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Type: Artigo de periódico
Title: Structural And Electrochemical Characterization Of A Cobalt Phthalocyanine Bulk-modified Sio2/sno2 Carbon Ceramic Electrode
Author: Arguello J.
Magosso H.A.
Ramos R.R.
Canevari T.C.
Landers R.
Pimentel V.L.
Gushikem Y.
Abstract: A cobalt phthalocyanine bulk-modified carbon ceramic composite has been prepared by using sol-gel processing, and characterized by BET surface area, X-ray photoelectron spectroscopy, scanning electron microscopy and atomic force microscopy. A water-soluble 3-n-propylpyridinium chloride silsesquioxane (SiPyCl), an ion exchanger polymer, was employed to attach cobalt(II) tetrasulfophthalocyanine (CoTsPc) and prevent its leakage, as well as, to ensure adequate dispersion in the sol-gel network. The modified electrode built in a rigid disk-format displayed good electrocatalytic behavior towards the oxidation of oxalic acid at 0.84 V (SCE), as evidenced by the enhancement of the anodic current peak intensity when the concentration of oxalic acid was increased. A linear response was found in the range of 1.6 × 10-5 to 1.5 × 10-3 mol l-1 with a detection limit of 7.1 × 10-6 mol l-1. © 2008 Elsevier Ltd. All rights reserved.
Citation: Electrochimica Acta. , v. 54, n. 7, p. 1948 - 1953, 2009.
Rights: fechado
Identifier DOI: 10.1016/j.electacta.2008.06.023
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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