Catalytic coatings on stainless steel prepared by sol–gel route

• Published in: Thin solid films Vol. 495; no. 1; pp. 257 - 261
• Main Authors: Truyen, Dimitri, Courty, Matthieu, Alphonse, Pierre, Ansart, Florence
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 20.01.2006; Elsevier Science; Elsevier
• Subjects: Alumina; Catalytic film; Chemical Sciences; Chemistry; Cross-disciplinary physics: materials science; rheology; Electrochemistry; Electrodes: preparations and properties; Exact sciences and technology; General and physical chemistry; Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids); Material chemistry; Materials science; Methods of deposition of films and coatings; film growth and epitaxy; Physics; Sol–gel; Thixotropy; Thixotropy; Catalytic film; Sol–gel; Alumina; Inorganic compounds; Specific surface area; Precursor; Thermal stability; Nanoparticles; Platinum; Crystal growth from solutions; Catalysis; Sol-gel process; Aluminium oxides; Sol-gel; Experimental study; Adhesion; Coated material; Thickness; Hydrolysis; Rhodium; Transition elements; Homogeneity; Nickel; Nanostructured materials; Peptization
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2005.08.200

Stainless steel (flat and microstructured) substrates have been coated with sol–gel catalysts made up of metal nanoparticles (Rh, Ni, Pt) dispersed on alumina and alumina–ceria supports. The aluminum monohydroxyde (boehmite) sols were synthesized by hot hydrolysis/peptization of an aluminum alkoxide (Yoldas method). It is shown that the rheological properties of the sol, especially the thixotropy, play a key role on the homogeneity and the quality of the film deposited on the metal substrate. The catalyst layers have a very good adhesion, a thickness which can be easily controlled (in the range 0.1 to 10 μm), a large specific surface area and a good mechanical and thermal stability.