Add time:07/20/2019         Source:sciencedirect.com

The application of NaBH4 hydrolysis to hydrogen generation is currently obstructed by its regeneration. Finding a simple and low cost method to regenerate its hydrolysis byproduct is therefore important. Herein, the regeneration of NaBH4 is obtained by reacting its direct hydrolysis byproduct, NaBO2·2H2O, with a mixture of Mg and Mg2Si by ball milling. In this reaction, the reduced agents are only metal and intermetallic compounds, thus hydrogen in the regenerated NaBH4 (Hδ−) derives solely from NaBO2·2H2O (Hδ+). The introduction of Mg2Si increases the NaBH4 regeneration yield to 86%, which is the highest regeneration yield reported for NaBH4 until now. The reaction mechanism was also clarified for the first time.

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