An infrared study of the oxidation of carbon monoxide over supported rhodium catalysts |
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| Institution: | 1. Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland;2. Department of Inorganic Chemistry, University of Alicante, Ap.99, E-03080 Alicante, Spain;1. Politecnico di Milano, Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Via La Masa, 34, 20156, Milano, Italy;2. Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, 14000, Caen, France;3. Institute of Energy Technologies and Centre for Research in Nanoengineering, Universitat Politècnica de Catalunya, Barcelona, Spain;1. Earth and Environmental Engineering, Columbia University in the City of New York, 500 W 120th St, 10027, New York, NY, United States;2. Chemical Engineering, Columbia University in the City of New York, 500 W 120th St, 10027, New York, NY, United States;1. School of Chemical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea;2. School of Environmental Engineering, University of Seoul, Seoul 02504, Republic of Korea;3. Hydrogen Energy Laboratory, Korea Institute of Energy Research, Daejeon 31136, Republic of Korea;1. Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, SE-412 96 Göteborg, Sweden;2. Volvo Technology AB, 412 58 Gothenburg, Sweden |
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| Abstract: | The reaction of carbon monoxide and oxygen over supported rhodium films has been studied using infrared spectroscopy. The focus of the work was the reactivity of the various CO/Rh/X (X = Al2O3, SiO2, TiO2) surface states for supported catalysts having high and low Rh loading. Under the reaction conditions the “linear CO” species was the most stable toward oxidation, but this could have been a result of an oxidized Rh surface. A new CO/Rh surface species has been proposed which exhibits an infrared band at 2000 cm−1 for a 0.5% Rh/TiO2 film. This species is believed to be a bridged carbonyl between Rh1+ and the TiO2 support. |
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