Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 468, Issue 1-2, Pages 493-498Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2008.01.023
Keywords
Hydrogen generation; Borohydride; Hydrolysis; Catalyst; Kinetics; Capacity
Categories
Funding
- Hi-tech Research mid Development Program of China (863) [2006AA05Z120, 2007AA05Z144]
Ask authors/readers for more resources
Hydrolysis of sodium borohydride NaBH(4) is a promising method for on-board hydrogen supply for fuel cells. In this study, the hydrolysis reaction was studied by starting with solid NaBH(4) rather than aqueous borohydride solutions, and adding less amount of water in an attempt to explore the maximum hydrogen generation capacity. It was found that hydrogen could be liberated at very high rates rates and over than 90% conversion rates were achieved when the mole ratio of water to sodium borohydride was not less than 4:1. The final hydrogen generation capacity was achieved as high as 6.7 wt%. Materials such as CoCl(2) or cobalt powder were found to be effective as the catalysts for the hydrolysis reaction at such reaction conditions. A large heat effect due to the exothermic reaction a low melting point of NaBo(2)center dot 4H(2)O led to the acceleration of hydrogen generation at the latter part of the hydrolysis process. It is thus promising to utilize these reaction conditions to achieve high hydrogen generation capacity by proper system design.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available