Chengguo Yan , Jiaguang Zheng , Ao Xia , Qingbo Zhang , Meiling Lv , Zhenxuan Ma , Chao Su , Zhendong Yao
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引用次数: 0
摘要
在传统的储氢材料中,LiBH 因其相对较大的氢容量而被视为最佳的氢传输材料之一。然而,由于锂氢氧化物的脱氢温度极高,其稳定的热力学特性并不适合用于储氢。在此,我们提出了一种新型的 LiBH 方法,即使用固态多羟基甘露醇作为反应物,在 69.9 °C 以下调节氢气释放。在 140 ℃ 时,枸杞多糖-甘露醇复合材料能以超快的速度释放出超过 7 wt% 的氢。XRD、傅立叶变换红外光谱和扫描电镜测试表明,甘露醇(H)和枸杞多糖(LiBH)反应产生氢气的同时,原位产生了大量热量,进一步促进了枸杞多糖的分解制氢,超过了 H- H 反应的理论脱氢量。这项工作为开发基于复杂氢化物的快速、简便的大容量制氢系统提供了可能性。
Low-temperature hydrogen release exceeding 7 wt% from LiBH4-mannitol composites
Among conventional hydrogen storage materials, LiBH4 has been regarded as one of the best hydrogen transporters due to its relatively large hydrogen capacities. However, because of its extraordinarily high dehydrogenation temperatures, LiBH4 was not suitable for hydrogen storage due to its stable thermodynamic features. Herein, we present a novel approach to LiBH4 that uses solid-state multi-hydroxyl mannitol as a reactant, regulating hydrogen release below 69.9 °C. More than 7 wt% H2 could be released with ultra-fast rates at 140 °C from the LiBH4-mannitol composite. XRD, FTIR, and SEM tests revealed that the reaction between mannitol (Hδ+) and LiBH4 (Hδ−) to produce hydrogen was accompanied by the generation of large amounts of heat in situ, which further promoted the decomposition of LiBH4 for hydrogen production, exceeding the theoretical dehydrogenation amount of Hδ+- Hδ− reaction. This work indicates possibilities for the development of fast and easy high-capacity hydrogen generation systems based on complex hydrides.
期刊介绍:
The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc.
The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.