Determination of NiS, NiSe and PdS formation orders during electroreduction of thiocyanate, selenocyanate and thiourea complexes of Ni(II) and PD(II) at mercury electrodes

Autor:	Tadeusz Krogulec, Tomasz J. Hrynaszkiewicz, Ewa Cieszynska, Jan Kozłowski
Rok vydání:	1994
Předmět:	Electrolysis Order of reaction Thiocyanate General Chemical Engineering Metal ions in aqueous solution Inorganic chemistry Dropping mercury electrode Chronoamperometry Electrochemistry Analytical Chemistry law.invention chemistry.chemical_compound Thiourea chemistry law
Zdroj:	Journal of Electroanalytical Chemistry. 367:213-221
ISSN:	1572-6657
DOI:	10.1016/0022-0728(93)03045-q
Popis:	The electroreduction of Ni(II) and PD(II) thiocyanate complexes, Ni(II) selenocyanate complexes and Ni(II) thiourea complexes has been studied at mercury electrodes. It has been confirmed in each case that the ligands undergo electroreduction, as do the metal ions, resulting in NiS, NiSe and PdS precipitate formation. A.c. chronoamperometry was used to determine the formation order of NiS and NiSe in the Ni(II)-thiourea and Ni(II)-selenocyanate systems. A new method of determining this reaction order was proposed on the basis of quantitative analysis of the electroreduction products obtained during potentiostatic electrolysis at a large mercury electrode. The formation orders of NiS and PdS in the Ni(II)-SCN − and Pd(II)-SCN − systems were determined by this method.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::20aaf114eb6fc2c7946503a14bbfa4f7 https://doi.org/10.1016/0022-0728(93)03045-q Zobrazit plný text záznamu