Abstract
The regeneration of sodium borohydride (NaBH4) is crucial to form a closed cycle after it either supplies hydrogen energy via a hydrolysis process or provides energy through electron transfer at the anode of direct borohydride fuel cells (DBFCs).
Highlights
Fuel cells provide a promising alternative technology for electrical power generation from renewable energy carriers, for instance, hydrogen energy.[1]
A high-efficiency and low-cost approach for a simple regeneration process for spent NaBH4 is highly desirable
Without the use of metal hydrides, high-temperature annealing treatment under hydrogen pressure for Mg,[13,17] Mg and Si13 or transition metals (Fe, Co or Ni)[18,19] mixed with dehydrated NaBO2 is another reduction technique. This hightemperature dehydration of NaBO2 is energy consuming and additional hydrogen supply is needed, which increases the costs of the regeneration process
Summary
Fuel cells provide a promising alternative technology for electrical power generation from renewable energy carriers, for instance, hydrogen energy.[1]. Without the use of metal hydrides, high-temperature annealing treatment under hydrogen pressure for Mg,[13,17] Mg and Si13 or transition metals (Fe, Co or Ni)[18,19] mixed with dehydrated NaBO2 is another reduction technique This hightemperature dehydration of NaBO2 is energy consuming and additional hydrogen supply is needed, which increases the costs of the regeneration process (hydrogen from renewable sources, like water splitting, or unsustainably from fossil fuels). This will increase the overall kinetics of the regeneration process In this process, the Mg17Al12 alloy offers a high NaBH4 yield and a low cost, while the hydrated NaBO2 provides a selfsufficient hydrogen source with no need for any additional hydrogen input. This approach for regeneration of NaBH4 may be a very promising solution for future energy supply technologies
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