Citation: Jia Wei YAN, Jun Tao LU, Pei Fang LIU. Powder Microelectrodes Applied to NO₂^- Detection[J]. Chinese Chemical Letters, ;1999, 10(1): 47-50. shu

Powder Microelectrodes Applied to NO₂^- Detection

Department of Chemistry, Wuhan University, Wuhan 430072

Received Date: 23 April 1998

Fund Project: The authors are grateful to the National Natural Science Foundation of China for financial support.

The reduction of nitrite at Au or carbon electrode in H₂SO₄ was found to follow a chemical-electrochemical (CE) mechanism with a very thin (4x10^-8 cm) preceding reaction zone. It was proposed and experimentally verified that for such kind of electrode processes the total reaction rate could be effectively enhanced by using electrodes with increased true surface area, such as porous electrodes. As a combination of porous electrode and microelectrode, the powder microelectrode shows excellent performance for nitrite detection.
- Nitrite reduction,
- microelectrode,
- CE mechanism
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