标题：Nanoporous Gold Leaf for Amperometric Determination of Nitrite
作者：Ge, X.;Wang, L.;Liu, Z.;Ding, Y.
作者机构：[Ge, X] School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;[ Wang, L] School of Chemistry and Chemical Engineering 更多
通讯作者地址：[Ding, Y]Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China.
关键词：Amperometric;Dealloying;Nanoporous gold;Nitrite determination;Sensor
摘要：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 1μM to 1mM. This nanostructured gold electrode displays good stability, repeatability and selectivity which suggests its potential for the development of new electrochemical sensors.