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

Abstract

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.

Tuning the Surface Composition of Ni/meso‐CeO2 with Iridium as an Efficient Catalyst for Hydrogen Generation from Hydrous Hydrazine

“…In the past decade, significant progresses has been made in developing active and selective catalysts for promoting H 2 generation from N 2 H 4 ⋅ H 2 O. It was found that alloying Ni with noble metals, such as Pt, Ir, Rh, or Pd, resulted in remarkable improvement to the catalytic activity and H 2 selectivity . In particular, immobilized Ni−Pt or Ni−Ir alloy nanoparticles on alkaline metal oxides (e.g., CeO 2 , La 2 O 3 ) enabled the complete decomposition of N 2 H 4 ⋅ H 2 O at mild temperatures with 100 % H 2 selectivity .…”

Pd–Ni nanoparticles supported on reduced graphene oxides as catalysts for hydrogen generation from hydrazine

“…The existence of Ni and Pd metals in an alloy state is a key factor behind the observed high catalytic performance. 46 The monometallic Pd/rGO and Ni/rGO nanocatalysts show poor catalytic activity for the hydrogen generation from hydrazine, while the presence of both metals with inter-metallic Ni-Pd bonding on the catalyst active centres is vital for the activation of bonds in hydrazine for hydrogen generation. The rGO supports are also important, because they prevent the aggregation of Pd 3 Ni NPs during the dehydrogenation.…”

Production of Liquid Solar Fuels and Their Use in Fuel Cells

“…284 The catalytic activity of hydrogen evolution from hydrous hydrazine was further improved by using well-dispersed rhodium-nickel nanoparticles grown on graphene. 285 Noble-metal-modified Ni catalysts, in particular Rh-Ni, 285,287,288 Pt-Ni, [289][290][291][292][293][294][295][296][297] and Ir-Ni, [298][299][300] Ni-Pd 301 were most efficient for the selective decomposition of hydrous hydrazine due to the prominent alloy synergy effect. Noble-metal-free NiFeMo nanoparticles (Ni 0.6 Fe 0.4 Mo NPs) without any surfactant or support have been facilely synthesized and applied as an efficient catalyst for the rapid and complete decomposition of hydrous hydrazine to hydrogen and nitrogen (Equation 40) at a mild temperature.…”