Catalysis of water oxidation in acetonitrile by iridium oxide nanoparticles.

ABSTRACT: Water oxidation catalysed by iridium oxide nanoparticles (IrO₂ NPs) in water-acetonitrile mixtures using [Ru^III(bpy)₃]³⁺ as oxidant was studied as a function of the water content, the acidity of the reaction media and the catalyst concentration. It was observed that under acidic conditions (HClO₄) and at high water contents (80% (v/v)) the reaction is slow, but its rate increases as the water content decreases, reaching a maximum at approximately equimolar proportions (≈25% H₂O (v/v)). The results can be rationalized based on the structure of water in water-acetonitrile mixtures. At high water fractions, water is present in highly hydrogen-bonded arrangements and is less reactive. As the water content decreases, water cluste

SUBMITTER: Hidalgo-Acosta JC 

PROVIDER: S-EPMC5644119 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature