Cyclic voltammetry has been used to investigate the electrodeposition of the superconducting material, Ba1-xKxBiO3. Reactions occurring at a Pt substrate electrode over a wide potential range have been assigned. Evidence has been found for time-dependent (cycle number) electrochemical behavior. High-quality superconducting crystals can be obtained only when the potential of the electrode is held in the region of predominantly kinetic control. The BiIII to BiV oxidation appears as two peaks during the anodic scan. Reproducible cyclic voltammograms were obtained only after the KOH flux containing Ba(OH)2 and Bi2O3 was equilibrated for 24 h under a water-saturated argon atmosphere. High-quality superconductive crystals are obtained only when the deposition potential is on the rising portion of the BiIII to BiIV oxidation peak.
|Original language||English (US)|
|Number of pages||6|
|Journal||Chemistry of Materials|
|State||Published - 1993|
ASJC Scopus subject areas
- Materials Chemistry
- Materials Science(all)