Apr 11, 2012 · Electrochemical cycling of this film transformed it into β-NiOOH, which was observed to be three times more active than γ-NiOOH. The higher activity of β-NiOOH is …

Nov 20, 2020 · In-situ Raman measurements reveal that surface β-Ni(OH) 2 initially present at Ni/NiO nanosheets is preserved during the HER to much lower potentials than at Ni or NiO …

Nov 5, 2022 · We report two-dimensional correlation spectroscopy (2D-COS) analyses of the Raman spectra of NiO nanoparticles over a temperature range from 100 to 300 K. 2D-Raman …

In the paramagnetic phase with the rock-salt structure, no first-order Raman scattering is expected in NiO. However, when NiO is antiferromagnetically ordered or defect-rich, the …

With structural miniaturization down to the nanoscale, some detectable parameters of materials no longer remain constant. For NiO nanoparticles example, Raman shift and Néel temperature …

Dec 1, 2019 · The 1P LO Raman band is shifted upon incorporation of Fe (Fe–NiO/NF), suggesting that Fe is inserted into the lattice of NiO. In addition, the 2 M peak disappears and …

May 4, 2022 · Based on this feature, here we design a highly efficient composite Ni-Y2O3 catalyst, which forms abundant active Ni-NiOx-Y2O3 interfaces under the water-gas shift …

Raman band for the surface nickel oxide did not sharpen and shift to higher fre- quency as previously observed for the sur- face metal oxides (W, MO, V, Re, and Cr) (Z-6). Instead, the …

Mesoporous NiO nanosheets were prepared by a facile sol–gel process using Aerosol-OT, Bis (2-ethyl hexyl) sulfosuccinate sodium salt (AOT) as anionic surfactant. The products were …

Feb 20, 2020 · Nickel oxide (NiO) has a cubic rock salt crystal structure at room temperature. Raman scattering of the transverse optical (TO) and longitudinal optical (LO) phonon in NiO is …