Nanoporous Gold Leaf for Amperometric Determination of Nitrite |
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| Authors: | Xingbo Ge Liqin Wang Zhaona Liu Yi Ding |
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| Institution: | 1. School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P.?R. China tel.: +86‐531‐88366513;2. fax: +86‐531‐88366512 |
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| Abstract: | 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. |
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| Keywords: | Nanoporous gold Nitrite determination Sensor Dealloying Amperometric |
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