Zn doped CeO2 supporting Ni–Pt catalysts toward robust hydrogen generation from hydrous hydrazine.

Ni-based bimetallic catalysts with noble metals exhibit high activity and selectivity for hydrogen generation from hydrazine monohydrate. However, their poor service durability remains a critical challenge. This study investigated the use of Zn-doped CeO 2 as a support for Ni–Pt catalysts to improve their long-term stability. A series of Ni–Pt/Zn-doped-CeO 2 catalysts were prepared via a simple co-precipitation and reduction method. Compared to the pristine Ni 50 Pt 50 /CeO 2 catalyst, the Zn doping can improve the stability of CeO 2 support in the alkaline condition, and the X-ray photoelectron spectroscopy (XPS) analysis clearly indicates that Zn doping leads to a negative shift in the binding energy of connected Ni and thus enhances the stability of the electronic structure in the catalysts. The findings in this work suggest that Zn-modified CeO 2 supporting Ni–Pt catalyst offer a promising approach to achieving a better balance between activity and durability for hydrogen generation catalysts. • Ni–Pt/Zn-doped CeO 2 catalysts was prepared via a simple co-precipitation method. • The Ni 50 Pt 47.5 /Zn 2.5 catalyst exhibits excellent performance: ■ 100% H 2 selectivity ■ TOF of 2000 h−1 at 323 K in 2.5 M NaOH ■ Satisfactory stability after 10 cycles (TOF of 1800 h−1) • Ni–Pt/Zn-doped CeO 2 catalysts leverages the high activity and selectivity of Ni-Pt alloys for hydrazine decomposition while incorporating Zn to tune the CeO 2 support, and replacing Pt with Zn to reduce costs. [ABSTRACT FROM AUTHOR]