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Nanoporous Gold Leaf for Amperometric Determination of Nitrite
Author(s) -
Ge Xingbo,
Wang Liqin,
Liu Zhaona,
Ding Yi
Publication year - 2011
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.201000320
Subject(s) - nanoporous , amperometry , nitrite , electrode , repeatability , electrochemistry , selectivity , linear range , inorganic chemistry , materials science , chemistry , nanotechnology , detection limit , chromatography , catalysis , organic chemistry , nitrate
Ultra‐thin free‐standing nanoporous gold leaf made by dealloying exhibits excellent electrocatalytic activities toward nitrite oxidation. The electrochemical responses of nitrite ions on this novel nano‐electrode is found not dependent on pH over a wide range from 4.5 to 8.0, which is markedly different from that of gold oxidation, a process known to be highly pH‐sensitive. Amperometric study shows a linear relationship for nitrite determination in a concentration range from 1 µM to 1 mM. This nanostructured gold electrode displays good stability, repeatability and selectivity which suggests its potential for the development of new electrochemical sensors.