Catalytic hydrolysis of ammonia borane via cobalt palladium nanoparticles.

Abstract

Monodisperse 8 nm CoPd nanoparticles (NPs) with controlled compositions were synthesized by the reduction of cobalt acetylacetonate and palladium bromide in the presence of oleylamine and trioctylphosphine. These NPs were active catalysts for hydrogen generation from the hydrolysis of ammonia borane (AB), and their activities were composition dependent. Among the 8 nm CoPd catalysts tested for the hydrolysis of AB, the Co(35)Pd(65) NPs exhibited the highest catalytic activity and durability. Their hydrolysis completion time and activation energy were 5.5 min and 27.5 kJ mol(-1), respectively, which were comparable to the best Pt-based catalyst reported. The catalytic performance of the CoPd/C could be further enhanced by a preannealing treatment at 300 °C under air for 15 h with the hydrolysis completion time reduced to 3.5 min. This high catalytic performance of Co(35)Pd(65) NP catalyst makes it an exciting alternative in pursuit of practical implementation of AB as a hydrogen storage material for fuel cell applications.

• Authors: Daohua Sun, Vismadeb Mazumder, Önder Metin, Shouheng Sun
• Journal: ACS nano (ACS Nano) Vol. 5 Issue 8 Pg. 6458-64 (Aug 23 2011) ISSN: 1936-086X [Electronic] United States
• PMID: 21766875 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2011 American Chemical Society

Chemical References

• Alloys
• Boranes
• Water
• Cobalt
• Palladium
• Hydrogen

Topics

• Alloys (chemistry)
• Boranes (chemistry)
• Catalysis
• Cobalt (chemistry)
• Hydrogen (chemistry)
• Hydrolysis
• Metal Nanoparticles (chemistry)
• Palladium (chemistry)
• Particle Size
• Temperature
• Time Factors
• Water (chemistry)