Nanostructured Alpha-Nickel Hydroxide Electrodes for High Performance Hydrogen Peroxide Sensing

Autor(es)

Martins, Paulo Roberto ^[1] ; Nery Motta, Alessandra Goncalves ^[1] ; Nakamura, Marcelo ^[1] ; Araki, Koiti ^[1] ; Angnes, Lucio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electroanalysis; v. 25, n. 9, p. 2060-2066, SEP 2013.
• Citações Web of Science: 7

Resumo

Nanostructured alpha-nickel hydroxide (-Ni(OH)(2)) immobilized on a Fluorine-doped Tin Oxide (FTO) surface was explored for the construction of hydrogen peroxide amperometric Flow Injection Analysis (FIA) sensors. Their notable electrocatalytic activity and heterogeneous electron-transfer rate were confirmed by the appearance of a broad and intense peak associated with the oxidation of hydrogen peroxide and the enhancement of sensibility in hydrodynamic conditions. The -Ni(OH)(2) electrodes exhibited a broad dynamic range (5x10(-6) to 1x10(-3)molL(-1)), low detection limit (2x10(-7)molL(-1)), good repeatability (RSD=1.29% for 20 successive analyses), and a sensitivity greater than 500 mu A mmol(-1)L(-1)cm(-2). (AU)

• Processo FAPESP: 11/21227-8 - Desenvolvimento de sensores amperométricos baseados em sóis mistos de a-NiCo(OH)2 e óxidos de níquel/cobalto e sua associação com nanotubos de carbono/grafeno
• Beneficiário: Paulo Roberto Martins
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado