Cu-Ni alloys in electrochemical oxygen analysis

Cu-rich Cu-Ni alloys (containing 70-90% Cu) are shown to be excellent indic ator electrode materials for voltammetric measurements at cathodic potentia ls. These electrodes have been characterised using a variety of methods: ro tating disk voltammetry, amperometric measurements and sono-ring-disk volta mmetry. The mechanism of electrochemical oxygen reduction at the Ni-30Cu al loy has been established. The results are compared with the surface study r esults.