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<p>Solid-state electrochemical sensors based on yttria-stabilized zirconia (YSZ) are commonly used in various industrial applications to analyze gaseous media. One of the important industrial tasks is the determination of carbon monoxide content in various gas environments at elevated temperatures. This work describes the preparation and characterization of an amperometric solid electrolyte sensor, which is used to measure the carbon monoxide content in inert gases (nitrogen, argon, and helium) at temperatures ranging from 600 to 700&#xa0;°C. The sensor exhibited a linear relationship between the limiting current as a sensor reading and carbon monoxide concentration in the gas mixtures analyzed within the range of 1 to 10 vol.% CO. The diffusion coefficients of carbon monoxide in nitrogen, helium, and argon were also assessed using the obtained limiting current values. The dynamic characteristics of the sensor used to measure carbon monoxide content were obtained and confirmed to be highly sensitive, with a fast response and reproducibility in all gas mixtures studied. Therefore, the proposed sensor construction can be utilized for CO analysis at elevated temperatures.</p>

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An electrochemical sensor for the determination of concentration and diffusion coefficient of CO in inert gases

  • 期刊论文

  • 发表日期：

    2025年6月28日

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  • Anatoly S. Kalyakin,
  • Alexander N. Volkov,
  • Anna V. Grishina,
  • Dmitry A. Medvedev

摘要

Solid-state electrochemical sensors based on yttria-stabilized zirconia (YSZ) are commonly used in various industrial applications to analyze gaseous media. One of the important industrial tasks is the determination of carbon monoxide content in various gas environments at elevated temperatures. This work describes the preparation and characterization of an amperometric solid electrolyte sensor, which is used to measure the carbon monoxide content in inert gases (nitrogen, argon, and helium) at temperatures ranging from 600 to 700 °C. The sensor exhibited a linear relationship between the limiting current as a sensor reading and carbon monoxide concentration in the gas mixtures analyzed within the range of 1 to 10 vol.% CO. The diffusion coefficients of carbon monoxide in nitrogen, helium, and argon were also assessed using the obtained limiting current values. The dynamic characteristics of the sensor used to measure carbon monoxide content were obtained and confirmed to be highly sensitive, with a fast response and reproducibility in all gas mixtures studied. Therefore, the proposed sensor construction can be utilized for CO analysis at elevated temperatures.