Nickel phosphide is an emerging low-cost, earth-abundant catalyst that can efficiently reduce water to generate hydrogen. However, the synthesis of nickel catalysts usually involves multiple steps and laborious. Herein, a convenient straightforward approach three-dimensional (3D) self-supported biphasic Ni5 P4 -Ni2 P nanosheet (NS) array cathode presented, which obtained by direct phosphorization commercially available foam using phosphorus vapor. The synthesized 3D P-NS exhibits outstanding...

A facile urea-assisted hydrothermal synthesis and systematic characterization of hydroxyapatite (HA) with calcium nitrate tetrahydrate diammonium hydrogen phosphate as precursors are reported. The advantage the proposed technique over previously reported synthetic approaches is simple but precise control HA crystals morphology, which achieved by employing an intensive, stepwise, slow thermal decomposition urea well varying initial concentrations starting reagents. Whereas plate-, hexagonal...

Exceptional magnetic properties of magnetite, Fe3O4, nanoparticles make them one the most intensively studied inorganic nanomaterials for biomedical applications. We report successful gram-scale syntheses, via hydrothermal route or controlled coprecipitation in an automated reactor, colloidal Fe3O4 with sizes 12.9 ± 5.9, 17.9 4.4, and 19.8 3.2 nm. To investigate structure–property relationships as a function synthetic procedure, we used multiple techniques to characterize structure, phase...

The formation process of titania based nanorods during hydrothermal synthesis starting from an amorphous TiO2·nH2O gel has been investigated. Sodium tri-titanate (Na2Ti3O7) particles with a rodlike morphology were prepared by simple in the presence concentrated NaOH aqueous solution. ion exchange reaction synthesized Na2Ti3O7 HCl under ultrasonic treatment promotes complete sodium substitution and H2Ti3O7 nanorods. Low-temperature annealing as-produced leads to loss layered crystal structure...

We report an easy one-step approach for fabricating integrated Ni2P-nanorods/Ni (Ni2P-NRs/Ni) electrodes by direct phosphorization of a commercially available nickel foam current collector under solvothermal conditions. The resulting self-supported Ni2P-NRs/Ni composite electrode exhibits high electrochemical performance towards hydrogen evolution reaction in acidic medium.

The manipulation of electric ordering with applied magnetic fields has been realized on magnetoelectric (ME) materials; however, their ME switching is often accompanied by significant hysteresis and coercivity that represents for some applications a severe weakness. To overcome this obstacle, work focuses the development new type polymer nanocomposites exhibits tailored response at room temperature. multiferroic are based three different ferrite nanoparticles, Zn0.2Mn0.8Fe2O4 (ZMFO), CoFe2O4...

An effective method to boost the electrocatalytic activity of nickel phosphides in H2 evolution reaction is reported. The took advantage density functional theory calculations that allowed design a highly active material based on combination d-metal with p-metal within phosphide structure. Furthermore, principle proven experimentally through successful synthesis self-supported ternary Al–Ni–P foam electrocatalyst by alloying Ni and Al followed gas transport phosphorization reaction. As...

A series of colloidal MxFe3–xO4 (M = Mn, Co, Ni; x 0–1) nanoparticles with diameters ranging from 6.8 to 11.6 nm was synthesized by hydrothermal reaction in aqueous medium at low temperature (200 °C). Energy-dispersive X-ray microanalysis and inductively coupled plasma spectrometry confirm that the actual elemental compositions agree well nominal ones. The structural properties obtained were investigated powder diffraction, Raman spectroscopy, Mössbauer neutron pair distribution function...

Abstract Nickel phosphide is an emerging low‐cost, earth‐abundant catalyst that can efficiently reduce water to generate hydrogen. However, the synthesis of nickel catalysts usually involves multiple steps and laborious. Herein, a convenient straightforward approach three‐dimensional (3D) self‐supported biphasic Ni 5 P 4 ‐Ni 2 nanosheet (NS) array cathode presented, which obtained by direct phosphorization commercially available foam using phosphorus vapor. The synthesized 3D P‐NS exhibits...

An approach to significantly enhance the performance of cost-effective nickel phosphide catalyst for electrochemical water oxidation has been developed via interfacing with Mg oxide-hydroxide. We have synthesized Ni2P nanoparticles anchored on Mg2O(OH)2-like phase supported carbon paper. During oxygen evolution reaction, well-defined serve as precursors immediate formation active and stable nanostructured hydroxide catalyst. As anode reaction in an alkaline electrolyte, electrode shows a...

We report a simple low-cost concept for the preparation of water-oxidation electrocatalyst via modification self-supported Ni5P4–Ni2P foam catalyst precursor with Al. As an anode alkaline oxygen evolution reaction, this material exhibits impressive Tafel slope 27 mV dec–1 and offers anodic current densities 10, 100, 300 mA cm–2 at overpotentials merely 180, 247, 312 mV, respectively. Moreover, demonstrates high operational stability, as reflected by steady-state performance more than 8 days....

Facile synthesis of a recyclable magnetic covalent organic framework for the extraction lipophilic marine biotoxins.

The effect of the crystal structure ordered transition-metal phosphide catalysts on hydrogen-evolution reaction is investigated using single crystals iron-phosphide (FeP) and monoclinic nickel-diphosphide (<italic>m</italic>-NiP₂).

Defect engineering of thermoelectric (TE) materials enables the alteration their crystal lattice by creating an atomic-scale disorder, which can facilitate a synergistic modulation electrical and phonon transport, leading to enhancement TE properties. This work employs compositional nonstoichiometry strategy for manipulation Ni-vacancies Ni-interstitials through Ni-deficient Ni-excess compositions (Zr, Hf)Ni1±xSn-based half-Heusler (HH) alloys realize state-of-the-art figure-of-merit (ZT)...

AlFe₂B₂ pre-catalyst produces a nanocrystalline Fe₃O₄ shell in alkaline media. The system acts as remarkably stable water oxidation electrocatalyst.

In this paper, we explore the drastic differences in transport properties and catalytic activities for two structural polymorphs of NiP2: cubic (Pa3; No. 205) monoclinic NiP2 (C2/c; 15). The former one has been long assumed to be high-pressure metastable phase, as it had originally synthesized through methods. Synthetic situ synchrotron X-ray diffraction studies unambiguously show that polymorph can at ambient pressure but irreversibly transforms into structure above 876 K. Band calculations...

The N−doping of carbon nanotubes (CNTs) is widely accepted as an effective way to enhance the catalytic performance CNT-supported Ni catalysts for CO2 methanation. To demonstrate, in a direct systematic comparison, importance producing high-performance methanation catalysts, we developed two composed 15 wt% on pristine (Ni/CNT) and N−doped CNT (Ni/CNT−N) correlated their with properties. Compared Ni/CNT, Ni/CNT−N achieved higher XCO2 81.2% SCH4 = 99.2% at lower temperature 400 °C, exhibiting...

Iron phosphide (Fe2P) crystallizes in its own hexagonal crystal structure type (h-Fe2P). As found meteorites, orthorhombic polymorph (o-Fe2P) was originally reported as a high-temperature and high-pressure phase. Recently, o-Fe2P described being stable at ambient pressure, yet no synthetic methods were developed for single-crystal growth or single-phase bulk powder synthesis. Here, we report successful method growing single crystals synthesizing phase-pure polycrystalline samples using...