The structure of the title compound, NaK(5)Ni(5)(P(2)O(7))(4), is characterized by the presence of two crystallographically independent P(2)O(7) groups with different conformations. The conformation of the first P(2)O(7) group is eclipsed, whereas that of the second is staggered. All atoms are in general positions except for two nickel and one potassium ions which lie on symmetry centers. Moreo...

For decades Ni has been known as an electrocatalyst for the oxygen evolution reaction (OER), however, crucial role that Fe plays in enhancing electrocatalytic activity of still requires deeper investigation and understanding. In this work, we shed some light on by studying structural different Ni-based electrocatalysts upon electrolytic addition quantities Fe. Colloidal NiO, well Ni, NiO NiNiO ...

In the solvated title complex, [Ni(C(46)H(47)N(6)O(2))]ClO(4)·2CH(4)O, the coordination sphere around the Ni(II) ion can be described as distorted cis-NiO(2)N(4) octa-hedral defined by two phenolate O atoms and four N atoms from the hexa-dentate ligand. An intra-molecular bifurcated N-H⋯(N,O) hydrogen bond helps to establish the conformation of the complex mol-ecule. In the crystal, the compone...

A cation-excess (Ni,Mn) ferrite N~o.~zMno.51Fe2.0504.0 with a single phase was synthesized by heating the mixture of corresponding metal salts and oxide in 5% 02175% C02120% N2 gas mixture for 18h at 1100C. It could be thermochemically activated to form a cation-excess ferrite Nio,5z~l+s~Mno.51~l+6~Fe2~05~1+6~0440 in N2 gas at elevated temperature: The ( value was 0.03 1 at 1100C. The activated...

A sonochemistry-based synthesis method was used to produce nanocrystalline nickel oxide powder with ≈ 20 nm average crystallite diameter from Ni(OH)(2) precursor. Ultrasound waves were applied to the primary solution to intensify the Ni(OH)(2) precipitation. Dried precipitates were calcined at 320°C to form nanocrystalline NiO particles. The morphology of the produced powder was characterized b...

The title compound, [Ni(2)(C(12)H(12)N(2)O(4)S(3))(H(2)O)(4)]·2C(3)H(7)NO·3H(2)O, is made up of a centrosymmetric, bimetallic complex containing a 24-membered macrocyclic ring, two dimethyl-formamide and three water solvent mol-ecules. The Ni atom adopts a slightly distorted NiO(6) octahedral geometry arising from two O,O-bidentate ligands and two water molecules. There are inter-molecular O-H⋯...

Abstract Syngas can be produced from biomethane via Partial Oxidation of Methane (POM), being an attractive route since it is ecofriendly and sustainable. In this work, catalysts Ni supported on MgO–ZrO 2 solid solutions, prepared by a one-step polymerization method, were characterized HRTEM/EDX, XRD, XPS, H -TPR, in situ XRD. All catalysts, including Ni/ZrO Ni/MgO as reference, tested for POM ...

In the title compound, [Ni(2)(C(16)H(18)FN(3)O(3))(2)(H(2)O)(4)](OH)(NO(3)), the cationic [Ni(2)(C(16)H(18)FN(3)O(3))(2)(H(2)O)(4)](2+) building units are linked through Ni-O(carboxyl-ate) and Ni-N(amino) bridges into a layer structure. The two independent nickel atoms lie on inversion centres: one adopts an NiO(6) octa-hedral geometry, the other a trans-NiN(2)O(4) octahedral arrangement. The c...

We present measurements at 10.6 microm that demonstrate electronic tuning of the polarization response of asymmetric-spiral infrared antennas connected to Ni-NiO-Ni diodes. Continuous variation of the bias voltage applied to the diode results in a rotation of the principal axis of the polarization ellipse of the spiral antenna. A 90 degrees tuning range is measured for a bias voltage that varie...

The chemical reduction progression behaviour of transition metals (Mo, Zr, W, Ce, and Co) doped on NiO was studied using temperature programmed (TPR) analysis. A wet impregnation method applied to synthesise the series catalysts. progress catalysts attained by a reductant gas at concentration 40% v/v CO/N2. X-ray diffraction (XRD) employed determine composition reduced phases. Undoped 384℃ obta...