Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7722755 | International Journal of Hydrogen Energy | 2013 | 6 Pages |
Abstract
Direct use of solid sodium borohydride (NaBH4) to react with minimized amount of water provides a straightforward means for increasing the hydrogen density of the system. But meanwhile, the resulting solid-liquid reaction system always suffers from serious kinetic problem. Our study found that the cobalt-molybdenum-boron (Co-Mo-B) catalyst prepared using an ethylene glycol solution of cobalt chloride is highly effective for promoting the hydrolysis reaction of solid NaBH4. Particularly, a combined usage of small amounts of Co-Mo-B catalyst, aluminum powder and sodium hydroxide enables a rapid and high-yield hydrogen generation from the hydrolysis reaction of solid NaBH4. A systematic study has been conducted to investigate the property dependence of the system on the components. In addition, the by-products of reaction were analyzed using powder X-ray diffraction and thermogravimetry/differential scanning calorimetry/mass spectroscopy techniques. Our study demonstrates that the multi-component system with an optimized composition can fulfill over 95% fuel conversion, yielding 6.43Â wt% hydrogen within 3Â min. The favorable combination of high hydrogen density, fast hydrogen generation kinetics and high fuel conversion makes the newly developed solid NaBH4-based system promising for portable hydrogen source applications.
Related Topics
Physical Sciences and Engineering
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Authors
Da-Wei Zhuang, Jing-Jing Zhang, Hong-Bin Dai, Ping Wang,