Kinetics and mechanism of hydroxylamine oxidation by (Fe2(III)(mu-O)(phen)4(H2O)2)4+ in aqueous media

Article Abstract:

Rapid partial hydrolysis of the complex ion (Fe2(III)(mu-O)(phen)4(H2O)2)4+ occurs in aqueous solutions with excess 1,10-phenanthroline (phen) and pH 3-9. The partially hydrolyzed ion also coexists with (Fe2(III)(mu-O)(phen)3(H2O)2)4+, (Fe2(III)(mu-O)(phen)4(H2O)(OH))3+ and (Fe2(III)(mu-O)(phen)4(OH)2)2+ according to equilibrium studies. Hydroxylamine is oxidized quantitatively by the solution to N2O and the solution is reduced to (Fe(phen)3)2+. Inner-sphere adducts may form between NH2OH and different (Fe2O)4+ species. A rate-determining one-electron transfer may occur to produce NHOH and (Fe2O)3+.

Iron compounds, Chemical equilibrium, Chemical reaction, Rate of, Chemical kinetics, Amines, Oxo compounds

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Photochemical reduction of CO2 using Cu-loaded silicate rock powder suspended in water

Article Abstract:

Carbon dioxide has been photochemically reduced using copper (Cu)-loaded silicate rock powder in suspension in water. The best catalyst was the 30% Cu-loaded quartzdiorite (0.3 g/g) in the Cu rocks and a rather low temperature was suitable. The system might be useful for photochemical production of raw materials for the photochemical industry.

Carbon dioxide, Copper, Photochemical research, Thermal properties, Silicates, Formic acid

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