Demonstrates efficient hydrogen release and NaBH4 regeneration in a CO2 conversion process, suggesting a new approach for sustainable energy.
Sodium borohydride (NaBH 4 ) is a promising hydrogen storage material due to its high hydrogen content and facile high‐purity hydrogen release via hydrolysis. This work reports that carbon dioxide (CO 2 ) accelerates the hydrolysis of NaBH 4 and facilitates the regeneration of NaBH 4 via ball milling the hydrolytic products with Mg. CO 2 significantly enhances the hydrogen release by providing protons required during hydrolysis. It also facilitates the formation of borax during hydrolysis which can be used directly as feedstocks to regenerate NaBH 4 with a high yield of over 76%. Compared to widely used metal‐based catalysts, CO 2 ‐assisted hydrolysis offers significant advantages since it eliminates the need for metal catalyst separation from the hydrolytic products, simplifying recovery and enabling more efficient NaBH 4 regeneration. Moreover, CO 2 is converted to CH 4 during the process, achieving both carbon capture and conversion. This multi‐functional approach contributes to the development of a closed‐loop hydrogen storage system, accompanied by an efficient CO 2 conversion to a power fuel.
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Han et al. (2026) studied this question.
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