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

This paper highlights the hydrogen storage performance of surface oxidized LiBH4 (Lithium borohydride) system incorporated with NiO nanostructures under 250 degrees 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 m(2)/g, respectively. Hydrogenation followed by isothermal dehydrogenation at 250 degrees C revealed that the LiBH4/NiONR and LiBH4/NiONP systems released similar to 3.44 wt% and 4.02 wt% of hydrogen respectively in 60 min. Using the Kissinger's relation, the activation energy (E-a) 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.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved