Direct electrochemical detection mechanism of ammonia in aqueous solution using Cu-decorated Si microelectrodes
Short communication
DOI:
https://doi.org/10.5599/jese.1843Keywords:
ammonia detection, electrochemical sensing, copper nanoparticles, silicon nanowalls, porous silicon, copper complex
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.
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Funding data
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Consejo Nacional de Ciencia y Tecnología
Grant numbers 21077;316537 -
Vicerrectoría de Investigación y Estudios de Posgrado, Benemérita Universidad Autónoma de Puebla
Grant numbers 00185-VIEP2023
