E. Rios

TL;DR: The bulk structural properties of the nickel cobaltite, NiCo2O4, prepared by the thermal decomposition of carbonates, sol-gel methods, and the decomposition of hydroxides, have been examined by X-ray powder diffraction (XRD) and Xray absorption spectroscopy (EXAFS and XANES) as discussed by the authors.

TL;DR: In this paper, the properties of the compound NiCo2O4 with spinel-related structure have been examined by means of magnetic measurements, neutron diffraction, X-ray absorption near edge structure (XANES) and extended Xray absorption fine structure (EXAFS), and the results suggest a delocalised electron distribution on the octahedral sites with average oxidation states of +3.5 and +2.5 for nickel and cobalt, respectively, and lead to a cation distribution for NiCo 2O4 of {Ni3+0.

TL;DR: In this article, the relationship between solid state chemistry, surface properties and electrocatalytical reactivities towards the reaction of oxygen is investigated on powder electrodes of cobalt and manganese spinel type oxides MnxCo3−xO4 (0≤x≤1).

TL;DR: In this article, the binding energies of the photoelectron peaks observed for the transition metal ions and the oxygenated ions were recorded, indicating that cobalt is present in both divalent and trivalent states.

TL;DR: In this article, the relationship between the cation distributions in bulk and on the surface and the electrocatalytical reactivity towards the oxygen reduction reaction (orr) on thin film electrodes of cobalt and manganese spinel type oxides was studied.