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 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 8 Issue: 7
  • Publication Date: 2015
  • Doi Number: 10.3390/ma8074226
  • Journal Name: MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • 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
  • Middle East Technical University Affiliated: Yes

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.