An oxygen sensor using zinc-air electrochemical cells: A simple device to demonstrate applied technology in electrochemistry teaching

• Autores: Agus Setiabudi, Galuh Yuliani, Zakiyah Pawitan
• Localización: School Science Review, ISSN 0036-6811, Vol. 97, Nº. 361, 2016, págs. 30-34
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • We have developed an electrochemical cell to demonstrate a simple oxygen sensor.

    It consists of a small sheet of zinc as the anode, a carbon bar or rod (as available) as the cathode, KOH-bentonite paste (a mixture of potassium hydroxide solution and bentonite clay) as the electrolyte, and some oxygen scavenger. In this simple sensor, a decrease in oxygen concentration caused by the reaction with the oxygen scavenger can be observed as a decrease in cell potential difference. The device can be used to demonstrate the use of electrochemical cells as gas sensors and therefore as a medium to teach an application of electrochemistry.