Synthesis of Ni₃N/SiO₂ nanocomposites and investigation of their intrinsic static and dynamic magnetic properties

Abstract

Ni 3 N/SiO 2 nanocomposites were prepared via nitriding of a Ni/SiO 2 nanocomposite precursor in flowing ammonia. The intrinsic static and dynamic magnetic properties of the as-prepared samples were investigated with a superconducting quantum interference device and an Agilent N5230A network analyzer, respectively. According to our results, it was found that pure phase nanocrystalline Ni 3 N could be obtained after the Ni/SiO 2 nanocomposite precursor was calcined under a flow of NH 3 at 300 C, and the as-obtained nanocrystalline Ni 3 N is non-ferromagnetic under a static magnetic field and nonmagnetic under a dynamic electromagnetic field.

Comprehensive Evaluation of Transition Metal Doped Ni3N to Construct High-Efficiency Hydrogen Evolution Catalyst

“…4h, the increased valence band maximum indicates that ΔG of electrocatalysts after transition metal doping becomes smaller, thus bene ting for the desorption of intermediate and hydrogen. 30 Similarly, the experimental results perfectly con rms our DFT calculation.…”

“…20- After a ne comparison of the diffraction peaks of XRD patterns, it can be well indexed to (002) planes of hexagonal Ni 3 N. Moreover, according to the latest research, when the nitriding temperature is higher than 350°C, part of the Ni 3 N on the catalyst surface is decomposed, which also causes the disappearance of some peaks. [29][30][31] Supplementary Table 6 exhibits the details of crystal structures of phases in samples. In Supplementary Fig.…”

Interfacing nickel nitride and nickel boosts both electrocatalytic hydrogen evolution and oxidation reactions

“…1 ). Further increasing the nitridation temperature led to the disappearance of the Ni 3 N phase, most likely due to the low thermal stability of Ni 3 N at high temperature (>350 °C) 37 , 38 . The nitridation duration was also varied at 300 °C (Supplementary Fig.…”

“…10-0280) appeared while the major composition of Ni 3 Ni/Ni/NF remained as the cubic Ni phase (JCPDS card No. 04-0850) 38 . The high-resolution transmission electron microscopy (HRTEM) image of the Ni 3 N/Ni interfacial electrocatalyst clearly shows the interface between hexagonal Ni 3 N and cubic Ni (Fig.…”

Gold Nanocluster‐Decorated Nickel Nitride as Stable Electrocatalyst for Oxygen Evolution Reaction in Alkaline Media

“…Its metallic nature makes it very relevant for catalytic applications. Nevertheless, the stacking/agglomeration of the Ni 3 N nanomaterial coupled with formation of metallic Ni‐phase at high temperature, often causes (i) smaller specific surface areas, (ii) poor electrical conductivity, (iii) low active site exposure yield, and (iv) rapid corrosion of active sites in alkaline solutions . Hence surface tailoring with organic framework (OF) and/or foreign metal nitrides (e. g. Fe 3 N) has received considerable attention as a way forward to achieve desirable catalytic properties of Ni 3 N nanomaterials.…”