Previous measurements show that calcium manganese oxide nanoparticles are better water oxidation catalysts than binary manganese oxides (Mn3O4, Mn2O3, and MnO2). The probable reasons for such enhancement involve a combination of factors: The calcium manganese oxide materials have a layered structure with considerable thermodynamic stability and a high surface area, their low surface energy sugg...

The novel heterometallic polyoxotitanate cage [Ti18MnO30(OEt)20(MnPhen)3] (1), obtained by solvothermal reaction of Ti(OEt)4 with Mn(AcO)3·(H2O)2 and 1,10-phenanthroline (Phen) in EtOH, has a C3 symmetric core structure containing an interstitial tetrahedral Mn(II) ion and is surrounded by three Mn(II)(Phen) fragments. The molecular structure is retained in thin film electrodes of 1 deposited b...

The powder oxide state is essential for resilient metallurgy components using Hot Isostatic Pressing (HIP) process. In fact, it can affect the behaviour of during different additive manufacturing processes. However, layer properties as a function particle size are not well known yet. This work summaries detailed surface characterization 316L particles’ gas atomization to permit better understan...

In contrast to the corundum-type A2X3 structure, which has only one crystallographic site available for trivalent cations (e.g., in hematite), closely related ABX3 ilmenite-type structure comprises two different octahedrally coordinated positions that are usually filled with differently charged ions Fe2+Ti4+O3 ilmenite). Here, we report a synthesis of first binary compound fabricated from simpl...

We, for the first time, report that many Mn oxides (Mn3O4, α-Mn2O3, β-MnO2, CaMnO3, Ca2Mn3O8, CaMn3O6 and CaMn4O8) in the presence of cerium(IV) ammonium nitrate, in the water oxidation, convert to layered Mn oxide. This layered Mn oxide is an efficient water oxidizing catalyst.

Mixed-valent MnO(x) (1 < x < 2) was selectively synthesized by chemically etching MnO and Mn2O3 with ceric ammonium nitrate. The obtained MnO(x) exhibited greatly enhanced electrocatalytic activity toward the oxygen reduction reaction (ORR) as compared to the corresponding pristine oxides.

The compounds in the systems, which contain alkaline-earth, rare-earth, transitional d -metal and oxygen, are actively studied view of wide range their physical properties practical applications. Ceramic samples were synthesis by solid-state reaction method starting from high-purity CaCO 3 , Nd 2 O Mn powders. At a first stage, reagents mixed heated muffle furnace at 1000 °С during 24 h for dec...

Powder mixture consisted of ZnO, Mn2O3 (MnCO3) and Fe2O3 blended powders, was found laminating during compaction. Polyvinyl alcohol (PVA) a combination PVA with polyethylene glycol (PEG) added as plasticizer, were introduced polymer binders to improve the compaction oxide mixtures. It has been done by forming suspension varying solution concentration composition. By evaporating solvent, new mat...