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S&M3437 Letter https://doi.org/10.18494/SAM4621 Published: November 8, 2023 Effects of Flameless Catalytic Combustion of Hydrogen on the Parameters of Catalytic Sensors with Platinum-group Catalysts [PDF] Alexander Baranov, Ivan Ivanov, and Elena Karpova (Received August 23, 2023; Accepted October 16, 2023) Keywords: catalytic hydrogen sensor, platinum-group catalysts, sensitivity, catalytic hydrogen combustion, self-initiation temperature of reaction, resistance and temperature of sensing element
The response of catalytic hydrogen sensors with platinum-group catalysts (Pt + 3Pd, Pt, Pd, Ir, and Rh) in the room temperature range has been studied. It was demonstrated that a flameless catalytic hydrogen combustion reaction on the Pt and Pt + 3Pd catalysts occurs at 20 ℃, which results in the heating of the sensing element of a catalytic sensor, and the microheater resistance increases. The microheater temperature was first measured, and it was shown that the temperature increases by 99 and 83 ℃ in the calibration gas mixture containing 0.96% vol. hydrogen for the Pt and Pt + 3Pd catalysts, respectively. A method has been provided for measuring hydrogen levels using a catalytic sensor without heating voltage input.
Corresponding author: Ivan IvanovThis work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Alexander Baranov, Ivan Ivanov, and Elena Karpova, Effects of Flameless Catalytic Combustion of Hydrogen on the Parameters of Catalytic Sensors with Platinum-group Catalysts, Sens. Mater., Vol. 35, No. 11, 2023, p. 3585-3594. |