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|Type:||Artigo de periódico|
|Title:||Structural And Electrochemical Characterization Of A Cobalt Phthalocyanine Bulk-modified Sio2/sno2 Carbon Ceramic Electrode|
|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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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