Poly(N-vinyl-2-pyrrolidone)-stabilized palladium-platinum nanoparticles-catalyzed hydrolysis of ammonia borane for hydrogen generation


Rakap M.

JOURNAL OF POWER SOURCES, vol.276, pp.320-327, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 276
  • Publication Date: 2015
  • Doi Number: 10.1016/j.jpowsour.2014.11.146
  • Title of Journal : JOURNAL OF POWER SOURCES
  • Page Numbers: pp.320-327
  • Keywords: Palladium, Platinum, Nanoparticle, Ammonia borane, Hydrogen, REUSABLE CATALYST, NANOCLUSTERS CATALYST, SODIUM-BOROHYDRIDE, RUTHENIUM NANOPARTICLES, STABILIZED RUTHENIUM(0), COBALT(0) NANOCLUSTERS, ROOM-TEMPERATURE, DEHYDROGENATION, EFFICIENT, STORAGE

Abstract

The catalytic use of highly efficient poly(N-vinyl-2-pyrrolidone)-stabilized palladium platinum nanoparticles (4.2 +/- 1.9 nm) in the hydrolysis of ammonia-borane is reported. The catalyst is prepared by co-reduction of two metal ions in ethanol/water mixture by an alcohol reduction method and characterized by transmission electron microscopy,.X-ray photoelectron spectroscopy and UV-Vis spectroscopy. They are recyclable and highly active for hydrogen generation from the hydrolysis of ammonia-borane even at very low concentrations and temperature, providing a record numbers of average turnover frequency value (125 mol H-2/mol cat.min(-1)) and maximum hydrogen generation rate (3468 L H-2 min(-1) (mol cat)(-1)). They also provide activation energy of 51.7 +/- 2 kJ/mol for the hydrolysis of ammonia borane. (C) 2014 Elsevier B.V. All rights reserved.