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


Rakap M.

JOURNAL OF POWER SOURCES, cilt.276, ss.320-327, 2015 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 276
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.jpowsour.2014.11.146
  • Dergi Adı: JOURNAL OF POWER SOURCES
  • Sayfa Sayıları: ss.320-327

Özet

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.