A fuel cell is a kind of power generator which produces electricity by oxidizing hydrogen in oxygen or air. However, hydrogen is not easy to care for due to its being a very flammable and explosive gas.
Inorganic hydrides such as lithium borohydride (1), sodium borohydride (2), potassium borohydride (3), and lithium aluminum hydride (4) are relatively-stable crystals. The researchers have investigated fuel cells using them as hydrogen sources. For example, 2 reacts with water and generates hydrogen according to Scheme 1. But hydrogen generation is inhibited in alkaline aqueous solution, and can be regulated by using proper catalysts. In this case, the electrode reaction is represented by Scheme 2 and is able to extract electricity safely.
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Inorganic Hydrides Used as Hydrogen Sources of Fuel Cell
References
- An ultrasafe hydrogen generator: aqueous, alkaline borohydride solutions and Ru catalyst.
- A Compact borohydride fuel cell.
- A fuel cell development for using borohydrides as the fuel
- A study on hydrogen generation from NaBH4 solution using the high-performance Co-B catalyst
- A comprehensive review of direct borohydride fuel cells
- Accelerating velocity of hydrogen generation from sodium borohydride by citric acid catalyst
