As cycling, the electrolyte can soak into the ZnCo2O4 particles, and the active ZnCo2O4 is converted to lower oxidation state, cobalt oxide, zinc oxide, and Li2O.
A metal oxide is reduced to a lower oxidation state in air with concentrated solar energy.
Oxidative coupling is favored by lower oxidation state catalysts whereas ring oxidation is favored by high oxidation state systems.
Although neptunium oxides have not been produced with neptunium in oxidations as high as those possible with the adjacent actinide uranium, neptunium oxides are more stable at lower oxidation levels.
Complexes of metal ions in high oxidation states are sometimes more readily formed by adding the ligands to a solution of the metal ion in a lower oxidation state in the presence of an oxidizing agent.
(The most important respect in which zirconium differs from titanium is that lower oxidation states are of minor importance).
Those found in nature have the +5 oxidation state, but compounds of lower oxidation states (+2 to +4) have been prepared.
Tantalum is usually in the +5 oxidation state in its compounds; lower oxidation states, especially from +2 to +4, have been prepared.
The astatate ion, (AtO3)−, is coprecipitated with insoluble iodates, such as silver iodate (AgIO3), and is obtained by the oxidation of lower oxidation states with hypochlorite, periodate, or persulfate.
The most important respect in which hafnium differs from titanium is that lower oxidation states are of minor importance; there are relatively few compounds of hafnium in other than its tetravalent states.
The electrochemical chlorination fails for azulenes with lower oxidation potentials.
