Highly sensitive hydrogen sensing properties of Pt-Pd alloy thin films on a flexible substrate

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dc.contributor.authorKilinc, Necmettin
dc.date.accessioned2026-04-04T13:33:31Z
dc.date.available2026-04-04T13:33:31Z
dc.date.issued2025
dc.departmentİnönü Üniversitesi
dc.description.abstractIn the present study, the thin films of platinum-palladium (Pt-Pd) alloy with various compositions are prepared on a flexible polyamide substrate by using the magnetron co-sputtering technique. The atomic Pd content in the alloy was varied from 25% to 63% and the Pt-Pd alloy film thickness was approximately 2 nm. The Pt-Pd alloy thin films were tested in a wide range of hydrogen concentrations from 10 ppm to 4% hydrogen at various temperatures between room temperature to 200 degrees C. The hydrogen sensing mechanism of Pt-Pd alloy thin films is dominated by Pt atoms in the alloy and could be explained by surface scattering. The highest sensor response ( triangle R/RH ) is received as about 8.1% for Pt50Pd50 alloy thin films during exposure to 1000 ppm hydrogen at 50 degrees C. The sensor response and the response time of all Pt-Pd alloy thin films decreased with rising temperature in the measurement temperature range. Another result of this study is that Pt-Pd alloy thin film sensors require oxygen in the working environment to achieve both high sensor response and full recovery. As a summary, Pt-Pd alloy thin film sensors show high sensitivity, hysteresis free, low temperature operation and selective to hydrogen.
dc.description.sponsorshipInonu University; Scientific and Technological Research Council of Turkey (TUBITAK) [121M681]; [FCD-2023-3358]
dc.description.sponsorshipThis study was partially supported by Inonu University with a project number of FCD-2023-3358 and the Scientific and Technological Research Council of Turkey (TUBITAK) with a project number of 121M681.
dc.identifier.doi10.1088/2632-959X/ade81d
dc.identifier.issn2632-959X
dc.identifier.issue3
dc.identifier.orcid0000-0003-2123-2938
dc.identifier.scopus2-s2.0-105010152606
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1088/2632-959X/ade81d
dc.identifier.urihttps://hdl.handle.net/11616/109207
dc.identifier.volume6
dc.identifier.wosWOS:001521835700001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorKilinc, Necmettin
dc.language.isoen
dc.publisherIop Publishing Ltd
dc.relation.ispartofNano Express
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250329
dc.subjectplatinum
dc.subjectpalladium
dc.subjectco-sputtering
dc.subjectPt-Pd alloy thin film
dc.subjectresistive sensor
dc.subjectflexible sensor
dc.subjecthydrogen sensor
dc.titleHighly sensitive hydrogen sensing properties of Pt-Pd alloy thin films on a flexible substrate
dc.typeArticle

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