R. Bouchet et al., ACID-DOPED POLYBENZIMIDAZOLE AS THE MEMBRANE OF ELECTROCHEMICAL HYDROGEN SENSORS, Journal of the Electrochemical Society, 144(5), 1997, pp. 95-97
Aprotonic polymer electrolyte based on polybenzimidazole is proposed f
or use in a hydrogen sensor, operating at room temperature, in air. Th
e potentiometric response in inert gas containing hydrogen obeys the N
ernst equation. In air, the EMF is a mixed potential which results fro
m the hydrogen oxidation and the oxygen reduction. The response time i
s of the order of 30 s whatever the hydrogen concentration step within
the hydrogen partial pressure range from 10(-3) to 1 atm.