Electrochemical Behavior of a Glassy Carbon Electrode Chemically Modified with Nickel Pentacyanonitrosylferrate in Presence of Sulfur Compounds
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Data
2011-06-01
Autores
Paim, Leonardo L. [UNESP]
Hammer, Peter [UNESP]
Stradiotto, Nelson Ramos [UNESP]
Título da Revista
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Título de Volume
Editor
Wiley-Blackwell
Resumo
The glassy carbon electrode was modified with a nickel pentacyanonitrosylferrate film by electrodeposition of Ni and subsequent derivatization with NaPCNF. The film was characterized by XPS and electrochemical methods. Cyclic voltammetry of the NiPCNF onto the GC shows a redox couple (Fe(III)/Fe(II)) with E(ol) of 538 mV (I(pa)/I(pc) around 1) and Delta E(p) of 93 mV in 0.5 mol L(-1) KNO(3), with a diffusion-controlled process. There was a decrease of anodic peak currents of the film in the presence of sulfide and 2-propanethiol due to a precipitation reaction on the film surface by nucleophilic attack.
Descrição
Palavras-chave
Mercaptan, Sulfide, Nickel pentacyanonitrosylferrate, Cyclic voltammetry, Square wave voltammetry
Como citar
Electroanalysis. Malden: Wiley-blackwell, v. 23, n. 6, p. 1488-1496, 2011.