| 초록 |
Lead dioxide electrodes are still industrially important and cheap electrodes for energy storage and delivery applications. But, controlling the dissolution of positive lead dioxide is a challenging factor to increase its life time. To overcome this problem, many metal ions are incorporated along with PbO2. In this way group IIA metals are considered as significant dopants to stabilize the positive PbO2 material. Thus, Pb-Ca, Pb-Ba, and Pb-Sr-Ba alloys are commercially available for the real application. Among them, Ba metal has shown enhanced electrode hardness and stability. Herein, the Ba.PbO2 electrode was electrochemically prepared and utilized as NH3 sensor. At first, current density and concentration of precursor of Barium and Lead were varied, concentration ratio between Pb to Ba was also considered. All the electro-depositions were carried out at 65 °C in 0.2 M H3BO3. The as prepared electrodes examined through SEM and XRD analyses. Further, the prepared electrode was subjected to determination NH3 through cyclic voltammetry technique in various pH solutions. |
