NiFePd/UiO-66 nanocomposites as highly efficient catalysts to accelerate hydrogen evolution from hydrous hydrazine

Abstract

The exploration of highly efficient catalysts for the hydrolysis of hydrous hydrazine is of great significance for the achievement of future hydrogen economy. In this regard, herein, a catalyst with NiFePd loaded on the metal–organic framework (MOF) UiO-66 was successfully prepared by a simple and safe chemical impregnation method. Due to its high specific surface area, the as-prepared NiFePd/UiO-66 catalyst exhibited efficient catalytic performance for the generation of hydrogen from hydrous hydrazine in an alkaline solution. The results showed that the Ni_0.25Fe_0.25Pd_0.5/UiO-66 catalyst exhibited optimal properties for the decomposition of hydrous hydrazine in an alkaline aqueous solution with a nearly 100% hydrogen selectivity, good activity, and the high total turnover frequency (TOF) value of up to 662.4 h⁻¹ at 80 °C. Moreover, the Ni_0.25Fe_0.25Pd_0.5/UiO-66 catalyst exhibited good durability, which slightly decreased after five cycles of catalytic reaction at 60 °C.