Modification of NaAlH4 properties using catalysts for solid-state hydrogen storage: A review. (1st January 2021)

• Record Type: Journal Article
• Authors: Ali, N.A.; Ismail, M.
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 1(2021)
• Page Start: 766
• Page End: 782
• Publication Date: 2021-01-01
• Subjects: Hydrogen storage -- Solid-state storage -- NaAlH4 -- Catalysts; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.10.011
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Energy is an essential requirement in our daily lives. Currently, most of our energy demands are fulfilled by fossil fuels. After 20 years, non-renewable fossil fuels are estimated to plummet rapidly. The world will face energy shortage and will seek for a new environmental method of energy generation for transportation, economy and application. Hydrogen is a fascinating energy carrier that is considered as 'hydrogen economy' for the future. The key challenge in developing the hydrogen economy is the context of hydrogen storage. Storing hydrogen via the solid-state method has received special attention and consideration because of its safety and larger storage capacity. A light complex hydride, NaAlH4, is considered as an attractive material for solid-state hydrogen storage owing to its high hydrogen capacity, bulk in availability and low cost. Sluggish sorption kinetics and poor reversibility have driven research into various catalysts to enhance its hydrogen storage properties. This review article examines the development of different catalysts and their effects on the hydrogen storage properties of NaAlH4 . The addition of catalyst offers synergistic catalytic effect on the dehydrogenation performance of NaAlH4 . Doping NaAlH4 with catalyst promote promising results such as lower decomposition temperature, improved kinetics and reduced activation energy. Superior performance on the dehydrogenation performance of NaAlH4 doping with the catalyst may be due to the nanosized catalyst particle and in situ formed active species that may serve as nucleation sites at the surface of the NaAlH4 matrix and benefiting the kinetics properties of NaAlH4 . Highlights: Current progress in NaAlH4 modified through catalysis is reviewed. Roles of catalysis in modification of NaAlH4 properties is highlighted. Future perspective and challenge of emerging research for NaAlH4 are discussed.