Prussian blue films produced by pentacyanidoferrate(II) and their application as active electrochemical layers
| Autor: | Pires, Bruno Morandi, 1989, Jannuzzi, Sergio Augusto Venturinelli, 1987 |
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| Přispěvatelé: | Formiga, André Luiz Barboza, 1978, Bonacin, Juliano Alves, 1980, UNIVERSIDADE ESTADUAL DE CAMPINAS |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Repositório da Produção Científica e Intelectual da Unicamp Universidade Estadual de Campinas (UNICAMP) instacron:UNICAMP Repositório Institucional da Unicamp |
| Popis: | Agradecimentos: The authors acknowledge the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), the Fundo de Apoio ao Ensino, à Pesquisa e à Extensão - Universidade Estadual de Campinas (FAEPEX-UNICAMP) (1321/12), and Fundação de Amparo a Pesquisa do Estado de São Paulo (FAPESP) for financial support and the National Center for High Performance Computing in São Paulo (CENAPAD, Project 557/2013) for computational resources Abstract: Iron complexes such as ferri/ferrocyanides are usually em-ployed as electrochemical mediators in portable devices forthe quick diagnosis of diseases. Stable complexes designedfor the electrochemical active layer may render devices withbetter performance and lifetimes than conventional devices.In this work we have synthesized and characterized spectro-scopically, electrochemically, and by DFT the complex Na4[Fe(CN)5(isn)] (isn = isonicotinate). This complex wasused as a single-source precursor of Prussian Blue (PB) in solution at pH 2.0 and 3.0, as confirmed by UV/Vis spec-troscopy. Potentiostatic deposition of PB onto glassy carbonelectrodes provided stable films at pH 3.0 and 5.0, with elec-trocatalytic activity for ascorbic acid oxidation with a linearresponse in the range 20–200 µMand an limit of detection of12 µM. The anodic peak potential of the modified electrodesvaried with solution pH with a minimum value of 0.350 Vversus NHE at pH 5.0 CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP Fechado |
| Databáze: | OpenAIRE |
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