Process design of ultrasonic spray pyrolysis synthesis of RuO2/TiO2 nanoparticles for catalytic applications

• Applicants: Professor Dr.-Ing. Bernd Friedrich; Privatdozent Dr. Michael Schroeder
• Subject Area: Mechanical Process Engineering
• Term: from 2009 to 2013
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 123154985

• Final Report Year: 2012

Final Report Abstract

Ruthenium oxide (RuO2) is a promising catalyst material for various industrially important chemical reactions. It is well known that RuO2, if deposited on a TiO2 support, can act as an efficient electron transfer catalyst. The most important aim in this study was to produce the RuO2/TiO2 core-shell nanoparticles with improved catalytic properties and a long-time stability using the ultrasonic spray pyrolysis (USP) method in a single step process. The obtained particles were characterized by several methods. The results of the direct synthesis have not confirmed the formation of RuO2/TiO2 core/shell nanoparticles. In order to form the desired core-shell morphology of the RuO2/TiO2 new equipment for multistep USP-synthesis was developed. The ideally core-shell structure was reached using this new approach. The additional investigations with the aim of optimizing both structure and process shall be performed. Our multistep USP synthesis offers a potential for the design and the development of various complex systems for different applications.

Publications

• Direct synthesis of RuO2/TiO2 nanoparticles with core-and-shell structure for potential catalytic application, Proc. SPRAY 2010, 9. Workshop über Sprays, Techniken der Fluidzerstäubung und Untersuchung von Sprühvorgängen, Fritsching, U. and Gutheil, E. (E
  Stopic, S., Schroeder, M., Zaunbrecher, R., Morscheiser, J., Friedrich, B.
  
• Process Design of ultrasonic spray pyrolysis synthesis of Ru/TiO2 nanoparticles, ILASS-Europe 2010, 23rd Annual Conference on Liquid Atomization and Spray Systems, Brno, Czech Republic, 191-192
  Stopic, S., Schroeder, M., Hellmann, A., Friedrich, B.
  
• Controlled droplet size distribution in ultrasonic spray pyrolysis, Metall, 10, 455-459
  Bogovic, J., Schwinger, A., Stopic, S., Schroeder, J., Gaukel, V., Schuhmann, H.P., Friedrich, B.
  
• Nanosized metallic oxide produced by ultrasonic spray pyrolysis method, Proceeding of European Metallurgical Conference 2011, Duesseldorf, June 26-June 29, 2011, Volume 3: Resources efficiency in the non-ferrous metals industry-optimization and improvemen
  Bogovic, J., Stopic, S., Friedrich B.
  
• Synthesis and characterization of RuO2/TiO2-Nanoparticles for potential catalytic applications, Workshop Spray 2012, Berlin
  Stopic, S., Friedrich, B., Schroeder, M.