Evaluation of gas diffusion electrodes as detectors in amperometric hydrogen sensors
- Resource Type
- article
- Authors
- Lizcano-Valbuena, W. H.; Perez, J.; Paganin, V. A.; Gonzalez, E. R.
- Source
- Eclética Química. January 2005 30(2)
- Subject
- hydrogen sensors
amperometric sensors
gas diffusion electrodes
hydrogen oxidation
supported platinum
- Language
- English
- ISSN
- 0100-4670
This work is directed to the study and evaluation of gas diffusion electrodes as detectors in hydrogen sensors. Electrochemical experiments were carried out with rotating disk electrodes with a thin porous coating of the catalyst as a previous step to select useful parameters for the sensor. An experimental arrangement made in the laboratory that simulates the sensor was found appropriate to detect volumetric hydrogen percentages above 0.25% in mixtures H2:N2. The system shows a linear response for volumetric percentages of hydrogen between 0.25 and 2 %.