Electrochemical behaviour of molybdenum electrodes in various aqueous and buffered solutions and their use in titrations T he open circuit potential of Mo electrodes has been followed as a function of time in H. A. EL SHAYEB various aqueous solutions until steady state values E st were obtained. T hese varied with the F. M. ABD EL WAHAB logarithm of the molar concentration C as E st =a+b log C. T he rate of oxide film thicken-E. A. ABD EL MEGUID ing was determined from the linear relationship between the open circuit potential of Mo E and the logarithm of immersion time t as E=a 1 +b 1 log t. A plot of the final steady state potential of Mo as a function of the pH of buVered solutions fits the linear relationship E st =a 2 −b 2pH. T he oxide film formed on Mo provides the opportunity to use the metalmetal oxide as an indicator electrode for potentiometric acid-base and precipitation titrations. In the case of redox titrations, the Mo electrode could not be used successfully on its own, but when coupled with platinum as a bimetallic pair electrode, excellent results were obtained when used as an indicator electrode for oxidation-reduction reactions.
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.