Highly active and stable surface structure for oxygen evolution reaction originating from balanced dissolution and strong connectivity in BaIrO solid solutions.

Catalysts for the oxygen evolution reaction (OER) are receiving great interest since OER remains the bottleneck of water electrolyzers for hydrogen production. Especially, OER in acidic solutions is crucial since it produces high current densities and avoids precipitation of carbonates. However, even the acid stable iridates undergo severe dissolution during the OER.

Growth and Characterization of ROBiS High-Entropy Superconducting Single Crystals.

A series of high-entropy superconductors, ROBiS (R = La + Ce + Pr + Nd + Sm), have been successfully grown in the form of single crystals using CsCl flux. The obtained single crystals have a platelike shape with a size of 0.5-2.

Superconducting transition temperatures in the electronic and magnetic phase diagrams of SrVFeAsO , a superconductor.

We elucidate the magnetic phases and superconducting (SC) transition temperatures (T ) in SrVFeAsO (21113V), an iron-based superconductor with a thick-blocking layer fabricated from a perovskite-related transition metal oxide. At low temperatures (T  <  37.1 K), 21113V exhibited a SC phase in the range 0.

Non-Fermi Liquids as Highly Active Oxygen Evolution Reaction Catalysts.

The oxygen evolution reaction (OER) plays a key role in emerging energy conversion technologies such as rechargeable metal-air batteries, and direct solar water splitting. Herein, a remarkably low overpotential of ≈150 mV at 10 mA cm in alkaline solutions using one of the non-Fermi liquids, HgRuO, is reported. HgRuO displays a rapid increase in current density and excellent durability as an OER catalyst.

Synthesis and physical properties of double perovskite Pb(2)FeReO(6).

An ordered double perovskite Pb(2)FeReO(6) was prepared at 6 GPa and 1000 degrees C. Despite the presence of Pb(2+) ions at the A site, its crystal structure was determined in a synchrotron X-ray powder diffraction study to be a centrosymmetric one with the space group I4/m (a = 5.62 A and c = 7.

Pressure-induced transformation of 6H hexagonal to 3C Perovskite structure in PbMnO3.

A tetragonal perovskite PbMnO(3) was obtained by treating the 6H hexagonal perovskite phase at 15 GPa and 1273 K. Structural analysis using synchrotron X-ray diffraction suggested that PbMnO(3) crystallizes in the centrosymmetric space group P4/mmm, unlike PbTiO(3) and PbVO(3) which have a polar structure in space group P4mm. Iodometric titration revealed the presence of the oxygen deficiency of x = 0.