Poly-xanthurenic acid as an efficient mediator for the electrocatalytic oxidation of NADH |
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| Authors: | Francisco de Assis dos Santos Silva Cleylton Bezerra Lopes Erivaldo de Oliveira Costa Phabyanno Rodrigues Lima Lauro Tatsuo Kubota Marília Oliveira Fonseca Goulart |
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| Institution: | 1. Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, 57072-970 Maceió, AL, Brazil;2. Instituto de Química, UNICAMP, C. Postal 6154, 13084-971 Campinas, SP, Brazil;3. Instituto Nacional de Ciência e Tecnologia de Bioanalítica, UNICAMP, C. Postal 6154, 13084-971 Campinas, SP, Brazil |
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| Abstract: | This paper describes, for the first time, the development of a simple and highly sensitive chemical sensor based on a new electroactive material, electrogenerated in situ from xanthurenic acid on an electrode modified with MWCNT. The modified electrode shows efficient electrocatalytic oxidation activity towards NADH at an applied potential of 0.1 V vs. Ag/AgCl. The kinetic constant, kkin, for the electrocatalytic oxidation of NADH, evaluated by chronoamperometry and voltammetry using RDE, provided values close to 105 mol?1 L s?1. |
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