Investigation of the mechanism of electrosynthesis of the superconductor, barium potassium bismuth oxide (Ba1-xKxBiO3)

Autor:	Robert S. Glass, John C. Estill, Gerald L. Roberts, Susan M. Kauzlarich
Rok vydání:	1993
Předmět:	Electrolysis Chemistry General Chemical Engineering Inorganic chemistry Analytical chemistry General Chemistry Quaternary compound Electrosynthesis Electrochemistry law.invention Surface coating law Electrode Materials Chemistry Cyclic voltammetry Stoichiometry
Zdroj:	Chemistry of Materials. 5:1645-1650
ISSN:	1520-5002 0897-4756
Popis:	Cyclic voltammetry has been used to investigate the electrodeposition of the superconducting material, Ba[sub 1[minus]x]K[sub x]BiO[sub 3]. 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 Bi[sup III] to Bi[sup V] oxidation appears as two peaks during the anodic scan. Reproducible cyclic voltammograms were obtained only after the KOH flux containing Ba(OH)[sub 2] and Bi[sub 2]O[sub 3] 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 Bi[sup III] to Bi[sup IV] oxidation peak. 48 refs., 6 figs., 1 tab.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7629b6f557f32359094ca3cac61d1869 https://doi.org/10.1021/cm00035a011 Zobrazit plný text záznamu