Effect of Co-B on the hydrogen storage properties of LiAlH4

• Published in: Chemical physics letters 2025-01, Vol.859, p.141764, Article 141764
• Main Authors: Li, Xue, Zheng, Xueping, Ma, Qiuhua, Xu, Bo, Wang, Yarong, Li, Yuankui
• Format: Article
• Language: English
• Subjects: Chemical reduction synthesis; Co-B; Hydrogen storage property; LiAlH4
• ISSN: 0009-2614
• DOI: 10.1016/j.cplett.2024.141764

[Display omitted] •Co-B was prepared through a simple chemical reduction method.•The dehydrogenation performance of LiAlH4 doped with 5 wt% Co-B was improved.•The new formed active substance AlCo plays an essential role in catalyzing LiAlH4. In this work, the effect of Co-B on the dehydrogenation properties of LiAlH4 was investigated. The results show that, the amount of hydrogen released from LiAlH4 doped with 5 wt% Co-B was 7.7 wt% at 200 °C, which increased by 6.9 % compared to pure LiAlH4, and the initial dehydrogenation temperature was reduced by 30 °C. In addition, it can release 5.0 wt% H2 at 120 °C, which is 5 times the original dehydrogenation. Meanwhile, the scanning electron microscope and X-ray diffractometer showed that the addition of Co-B formed a new active substance AlCo, which could improve the dehydrogenation performance of LiAlH4.