Hydrogen Production via Hydrazine Decomposition on Model Platinum–Nickel Nanocatalyst with a Single (111) Facet

Model octahedral Pt–Ni/C nanocatalyst with different particle composition (0.5 ≤ Pt/Ni ≤ 4) was prepared and researched in hydrazine decomposition for hydrogen generation. The experiments discovered dependency of the catalyst activity, selectivity, durability, and stability on both the particle composition and morphology, with the octahedral PtNi/C being found to be the most active and 100% selective, with superior durability and stability. Mechanistic studies and discussions on the reaction mechanism and kinetics were conducted by collecting the kinetic data and deriving the rate law. The finding suggests both the synergistic effect between Pt and Ni active sites and the morphology-originated geometric effect, which play crucial roles in determining the catalyst property.