Mechanism and kinetics of the electrochemical reduction of Cu(II) at gold in pyridine and water-pyridine mixtures

Autor:	Mieczyslaw Scendo, Jan Malyszko
Rok vydání:	1997
Předmět:	Coulometry chemistry.chemical_compound chemistry Inorganic chemistry Pyridine Electrode chemistry.chemical_element General Chemistry Quartz crystal microbalance Electrolyte Electrochemistry Voltammetry Copper
Zdroj:	Monatshefte f�r Chemie Chemical Monthly. 128:123-135
ISSN:	1434-4475 0026-9247
DOI:	10.1007/bf00807301
Popis:	The cathodic reduction of Cu(II) ions at a gold electrode has been studied in waterpyridine mixtures containing NaClO4 as background electrolyte by means of rotating disc (RDE) and ring-disc electrode voltammetry (RRDE), coulometry, and potentiometry. The voltammetric curves obtained at the RDE split into two waves of nearly the same height which correspond to two successive reactions: Cu(II) + e− → Cu(I) and Cu(I) + e− → Cu. The diffusion coefficients of Cu(II) as well as the formal potentials and kinetic parameters of the Cu(II)/Cu(I) electrode reaction were evaluated and are discussed. In addition, some experiments with an electrochemical quartz crystal microbalance (EQCM) were performed in order to explain the pyridine adsorption on polycrystalline gold.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::16220ae0fd125db1a367b586ec0f6bc3 https://doi.org/10.1007/bf00807301 Zobrazit plný text záznamu Full text from SpringerLink