Platinum on carbonaceous supports for glycerol hydrogenolysis: Support effect

Werner Oberhauser (1) , Claudio Evangelisti (2) , Ravindra P. Jumde (2) , Rinaldo Psaro (2) , Francesco Vizza (1) , Manuela Bevilacqua (1) , Jonathan Filippi (1) , Bruno F Machado (3) , Philippe Serp (3)

1 ICCOM - Istituto di Chimica dei Composti Organometallici
2 CNR-Instituto di Science e tecnologie Moleculari
3 LCC - Laboratoire de chimie de coordination

Metal vapor synthesis (MVS) technique was applied to generate Pt-nanoparticles of different size (<1.3 nm and 2.5 nm) deposited onto carbonaceous supports, mainly characterized by a different surface area. The supported catalysts were employed in the glycerol hydrogenolysis reaction carried out under basic reaction conditions at 433 and 453 K to obtain 1,2-propanediol as the main liquid product. Comparison of the composition of the liquid- and gas-phase products obtained by the different catalysts showed a clear dependence of aqueous-phase reforming, water-gas shift reaction activity as well as 1,2-propanediol chemoselectivity on the degree of Pt-sintering occurring on different carbon supports. High-resolution transmission electron microscopic and X-ray powder diffraction studies carried out on as-synthesized and recovered heterogeneous catalysts provided clear evidences that a high surface area carbon support, such as Ketjen Black EC-600JD, notably retards nanoparticle aggregation.

Domaines: Chimie de coordination

Werner Oberhauser, Claudio Evangelisti, Ravindra P. Jumde, Rinaldo Psaro, Francesco Vizza, et al.. Platinum on carbonaceous supports for glycerol hydrogenolysis: Support effect. Journal of Catalysis, 2015, 325, pp.111-117. ⟨10.1016/j.jcat.2015.03.003⟩. ⟨hal-01913096⟩