Catalytic decomposition of hydrous hydrazine over NiPt/La2O3 catalyst: A high-performance hydrogen storage system

Hydrous hydrazine (N 2 H 4 ⋅H 2 O) has attracted considerable interest as a potential hydrogen carrier for vehicular or portable applications. But currently, most of published experimental works focus on dilute N 2 H 4 ⋅H 2 O solution with a limited hydrogen capacity to 2 wt%, which is well below the practical requirements. Herein, we report the catalytic decomposition of concentrated N 2 H 4 ⋅H 2 O solution over a La 2 O 3 -supported Ni Pt alloy catalyst . The Ni Pt/La 2 O 3 catalyst prepared by a one-pot co-precipitation method shows exceptionally high catalytic activity and 100% selectivity towards hydrogen generation from N 2 H 4 ⋅H 2 O at ambient temperatures. In particular, our study has demonstrated, for the first time, that the system composed of concentrated N 2 H 4 ⋅H 2 O solution, high-performance Ni Pt/La 2 O 3 catalyst and appropriate amount of alkali promoter can yield a material-based hydrogen capacity of 6 wt%. This finding is of clear significance for promoting the practical application of N 2 H 4 ⋅H 2 O as a viable hydrogen carrier.