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Nanostructured Alpha‐Nickel Hydroxide Electrodes for High Performance Hydrogen Peroxide Sensing
Author(s) -
Martins Paulo Roberto,
Gonçalves Nery Motta Alessandra,
Nakamura Marcelo,
Araki Koiti,
Angnes Lúcio
Publication year - 2013
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201300288
Subject(s) - hydrogen peroxide , amperometry , hydroxide , tin oxide , nickel , nickel oxide , detection limit , inorganic chemistry , electrode , flow injection analysis , chemistry , nuclear chemistry , materials science , oxide , electrochemistry , chromatography , organic chemistry
Nanostructured alpha‐nickel hydroxide (α‐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 α‐Ni(OH) 2 electrodes exhibited a broad dynamic range (5×10 −6 to 1×10 −3 mol L −1 ), low detection limit (2×10 −7 mol L −1 ), good repeatability ( RSD =1.29 % for 20 successive analyses), and a sensitivity greater than 500 µA mmol −1 L −1 cm −2 .