Complex Pt/Al2O3 materials for small catalytic systems

[摘要] 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. (C) 2007 Elsevier B.V. All rights reserved.

[发布日期] 2007-09-25

[效力级别]  Proceedings Paper

[关键词] chemical vapour infiltration;alumina;platinum;nanoparticles;catalysis;carbon monoxide