Electrochemical Behavior of a Glassy Carbon Electrode Chemically Modified with Nickel Pentacyanonitrosylferrate in Presence of Sulfur Compounds

Autor(es)

Paim, Leonardo L. ^[1] ; Hammer, Peter ^[2] ; Stradiotto, Nelson R. ^[1]

Afiliação do(s) autor(es)

^[1] UNESP, Inst Quim, Dept Quim Analt, BR-14801970 Araraquara, SP - Brazil

^[2] UNESP, Inst Quim, Dept Fis Quim, BR-14801970 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electroanalysis; v. 23, n. 6, p. 1488-1496, JUN 2011.
• Citações Web of Science: 1

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. (AU)

• Processo FAPESP: 04/09326-7 - Aplicação da espectroscopia de fotoelétrons induzida por raios-X (XPS) em nanomateriais, sensores e cerâmicas
• Beneficiário: Celso Valentim Santilli
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 07/07700-7 - Desenvolvimento de sensores baseados em eletrodos modificados com pentacianonitrosilferratos para determinação de compostos sulfurados em gás natural
• Beneficiário: Leonardo Lataro Paim
• Modalidade de apoio: Bolsas no Brasil - Doutorado