The electrosynthesis of ozone at ambient temperature can be achieved using anodes (preferably PbO2) in aqueous, buffered electrolytes (neutral to slightly acidic media). Traces of highly adsorbing anions raise the oxygen overpotential and the 03 yield, whilst anions with a high charge/radius ratio as well as certain transition metal ions have detrimental effects. Ozone is evolved at high electrode potentials despite corrosion of the (PbO2, Pt or Au) anode. The same is true in general, when competing electrooxidations occur (e.g. with C10~). At fixed temperature and current density the Oa yield at a PbOz anode decreases when the pressure is raised from 1 to 10 atm.
Dimensionally stable lead dioxide anodes on a titanium substrate [2, 3] were tested for application in ozone electrosynthesis in a variety of aqueous electrolytes. At room temperature an ozone concentration of up to 13% by weight in the anodic gas composed of O3 and O2 is attained by using an aqueous phosphate electrolyte.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.