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


Rakap M. , KALU E. E. , ÖZKAR S.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.36, ss.1448-1455, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 36 Konu: 2
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.ijhydene.2010.10.097
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Sayfa Sayıları: ss.1448-1455

Özet

Herein we report the preparation, characterization and the catalytic use of the polymer-immobilized palladium catalyst supported on TiO2 (Pd-PVB-TiO2) in the hydrolysis of unstirred ammonia-borane solution. The polymer-immobilized palladium catalyst is stable enough to be isolated as solid materials and characterized by XRD, SM, and EDX. The immobilized palladium catalyst supported on TiO2 is found highly active, isolable, and reusable in the hydrolysis of unstirred ammonia-borane 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 = 55.9 kJ/mol) and the effects of catalyst and substrate concentration on the rate for the hydrolysis of unstirred ammonia-borane solution. Maximum H-2 generation rate of similar to 642 mL H-2 min(-1) (g Pd)(-1) and similar to 4367 mL H-2 min(-1) (g Pd)(-1) was measured by the hydrolysis of AB at 25 degrees C and 55 +/- 0.5 degrees C, respectively. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.