Development of Electrochemical CO Gas Sensor Using Expanded Polytetrafluoroethylene Membrane Modified by Ion Implantation

Development of advanced gas-sensing devices based on the microstructural and compositional controls of various promising materials and their different operating mechanism

“…Most of electrochemical gas sensors operable at RT have been utilized highly ionic-conductive liquid elec- trolytes 109) or proton-conducting polymers such as Nafion μ , 110) On the other hand, anion-conducting polymers (ACP) with large hydroxide ion (OH ¹ ) conductivity and improved long-term stability have been also gained attention as an electrolyte for electrochemical power devices such as polymer-electrolyte fuel cells, because it was operated under large current density as well as high power density with relatively-low overpotential. 111) We have recently focused on various kinds of metal oxides as a COsensing electrode material for the electrochemical gas sensors using the ACP electrolyte.…”

Effects of Pt loading onto SnO2 electrodes on CO-sensing properties and mechanism of potentiometric gas sensors utilizing an anion-conducting polymer electrolyte

“…Some kinds of electrochemical gas sensors operable at room temperature (RT) have been utilized to various application fields such as gas-leak detectors, alcohol and breath-odor checkers, oxygen and toxicgas (e.g., hydrogen sulfide, ammonia, CO) monitors, and so on. Most of these sensors have generally used highly ionic-conductive liquid electrolytes such as sulfonic acid aqueous solutions [1][2][3][4], but they have some problems on the operation stability due to vaporization of the liquid electrolytes and a decrease in the reaction sites (i.e., three-phase boundaries) in the electrodes during long-term use. Therefore, some inorganic solid electrolytes such as lanthanum fluoride [5], antimonic acid [6], and ion liquids [7,8] have been ever studied as an alternative electrolyte for the gas sensors operable at RT.…”

Room-temperature CO Thermoelectric Gas Sensor based on Au/Co3O4Catalyst Tablet

“…Towork in anindoor environment, the CO sensor musthave asimple structure, low operating temperature, good selectivity, long-term stability, and fast response. Currently, both electrochemical type [4,5] and semi-conductor type [6,7] CO sensors are commonly commercialized; however, they stilllack selectivity, stability, and configurability.…”