Destabilization of Boron-Based Compounds for Hydrogen Storage in the Solid-State: Recent Advances

Abstract

Boron-based materials have been widely studied for hydrogen storage applications. Examples of these compounds are borohydrides and boranes. However, all of these present some disadvantages that have hindered their potential application as hydrogen storage materials in the solid-state. Thus, different strategies have been developed to improve the dehydrogenation properties of these materials. The purpose of this review is to provide an overview of recent advances (for the period 2015–2021) in the destabilization strategies that have been considered for selected boron-based compounds. With this aim, we selected seven of the most investigated boron-based compounds for hydrogen storage applications: lithium borohydride, sodium borohydride, magnesium borohydride, calcium borohydride, ammonia borane, hydrazine borane and hydrazine bisborane. The destabilization strategies include the use of additives, the chemical modification and the nanosizing of these compounds. These approaches were analyzed for each one of the selected boron-based compounds and these are discussed in the present review.

Calcium Borohydride Ca(BH4)2: Fundamentals, Prediction and Probing for High-Capacity Energy Storage Applications, Organic Synthesis and Catalysis

“…Destabilization of boron-based materials can be achieved by using additives (various compounds based on Mg, B, Al, C, S, Ti, intermetallics, etc. ), chemical modifications, and nanosizing effects [90][91][92][93][94][95][96][97][98]. Various RHCs have been employed, and most showed improved desorption temperatures compared to pristine components; for instance, Mg(BH4)2/Ca(BH4)2, Mg(BH4)2/CaH2, or Mg(BH4)2/CaH2/3NaH (Equations ( 23)-( 25 An extension of the destabilization strategy proposed by Durojaiye in 2010 [92] was employed by Huang et al in 2016, who used Mg(AlH4)2 in order to destabilize Ca(BH4)2 instead of magnesium borohydride [93].…”

Nanosizing Approach—A Case Study on the Thermal Decomposition of Hydrazine Borane

“…However, the use of solvents (H 2 O or alcohol) makes the hydrogen capacity of the system unattractive for application and the exothermic dehydrogenation indicates the regeneration of spent fuel is of thermodynamically unfavorable. Nanosizing is another approach that has been widely used to improve the reaction kinetic of a hydrogen storage material [ 14 ]. In 2005, through quantum-chemical calculations, Wagemans et al [ 15 ] proved that when the crystallite size of MgH 2 is reduced to below 2 nm, thermodynamic improvement is made possible.…”

Photocatalytic dehydrogenation of ammonia borane over Ti3C2/MOF-supported Pd-doped Co nanoparticles

“…3 Among them, a variety of chemical hydrogen storage materials including aminoborane, methylcyclohexane, borane hydrazine, and sodium borohydride have attracted a lot of attention owing to their complete dehydrogenation under mild conditions. 4,5 With a high hydrogen content (19.6 wt%) and great stability, ammonia borane (NH 3 BH 3 , AB) as one of the aminoboranes is regarded as a potential chemical for storing hydrogen. 6 Dehydrogenation from the thermal decomposition of AB is often accomplished at high temperature with enormous energy consumption, but three equivalent hydrogen from AB hydrolysis can be facilely produced at ambient temperature using appropriate metal nanocatalysts.…”