A procedure is outlined for fabricating well-behaved microelectrodes from ceramic pellets of YBa2Cu307 and Bi2Sr2CaCu208which involves systematic polishing of an epoxy-encapsulated superconductor chip, under Et4NC104/acetonitrile solution, to a potentiometric end point Voltammetry of the resulting microelectrodes in acetonitrile is illustrated and compared to that arising from alternative superconductor electrode geometries. The microelectrodes have active electrode surface areas ranging from 2 x 10-6to 3 x 10- 4cm2, as characterized electrochemically and microscopically. The results discussed herein are significant steps toward developing the methodology necessary to study the electrochemical response of high temperature superconductor phases at temperatures below their superconductor critical temperature.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry