Electrooxidation of sulfide by cobalt pentacyanonitrosylferrate film on glassy carbon electrode by cyclic voltammetry


Autoria(s): Paim, Leonardo L.; Stradiotto, Nelson Ramos
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

01/05/2010

Resumo

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Processo FAPESP: 07/07700-7

Processo FAPESP: 04/09326-7

A glassy carbon (GC) electrode was modified with cobalt pentacyanonitrosylferrate (CoPCNF) film. Cyclic voltammetry (CV) of the CoPCNF onto the GC (CoPCNF/GC) shows a redox couple (Fe(III)/Fe(II)) with a standard potential (E(0)') of 580 mV. The current ratio I(pa)/I(pc), remains almost 1, and a peak separation (Delta E(p)) of 106 mV is observed in 0.5 M KNO(3) as the supporting electrolyte. Anodic peak currents were found to be linearly proportional to the scan rate between 10 and 200 mVs(-1), indicating an adsorption-controlled process. The redox couple of the CoPCNF film presents an electrocatalytic response to sulfide in aqueous solution. The analytical curve was linear in the concentration range of 7.5 x 10(-5) to 7.7 x 10(-4) M with a detection limit of 4.6 x 10(-5) M for sulfide ions in 0.5 M KNO(3) solution. (C) 2010 Elsevier Ltd. All rights reserved.

Formato

4144-4147

Identificador

http://dx.doi.org/10.1016/j.electacta.2010.02.082

Electrochimica Acta. Oxford: Pergamon-Elsevier B.V. Ltd, v. 55, n. 13, p. 4144-4147, 2010.

0013-4686

http://hdl.handle.net/11449/25759

10.1016/j.electacta.2010.02.082

WOS:000277914200011

Idioma(s)

eng

Publicador

Pergamon-Elsevier B.V. Ltd

Relação

Electrochimica Acta

Direitos

closedAccess

Palavras-Chave #Sulfide #Cobalt pentacyanonitrosylferrate #Cyclic voltammetry #Modified electrode
Tipo

info:eu-repo/semantics/article