Room-temperature optical detection of hydrogen gas using palladium nano-islands

Palladium thin films of different thicknesses have been processed by oxidation and subsequent reduction in hydrogen atmosphere. Hydrogen optical sensing properties of as-deposited (Pd) and processed (r-Pd) samples have been experimentally tested with a H2 concentration of 5% and 1%, discovering that...

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Bibliographic Details
Published inInternational journal of hydrogen energy Vol. 43; no. 11; pp. 5783 - 5792
Main Authors Corso, Alain J., Tessarolo, Enrico, Guidolin, Martino, Della Gaspera, Enrico, Martucci, Alessandro, Angiola, Marco, Donazzan, Alberto, Pelizzo, Maria G.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 15.03.2018
Subjects
Hydrogen detection
Optical sensor
Palladium
Palladium oxide
Hydrogen detection
Optical sensor
Palladium oxide
Palladium
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Summary:Palladium thin films of different thicknesses have been processed by oxidation and subsequent reduction in hydrogen atmosphere. Hydrogen optical sensing properties of as-deposited (Pd) and processed (r-Pd) samples have been experimentally tested with a H2 concentration of 5% and 1%, discovering that the reduced films show improved performances in term of response/recovery time. As reveled by SEM images, the oxidation/reduction process modifies the surface appearance, which assumes a nano-islands structured morphology. The porosity of the processed films may explain the reduction of the response/recovery time, while the larger effective sensing surface in thinner samples justifies the responsivity performances. •Pd nano-islands structured films were obtained using a thermal and H2-reduction process.•The structural and optical proprieties of nano-islands structured films were investigated.•High response/recovery speed at room temperature obtained in hydrogen sensing.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2018.01.183