An original electrode design strategy for water splitting was considered. Electrodes covered by CoOx(OH)y/C nanocomposites were in situ fabricated. Assembled CoO(OH)/C∥Co(OH)2/C system reveals excellent long-time stability (more than 50 hours at 10 mA cm−2) with the total overpotential of 0.6 V.

Core(phosphate)–shell(Ni(OH)2–NiOOH) nanoparticles as stable OER electrocatalysts with low overpotentials of 250–290 mV were prepared by chemical and electrochemical conversion of phosphate in an alkaline medium.

Herein, the peculiarities of complex phosphate formation in self-fluxes of Cs-M-Bi-P-O (M = Ca, Sr, Ba and Pb) systems with Cs/P = 0.7-1.3 at fixed ratios of Bi/P = 0.2 and Bi/M = 1.0 were studied and discussed. Three novel isostructural diphosphates with the general composition CsMBi(PO) (M = Ca, Sr and Pb) and the original framework topology were synthesized and characterized via single-crystal and powder X-ray diffraction, SEM, DTA, and FTIR- and UV-VIS-spectroscopy. In addition, electronic structure (DFT) and Voronoi-Dirichlet polyhedra (VDP) characteristics calculations and crystallochemical analysis were performed. In the structure of the new compounds, the MO and BiO polyhedra are connected via common oxygen vertices forming infinite helical-like chains, which are linked by PO groups into a 3D-framework with pentagonal tunnels, where the Cs cations are located. The structural peculiarities are discussed considering perspectives for the creation of new luminescent materials. The dielectric bandgaps, E, of the CsMBi(PO) crystals reveal an ∼0.2 eV low-energy shift in the Ca-Sr-Pb sequence of M cations, which reveals the possibility to tune the optical absorbance spectra of the crystals via the synthesis of solid solutions with various contents of M cations. The glass-ceramic synthetic approach is also proposed as a convenient method for the creation of new diphosphates, and the applicability of this method is verified for CsCaBi(PO).