Surface characterization of ReOx-Pd/TiO2 catalyst : Influence of support and protocols of Pd and Re deposition
Résumé
The most frequently used active and selective catalysts for the catalytic hydrogenation reaction of succinic acid to 1,4 butanediol comprise a noble metal in combination with a promoter metal such as Re, Sn, Mn. Among the best catalysts proposed for this reaction, bimetallic Re-Pd catalysts supported on TiO2 are very promising [1].
In this presentation we report on the characterization by X-ray photoelectron spectroscopy of a larger set of monometallic Pd, Re and bimetallic ReOx-Pd/TiO2. The aim of this study was to get a better understanding of the nature of the active and selective sites implied in the aqueous-phase reaction. Transmission electron microscopy, in HAADF-STEM mode, was also performed to localize Pd and Re particles.