Sodium silicide

Sodium silicide (NaSi, Na4Si4) is a binary inorganic compound consisting of sodium and silicon. It is a solid black or grey crystalline material.[1]

Sodium silicide reacts readily with water yielding gaseous hydrogen and aqueous sodium silicate in an exothermic reaction (~175 kJ·mol−1):[2]

2 NaSi + 5 H2O → 5 H2 + Na2Si2O5

This is used in hydrogen technologies to generate hydrogen as a fuel. And is also used as high energy dense storage for hydrogen under low pressure.[3]

See also

References
  1. Material Safety Data Sheet, SiGNa Chemistry, Inc.
  2. Hydrogen Production from Sodium Silicide Powder; Prospects for On-Board Generation, 14 July 2006
  3. "Silicide-Based Hydrogen Generation for Back-Up Power and Portable Fuel Cells" (PDF). www.signachem.com/. July 2013. Archived from the original (PDF) on 25 Mar 2019. Retrieved 25 Mar 2019.


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