Hydrogen storage properties of surface oxidized LiBH4 system catalyzed with NiO nanorods and nanoplates

• Published in: International journal of hydrogen energy Vol. 50; pp. 812 - 826
• Main Authors: Kaliyaperumal, Ajaijawahar, Periyasamy, Gokuladeepan, Annamalai, Karthigeyan
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 02.01.2024
• Subjects: Dehydrogenation; Hydrogen storage; Hydrogenation; LiB[OH]4; LiBH4; NiO; LiB[OH]4; Hydrogen storage; Dehydrogenation; NiO; Hydrogenation; LiBH4
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2023.08.141

This paper highlights the hydrogen storage performance of surface oxidized LiBH4 (Lithium borohydride) system incorporated with NiO nanostructures under 250 °C. Surface oxidized LiBH4 system was impregnated with hydrothermally synthesized mesoporous NiO nanorods (NiONR) and NiO nanoplates (NiONP) using simple ultrasonication method. Hydrogen sorption and desorption studies has been investigated for LiBH4/NiONR and LiBH4/NiONP systems for the first time. The Brunauer-Emmett-Teller results showed that the specific surface area of NiONR, NiONP, LiBH4/NiONR and LiBH4/NiONP systems were 77.92, 88.12, 96.67 and 101.65 m2/g, respectively. Hydrogenation followed by isothermal dehydrogenation at 250 °C revealed that the LiBH4/NiONR and LiBH4/NiONP systems released ∼3.44 wt% and 4.02 wt% of hydrogen respectively in 60 min. Using the Kissinger's relation, the activation energy (Ea) was calculated as 69.28 and 63.23 kJ/mol for LiBH4/NiONR and LiBH4/NiONP systems, respectively. The dehydrogenation rate of LiBH4/NiONP system was found to be greater than that of LiBH4/NiONR system due to its large surface area and lower activation energy. The reported results revealed that nickel oxide nanostructures incorporated surface oxidized LiBH4 systems provide new opportunities for the solid-state hydrogen storage applications. [Display omitted] •Hydrogen sorption/desorption studies were investigated for the LiBH4/NiO systems.•The surface area of LiBH4/NiONR and LiBH4/NiONP are 96.7 and 101.6 m2/g respectively.•LiBH4/NiONP and LiBH4/NiONR desorb 4.0 and 3.4 wt% of hydrogen at 250 °C in 1 h.