Polymer-immobilized palladium supported on TiO2 (Pd–PVB–TiO2) as highly active and reusable catalyst for hydrogen generation from the hydrolysis of unstirred ammonia–borane solution

✍ Scribed by Murat Rakap; Egwu Eric Kalu; Saim Özkar

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 703 KB
• Volume: 36
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2010.10.097

✦ Synopsis

Herein we report the preparation, characterization and the catalytic use of the polymerimmobilized palladium catalyst supported on TiO 2 (PdePVBeTiO 2 ) in the hydrolysis of unstirred ammoniaeborane solution. The polymer-immobilized palladium catalyst is stable enough to be isolated as solid materials and characterized by XRD, SEM, and EDX.

The immobilized palladium catalyst supported on TiO 2 is found highly active, isolable, and reusable in the hydrolysis of unstirred ammoniaeborane even at low concentrations and temperature. The work reported here also includes the full experimental details for the collection of a wealth of kinetic data to determine the activation energy (E a ¼ 55.9 kJ/mol) and the effects of catalyst and substrate concentration on the rate for the hydrolysis of unstirred ammoniaeborane solution. Maximum H 2 generation rate of ∼642 mL H 2 min À1 (g Pd) À1 and ∼4367 mL H 2 min À1 (g Pd) À1 was measured by the hydrolysis of AB at 25 C and 55 AE 0.5 C, respectively.