Work

High capacity and efficient dehydrogenation of aluminum hydride: Optimized by highly active TiN nanoparticles with low addition

Year: 2025

Type: article

Abstract: Improving the dehydrogenation behavior of aluminum hydride (AlH3) by introducing additives provides a promising avenue in portable hydrogen source applications. However, the challenge remains in the development of highly active additives that facilitate hydrogen storage in composites while maintaining high capacity with a relatively small amount of additive. This work presents the successful synthesis of TiN nanoparticles by nitriding reaction using TiO2 as the precursor. The onset dehydrogenation temperature of AlH3 could be remarkably reduced to 52.9 °C on account of the catalytic effect of TiN nanoparticles. Furthermore, the composite exhibits a close approximation to the realistic capacity of pure aluminum hydride, with a maximum capacity of 9.9 wt.%. The notable decrease in the apparent dehydrogenation activation energy of AlH3 from 130.86 to 86.69 kJ·mol−1 after the incorporation of TiN substantiates the pivotal role of multivalent titanium and nitrogen.

Source: Nano Research

DOI: 10.26599/nr.2025.94907318