Short communication, Note

https://doi.org/10.5599/jese.1843

Direct electrochemical detection mechanism of ammonia in aqueous solution using Cu-decorated Si microelectrodes

Alfredo Emmanuel Hench-Cabrera ; Institute of Physics, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Mexico
Enrique Quiroga-González ; Institute of Physics, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Mexico *

* Corresponding author.

Abstract

Most of the reports on electrochemical ammonia detection with copper electrodes have been performed at pH 10 or higher. However, according to phase diagrams, no reactions take place between copper and ammonia under those conditions, qualifying such detec­tion of ammonia as indirect. This short paper deals with the detection of ammonia concen­tration in the micromolar range through a direct mechanism at pH 9, using a Cu-decorated microstructured Si electrode. The reaction mechanism is thoroughly studied.

Keywords

Ammonia detection; electrochemical sensing; silicon nanowalls; copper nanoparticles; Cu complex

Hrčak ID:

311014

URI

https://hrcak.srce.hr/311014

Publication date:

7.12.2023.

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