Cerium(IV) oxide used as a mixed conductor. Ceria is of interest as a material for solid oxide fuel cells (SOFCs) because of its relatively high oxygen ion conductivity (i.e. oxygen atoms readily move through it) at intermediate temperatures (500–650 °C) and lower association enthalpy compared to Zirconia system. The cerium(IV) oxide–cerium(III) oxide cycle or CeO/CeO cycle is a two step thermochemical water splitting process based on cerium(IV) oxide and cerium(III) oxide for hydrogen production. Cerium(IV) oxide Cerium(IV) oxide, also known as ceric oxide, ceric dioxide, ceria, cerium oxide or cerium dioxide, is an oxide of the rare-earth metal cerium. It is a
Dihydrogen complex some cases, hydrogen ligands are usefully characterized by X-ray crystallography, but often the presence of metals, which strongly scatter X-rays, complicates the analysis. The triangular MH subunit has six normal modes of vibration, one of which is mainly of ν character. In free H, this very strong bond absorbs at 4300 cm, whereas in dihydrogen complexes the frequency drops to around 2800 cm. Two preparation methods involve the direct reactions with H gas. The first entails the addition of H to an unsaturated metal center, as originally reported for W(CO)(P-i-Pr)(H). In such cases, the unsaturated complex in fact features an