Complex Pt/Al2O3 materials for small catalytic systems

SURFACE & COATINGS TECHNOLOGY

卷:201

Article; Proceedings Paper

Christoglou, Christos ; Alphonse, Pierre ; Armand, Claude ; Desnoyer, Christophe ; Vahlas, Constantin

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

DOI  :  10.1016/j.surfcoat.2007.04.101

来源: Elsevier

【 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.

【 授权许可】

Free