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Type: Artigo de periódico
Title: Electrocatalytic determination of nitrite on a rigid disk electrode having cobalt phthalocyanine prepared in situ
Author: Canevari, TC
Luz, RCS
Gushikem, Y
Abstract: This work reports an in situ cobalt(II) phthalocyanine (CoPc) synthesis on a SiO2/SnO2 (SiSn) matrix surface obtained by the sol-gel method and its electrocatalytic activity for oxidation of nitrite. A rigid disk electrode with SiSn/CoPc was used to study the electrooxidation of nitrite by the cyclic voltammetric, chronoamperometric techniques and differential pulse voltammetry (DPV). The adsorbed phthalocyanine electrocatalyzed nitrite oxidation at 0.73 V (versus SCE) using the DPV technique. The anodic peak current intensities, plotted from differential pulse voltammograms in 1 mol L-1 KCl for the concentration range 0.002 to 3.85 mmol L-1 of nitrite were linear, with a correlation coefficient of 0.998 and a detection limit of 0.95 mu mol L-1.
Subject: phthalocyanine
SiO2/SnO2 mixed oxide
nitrite oxidation
Country: Alemanha
Editor: Wiley-v C H Verlag Gmbh
Citation: Electroanalysis. Wiley-v C H Verlag Gmbh, v. 20, n. 7, n. 765, n. 770, 2008.
Rights: fechado
Identifier DOI: 10.1002/elan.200704082
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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