Transition metal spinel oxides comprised of earth-abundant Mn and Co have long been explored for their use in catalytic reactions energy storage. However, understanding functional properties can be challenging due to differences sample preparation the ultimate structural materials. Epitaxial thin film synthesis provides a novel means producing precisely controlled materials explore variations r...

In this work, p-type oxide semiconductors, Co3O4 and complex oxides NixCo3−xO4 (x = 0.04, 0.07, 0.1), were studied as materials for sub-ppm H2S sensing in the temperature range of 90–300 °C dry humid air. Nanocrystalline 0.1) prepared by coprecipitation cobalt nickel oxalates from nitrate solutions further annealing at 300 °C. The surface reactivity obtained toward both atmosphere (relative hum...

Simultaneous TG/DSC measurements performed on mixtures 2Li2CO3-5TiO2 (anatase) subjected to high-energy milling showed that both the temperature and the enthalpy of Li2CO3 decomposition are much lower than in the case of TG/DSC runs performed on a sample of a physical mixture. On the basis of the thermoanalytical evidence a solid-state synthesis of the spinel compound Li4Ti5O12 has been propose...

Multinuclear solid-state nuclear magnetic resonance studies (185/187Re, 55Mn, 75As, and 1H NMR) were undertaken on a series of polycrystalline inorganic salts incorporating diamagnetic XO4 groups, X being a half-integer quadrupolar nucleus. Exploiting data acquisition protocols that were recently developed for observing undistorted half-integer quadrupole central transitions, some of the larges...

Copper manganese oxide spinels and related (multiphase) materials with the formula CuxMn3−xO4 are active catalysts in a wide variety of industrially important processes due to their great diversity phase relations, metal ion valence/site distribution, chemical properties. In this review, we summarize preparation methods effects on composition, properties, catalytic properties various Cu/Mn rati...