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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Paim, Leonardo L. [1] ; Stradiotto, Nelson R. [1]
Total Authors: 2
[1] Univ Estadual Paulista UNESP, Inst Chem, Dept Analyt Chem, BR-14801970 Araraquara, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Electrochimica Acta; v. 55, n. 13, p. 4144-4147, MAY 1 2010.
Web of Science Citations: 33

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. (AU)

FAPESP's process: 07/07700-7 - Development of sensors based on modified electrodes with pentacyanonitrosylferrates for determination of sulphur components in natural gas
Grantee:Leonardo Lataro Paim
Support type: Scholarships in Brazil - Doctorate