This paperisd edicated to Dr.D anielDuprez and Dr.Pierre Gallezotw ith whom we have sharedm any discussions about supported (bi)metallic catalysts.Supporting information for this articleisa vailable on the WWW under http://dx.

BIOVERT+BKL:CPIA series of 2 wt % Pd/TiO2 monometallic catalysts were prepared by varying some parameters, such as the nature of the precursor salt, the titania support, and the preparation method. The structural and textural properties of the catalytic systems were fully characterized by several physical and chemical techniques (inductively coupled plasma optical emission spectrometry, N-2 physisorption, H-2 chemisorption, transmission.electron microscopy coupled with energy dispersive X-ray spectroscopy, powder X-ray diffraction, temperature programmed reduction, X-ray photoelectron spectroscopy, and gas phase reaction of cyclohexane dehydrogenation). The catalytic performances were further estimated for the hydrogenation of an aqueous solution of succinic acid (SUC) performed in a batch reactor at 160 degrees C and under 150 bar total pressure. The results showed that all the Pd catalysts are very Selective to produce gamma-butyrolactone, the first hydrogenated product. However, the rate of succinic acid conversion is a function of both the Pd dispersion and the preparation method. The deposition-precipitation method allows one to obtain the highest performing 2 wt % Pd/TiO2 samples during SUC hydrogenation in terms of activity and stability