Palladium Nanoparticles Film Based Concentration Specific Hydrogen Sensor

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Abstract:

H2 sensing behaviour of Palladium nanoparticles (PdNPs) mixed with nafion has been demonstrated as a function of H2 concentration. PdNPs (15 nm diameter) were mixed with nafion (5% solution) and cast over interdigitated micro-electrodes (IDE). Measurements were carried out at room temperature and change in resistance of the PdNP-nafion film upon exposure to hydrogen was recorded. Pd thin film sensors were used as control. Resistance response studies reveal a unique concentration specific response, exhibiting a pulsed effect (above 1.5%) and a saturated response (upto 1.5%), for films cast with solution strength of 2.5 mg PdNPs in 10 μl nafion. The characteristic change in the sensing behaviour can be used to develop a sensor to determine the H2 concentration level with high sensitivity and fast response.

Keywords: HYDROGEN SENSOR; INTERDIGITATED MICRO ELECTRODES; NAFION; PALLADIUM NANOPARTICLES

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/sl.2012.2315

Publication date: January 1, 2012

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