On the Anomalous Behavior of Zn/Ni UPD at Pt(111) Single Crystalline Electrode in Borate Containing Solution

摘要

Underpotential deposition (UPD) of Zn and/or Ni ions at Pt(111) electrode was carried out inborate containing solution. The presence of borate in the solution was found to assist the appearance ofsharp peak of Zn UPD at pH > 4, with consistency of our previous work. Zn UPD was found to occurat the so called butterfly wave potential range while Ni UPD occurs within the hydrogen2+ 2+ adsorption/desorption region. In the case of electrolyte containing both Zn and Ni ions, the UPD ofZn, occurs at the most positive potential value and leads to suppression of Ni UPD process.