Dihydrogen Phosphate Stabilized Ruthenium(0) Nanoparticles: Efficient Nanocatalyst for The Hydrolysis of Ammonia-Borane at Room Temperature


DURAP F., Caliskan S., ÖZKAR S. , Karakas K., Zahmakıran M.

MATERIALS, vol.8, no.7, pp.4226-4238, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 8 Issue: 7
  • Publication Date: 2015
  • Doi Number: 10.3390/ma8074226
  • Title of Journal : MATERIALS
  • Page Numbers: pp.4226-4238
  • Keywords: hydrogenphosphate, ammonia-borane, hydrolysis, catalyst, ruthenium nanoparticles, HYDROGEN GENERATION SYSTEM, HIGHLY-ACTIVE CATALYSTS, PALLADIUM(0) NANOCLUSTERS, REUSABLE CATALYST, FACILE SYNTHESIS, DEHYDROGENATION, STORAGE, DISSOCIATION, SOLVOLYSIS, CLUSTERS

Abstract

Intensive efforts have been devoted to the development of new materials for safe and efficient hydrogen storage. Among them, ammonia-borane appears to be a promising candidate due to its high gravimetric hydrogen storage capacity. Ammonia-borane can release hydrogen on hydrolysis in aqueous solution under mild conditions in the presence of a suitable catalyst. Herein, we report the synthesis of ruthenium(0) nanoparticles stabilized by dihydrogenphosphate anions with an average particle size of 2.9 +/- 0.9 nm acting as a water-dispersible nanocatalyst in the hydrolysis of ammonia-borane. They provide an initial turnover frequency (TOF) value of 80 min(-1) in hydrogen generation from the hydrolysis of ammonia-borane at room temperature. Moreover, the high stability of these ruthenium(0) nanoparticles makes them long-lived and reusable nanocatalysts for the hydrolysis of ammonia-borane. They provide 56,800 total turnovers and retain similar to 80% of their initial activity even at the fifth catalytic run in the hydrolysis of ammonia-borane at room temperature.