NiPt Nanoparticles Anchored onto Hierarchical Nanoporous N-Doped Carbon as an Efficient Catalyst for Hydrogen Generation from Hydrazine Monohydrate

Abstract

Catalytic decomposition of the hydrogen-rich hydrazine monohydrate (N2H4·H2O) represents a promising hydrogen storage/production technology. A rational design of advanced N2H4·H2O decomposition catalysts requires an overall consideration of intrinsic activity, number, and accessibility of active sites. We herein report the synthesis of a hierarchically nanostructured NiPt/N-doped carbon catalyst using a three-step method that can simultaneously address these issues. The chelation of metal precursors with polydopamine and thermolysis of the resulting complexes under reductive atmosphere resulted in a concurrent formation of N-doped carbon substrate and catalytically active NiPt alloy nanoparticles. Thanks to the usage of a silica nanosphere template and dopamine precursor, the N-doped carbon substrate possesses a hierarchical macroporous-mesoporous architecture. This, together with the uniform dispersion of tiny NiPt nanoparticles on the carbon substrate, offers opportunity for creating abundant and accessible active sites. Benefiting from these favorable attributes, the NiPt/N-doped carbon catalyst enables a complete and rapid hydrogen production from alkaline N2H4·H2O solution with a rate of 1602 h–1 at 50 °C, which outperforms most existing catalysts for N2H4·H2O decomposition.

Pt-Ni Nanoalloys for H2 Generation from Hydrous Hydrazine

“…Because of these favorable properties, the Ni-Pt/N-doped carbon catalyst can completely and rapidly produce hydrogen in basic N2H4•H2O solution at 50 °C at a rate of 1602 h −1 , which is superior to existing N2H4•H2O decomposition catalysts. In this paper [100], a layered nanostructure Ni-Pt/N-doped carbon peroxide is synthesized without three steps, which can solve these problems simultaneously (Scheme 5). N-doped carbon substrate and catalytic active Ni-Pt nanoparticles were formed by the chelation of metal precursors with dopamine and the thermal decomposition of the complexes in reducing atmosphere.…”

Metal nanoparticles supported on crystalline Al( OH ) 3 Nano sheets for efficient catalytic hydrogen production from hydrous hydrazine in aqueous solution

“…Table 5 summarized the comparison of catalytic activities of different catalysts for the hydrous hydrazine dehydrogenation. 7,13,20,30,32,33,60‐83 The comparison results indicated that the prepared catalysts used in this research showed a good catalytic performance for hydrogen production.…”

Strategic Advances in Spatiotemporal Control of Bioinspired Phenolic Chemistries in Materials Science

“…To sum, PDA can not only template classic assembling of metallic structures, but it might as well provide a useful platform for the immobilization of single-atom catalysts, alloy metal compounds, and biologically active metal ions. [257,258]…”