Abstract
The coulostatically controlled underpotential deposition (UPD) processes on gold and platinum and on gold have been shown to lead to anodic potential excursions (1). Chemical reactions that precede and/or accompany coulostatic underpotential deposition can produce two other kinds of potential relaxation. For example, the potential of an oxidized gold electrode, on being open‐circuited in Hg(I) solutions, shifts continuously to a more cathodic potential until equilibrium is reached. The Hg(I) reduces the gold oxide and then produces a UPD mercury layer on the gold surface through the disproportionation reactionThe potential shift ceases when the Nernst potential is reached. The potential of a reduced gold electrode, on being open‐circuited in a Hg(I) solution, initially shifts anodically and then shifts cathodically until equilibrium is reached. The initial anodic shift is due to a conventional coulostatic deposition mechanism while the subsequent cathodic shift is due to the disproportionation mechanism given above.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
