zeolites," Y. F. Chang, J. G. McCarty, E. D. Wachsman, and V. L. Wong, Applied Catalysis B, 4, 283-299 (1994).

"Development of Higher Yield Processes for the Direct Oxidative Catalytic Conversion of Natural Gas," J. G. McCarty, E. D. Wachsman, V. Wong, and C. H. Becker, Proceedings of the International Gas Research Conference, (1992).

"Rates of Electrocatalytic Reactions Employing a Stabilized-Bi2O3 Electrolyte Operating at Moderate Temperatures," E. D. Wachsman, N. Jiang, and D. M. Mason, in Proceedings of the 1988 Fuel Cell Seminar, Long Beach, CA, 65-68 (1988).

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