首页|Hydrogen release of NaBH4 below 60℃ with binary eutectic mixture of xylitol and erythritol additive
Hydrogen release of NaBH4 below 60℃ with binary eutectic mixture of xylitol and erythritol additive
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NaBH4 was widely regarded as a low-cost hydrogen storage material due to its high-mass hydrogen capacity of approximately 10.8％ (mass) and high volumetric hydrogen capacity of around 115 g·L-1. However,it exhibits strong stability and requires temperatures above 500 ℃ for hydrogen release in practical applications. In this study,two polyhydric alcohols,xylitol and erythritol (XE),were prepared as a binary eutectic sugar alcohol through a grinding-melting method. This binary eutectic sugar alcohol was used as a proton-hydrogen carrier to destabilize NaBH4. The 19NaBH4-16XE composite material prepared by ball milling could start releasing hydrogen at 57.5 ℃,and the total hydrogen release can reach over 88.8％ (4.45％ (mass)) of the theoretical capacity. When the 19NaBH4-16XE composite was pressed into solid blocks,the volumetric hydrogen capacity of the block-shaped composite could reach 67.2 g·L-1. By controlling the temperature,the hydrogen desorption capacity of the NaBH4-XE composite material was controllable,which has great potential for achieving solid-state hydrogen production from NaBH4.
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