Determination of layered nickel hydroxide phases in materials disordered by stacking faults and interstratification

Abstract

The formation of stacking faults and phase interstratification disorder in the layered nickel(II) hydroxides during the chemical precipitation synthesis of the materials using nickel(II) nitrate and potassium hydroxide solutions has...

α/β-Ni(OH)2 phase control by F-ion incorporation to optimise hybrid supercapacitor performance

“…On the other hand, beta phases of nickel hydroxide should not have any interlayer species, but they can form disordered structures and result in sorbed water. 28…”

“…On the other hand, beta phases of nickel hydroxide should not have any interlayer species, but they can form disordered structures and result in sorbed water. 28 Thermogravimetric analysis (TGA) was carried out for each of the nickel hydroxide samples and a commercial nickel hydroxide (Sigma-Aldrich) to determine decomposition processes during the heat treatment. The weight losses of the nickel hydroxide samples are given in Table S6.…”

Synthesis of Green Brucite [NixMg1−x(OH)2] by Incorporation of Nickel Ions in the Periclase Phase (MgO) Applied as Pigments

“…The compounds Ni(Nitr) and Ni(Chlo) demonstrated the same crystallinity of 88%. Moreover, the splitting of peak (001) in the Ni(Ac) and Ni(Chlo) compounds is characteristic of the interstratification disorder of Ni(OH) 2 , by forming layers of α-Ni(OH) 2 and β-Ni(OH) 2 , and the broadening or splitting of the reflective plane is related with the loss of order along the c-axis [47,48].…”

Bimetallic CPM-37(Ni,Fe) metal–organic framework: enhanced porosity, stability and tunable composition

“…This arrangement stimulates the formation of α-Ni(OH) 2 via conversion of the β-Ni(OH) 2 phase. [71][72][73] The layered striated morphology with tightly incorporated iron ions, whose synergistic presence is crucial, 68 might play a role in increased efficiency. On the other hand, there is a formal contradiction, as α-Ni(OH) 2 itself has a higher catalytic activity in OER than β-Ni(OH) 2 (according to the Bode model, 74 the α-Ni(OH) 2 more readily oxidizes to γ-NiO(OH) during the OER reaction, which in turn takes part in the catalytic cycle).…”