Advanced H2-storage system fabricated through chemical layer deposition in a well-designed porous carbon scaffold

Abstract

A new and effective in situ impregnation/deposition technique of chemical layer deposition (CLD) on a gas–solid interface is developed for fast and controllable film deposition and functional nanostructure design. Using CLD, a series of nanostructured Al(BH₄)₃(NH₃)₆@porous carbon composites are successfully produced, and a significant improvement of the hydrogen storage properties of Al(BH₄)₃(NH₃)₆ is achieved with tunable dehydrogenation temperature ranging from 114 to 175 °C, enhanced dehydrogenation kinetics with a low activation energy of 65.6 KJ mol⁻¹ compared to 105.5 KJ mol⁻¹ for the bulk counterpart, and a significantly increased H₂ purity from 67.4% to 93.5%.