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Research Article Open Access

Characterization of Rh-Ge/TiO2 and Pt-Ge/TiO2 Catalysts by Fourier Transform Infrared Spectroscopy of Adsorbed CO


The Rh-Ge/TiO2 and Pt-Ge/TiO2 bimetallic catalysts are prepared and characterized by Fourier transform infrared (FT-IR) spectroscopy of adsorbed CO. The catalytic reduction procedure induces modifications of the intensity of the bands, indicating thus some changes on the surface of the Rh metallic phase. FTIR investigation of adsorbed CO reveals that the intensity of each peak associated to the different CO absorbed species falls when the germanium content of the catalyst increases. These different modifications show the existence of an interaction between the germanium and rhodium on the bimetallic Rh-GeTiO2 catalysts, and germanium and the platinum on the bimetallic Pt-Ge/TiO2 catalysts.

Ekou T, Ekou L, Lafaye G, Especel C and Marécot P

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