Ammonia borane as an efficient direct fuel in alkaline fuel cells: mechanism, catalysts, applications, and challenges

Abstract

Ammonia borane (NH3BH3, AB) has attracted attention as carbon-free energy owing to its non-toxicity, excellent stability, and high solubility in water under ambient conditions. Unlike the traditional application as a...

Recent progress in porous catalysts for dehydrogenation of ammonia borane

“…For the former method, Xu et al 85 prepared Ru NPs supported on XC-72 carbon via an adsorption-low temperature pyrolysis method. Specifically, the Ru 3 (CO) 12 precursor was first adsorbed in the porous carbon and then annealed at 300 1C to obtain the optimal Ru/C-300. It is found that this strategy facilitated the uniform confinement of Activated carbon.…”

“…[6][7][8] Among the chemical hydrogen storage materials, ammonia borane-NH 3 BH 3 -(AB) has attracted intense attention due to its high hydrogen density (19.6 wt%), low molecular weight (30.7 g mol À1 ), long-term stability, high solubility in water and methanol, lack of toxicity and controllable hydrogen production. [9][10][11][12] With a white color appearance, AB is a solid crystal at room temperature with a density of 0.74 g cm À3 and a melting point of 112-114 1C. 13 The presence of the three protic N-H and three hydridic B-H hydrogens in AB leads to intra and intermolecular interactions, facilitating the release of H 2 .…”

Investigation of electrocatalytic activity of palladium nanoparticle for ammonia borane oxidation via single‐entity electrochemistry

“…[7][8][9][10] However, when AB is employed for hydrogen generation, the generation process may result in undesirable byproducts, leading to resource wastage. 11 Therefore, the direct electrooxidation of AB stands out as a more attractive option for applications in fuel cells. The electrochemical mechanism underlying the direct electrooxidation of AB in alkaline conditions is as follows 12,13 :…”

“…AB holds potential utility in fuel cells as a hydrogen‐generation material or as a substrate for direct electrooxidation 7–10 . However, when AB is employed for hydrogen generation, the generation process may result in undesirable byproducts, leading to resource wastage 11 . Therefore, the direct electrooxidation of AB stands out as a more attractive option for applications in fuel cells.…”