Complex Pt/Al2O3 materials for small catalytic systems

Christos Christoglou (1) , Pierre Alphonse (1) , Claude Armand (2) , Christophe Desnoyer (3) , Constantin Vahlas (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 Département de Physique
3 SOLEA SAS

This paper reports on the preparation of catalytic materials composed of a porous metallic preform containing winding microchannels whose surface is coated by a complex catalytic film. Al2O3 is deposited inside the pores by means of wet impregnation in a first step, in order to increase the surface and to serve as an intermediate layer on which Pt nanoparticles are deposited in a second step. The latter deposition takes place by means of forced metalorganic chemical vapour infiltration (F-MOCVI). Pt(acac)2, is used in appropriate low pressure operating conditions, to allow for a process with low thermal budget, compatible with the geometrical and physical characteristics of the porous substrate. The results are evaluated by means of BET, SIMS, SEM/EDX and FEG/SEM. The catalytic material is finally being tested following the oxidation of carbon monoxide, a model reaction with high industrial interest.

Mots clés: Chemical vapour infiltration; Alumina; Platinum; Nanoparticles; Catalysis; Carbon monoxide

Domaines: Matériaux

Christos Christoglou, Pierre Alphonse, Claude Armand, Christophe Desnoyer, Constantin Vahlas. Complex Pt/Al2O3 materials for small catalytic systems. Surface and Coatings Technology, 2007, vol. 201, pp. 9195-9199. ⟨10.1016/j.surfcoat.2007.04.101⟩. ⟨hal-00808904⟩