Cobalt-supported alumina as catalytic film prepared by electrophoretic deposition for hydrogen release applications

• Published in: Applied surface science Vol. 256; no. 24; pp. 7684 - 7691
• Main Authors: Chamoun, R., Demirci, U.B., Cornu, D., Zaatar, Y., Khoury, A., Khoury, R., Miele, P.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2010; Elsevier
• Subjects: Aluminum oxide; Borohydrides; Catalysis; Catalysts; Chemical Sciences; Chemistry; Cobalt; Cobalt-supported on alumina; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Deposition; Electrophoretic deposition; Exact sciences and technology; General and physical chemistry; General, apparatus; Hydrogen storage; Hydrolysis; Physics; Sodium; Sodium borohydride; Structure and morphology; thickness; Surface and interface chemistry; Surface physical chemistry; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thin film structure and morphology; Cobalt-supported on alumina; Hydrogen storage; Sodium borohydride; Electrophoretic deposition; Aluminium oxide; Scanning electron microscopy; Hydrogen; Cobalt; Supported catalyst; Surface structure; Thin films; Hydrolysis; Transmission electron microscopy; Sodium; Electrophoresis
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2010.06.032

Shaped catalysts are crucial for technological applications. In this context, we have developed Co–αAl 2O 3 catalyst films deposited over Cu plates to be used in hydrogen generation by hydrolysis of sodium borohydride NaBH 4 in alkaline solution. The Co–αAl 2O 3 films were prepared by electrophoretic deposition according to six different routes. While five of them failed in fabricating adhering films, the sixth route, consisting of electrodepositing Co-impregnated αAl 2O 3, showed promising results. The as-obtained shaped catalysts were stable when hydrogen vigorously bubbled and catalyzed the NaBH 4 hydrolysis with attractive hydrogen generation rates. These results open an alternative route for preparing shaped catalysts in this reaction.