An amperometric H₂ gas sensor based on ionic liquid for hydrogen fuel cell ships

Abstract

Hydrogen fuel cell ship is an important way to realize green shipping, and the safety of hydrogen fuel ship is primary issue that shall be concerned. H2 gas sensors can provide online monitoring of H2 concentration and it is an effective mean to insure safety of hydrogen fuel. In this study, an amperometric electrochemical H2 gas sensor based on room-temperature ionic liquid was developed, which was expected to be applicable to monitoring of H2 concentration in the hydrogen fuel cell ship. A threeelectrode H2 gas sensor was fabricated by using room-temperature ionic liquid N, N, N-trimethyl-Nbutanesulfonic acid ammonium hydrogen sulfate ([TMBSA][HSO4]) as electrolyte and using platinum black as catalyst. The H2 gas sensor not only had the advantages of the conventional aqueous electrolyte sensor, such as high sensitivity, fast response, and the linear relationship between the response current and the concentration of H2, but also overcame the problem that the conventional electrochemical gas sensor cannot be applied to high humidity environment. After storage in high-humidity environment (98% RH) for three weeks, the sensor had stable performances, with current signal drift less than 2.25%. The sensor has a good potential application prospect in ships with high temperature and humidity environment.

Comprehensive Review of Fuel-Cell-Type Sensors for Gas Detection

“…Then, an electrochemical cell has a solid to permit the transportation of ions between the electrodes. , The electrochemical reactions taking place at the anode and cathode side can be written as follows: The operating conditions, such as temperature, pressure, and humidity, can influence the performance of the amperometric sensors. For example, the pressure principally affects an increase in the absolute hydrogen concentration. − Amperometric sensors presented the detection ranges of hydrogen concentrations at 5 ppm in argon and up to 100%. , As illustrated in Figure , the dimension of the pad with two layers of a membrane is 5 × 10 mm 2 . The considered thickness of the pad is 0.35 mm, as shown in Figure .…”