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The nature of the prior chemical steps in the electroreduction of Ni(II) from citrate and tartrate media

✍ Scribed by D.A. Aikens; F. Pushpanaden

Book ID
103066912
Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
579 KB
Volume
27
Category
Article
ISSN
0013-4686

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✦ Synopsis

The etecectroreduction of Ni(lI) from acidic citrate above pH 1.5 and from tartrate above pH 7 is governed by the rate of a prior chemical step. Analysis of the dependence of the limiting current on pH and the concumation of the hydroxyacidby Koutecky's method leads to establishment of the stoicbiometry of the prior c&m&al steps. In acidic citrate the prior chmical step is the d' mociation of NiH&it+ * or the protor assisted disoeiation of NiHCit. In alkaline tartrate the prior chemical step is the hydrolytic conversion of _, 1 NiHTar-' to NiH,Tar. Ammonia also converts the elcctroinactive species NiTar-' in a prior chemical step to the elcctroactive mixed bis amohctartrate complex.

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Desolvation step preceding electroreduct
Desolvation step preceding electroreduction and the electrochemical reactions of the Ni(II)/Ni(Hg) system in dimethylformamide (DMF) and its mixtures with water
✍ Laura Janiszewska; Zbigniew Galus πŸ“‚ Article πŸ“… 1982 πŸ› Elsevier Science 🌐 English βš– 775 KB

The kinetics of the electrode reaction of the Ni(Il)/Ni(Hg) system in DMF and its mixtures with water at different concentrations of several background electrolytes has been studied. Similarly to aqueous solutions, at higher background electrolyte concentrations the charge transfer step is preceded