Hydrogen-Sensing Properties of Ultrathin Pt-Co Alloy Films

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dc.authoridKILINC, Necmettin/0000-0003-2123-2938
dc.authoridCardoso, Susana/0000-0001-6913-6529
dc.authoridDeger, Caner/0000-0002-8472-1651
dc.authoriderkovan, mustafa/0000-0002-4527-2056
dc.authorwosidKILINC, Necmettin/AAT-9845-2020
dc.authorwosidDeger, Caner/GYU-7630-2022
dc.authorwosidCardoso, Susana/B-6199-2013
dc.contributor.authorErkovan, Mustafa
dc.contributor.authorDeger, Caner
dc.contributor.authorCardoso, Susana
dc.contributor.authorKilinc, Necmettin
dc.date.accessioned2024-08-04T20:53:17Z
dc.date.available2024-08-04T20:53:17Z
dc.date.issued2022
dc.departmentİnönü Üniversitesien_US
dc.description.abstractThe present work aims to investigate the feasibility of utilizing Pt and PtCo alloy ultrathin films as hydrogen gas sensors in order to reduce the cost of the hydrogen gas sensors by using low-cost metallic materials. In this study, ultrathin Pt and PtCo alloy thin films are evaluated for hydrogen sensors. The stoichiometry and structural characterization of the thin films are observed from XPS, SEM, and EDX measurements. The 2-nm-thick Pt and PtCo films deposited by sputtering onto Si/SiO2 covers homogeneously the surface in an fcc crystalline plane (111). The hydrogen gas-sensing properties of the films are assessed from the resistance measurement between 25 degrees C and 150 degrees C temperature range, under atmospheres with hydrogen concentration ranging from 10 ppm to 5%. The hydrogen-sensing mechanism of ultrathin PtxCo1-x alloy films can be elucidated with the surface scattering phenomenon. PtCo thin alloy films show better response time than pure Pt thin films, but the alloy films show lower sensor response than pure Pt film's sensor response. Aside from these experimental investigations, first-principles calculations have also been carried out for bare Pt and Co, and also PtCo alloys. Compared to the theoretical calculations, the sensor response to change decreases with increasing Co content, a result that is compatible with the experimental results. In an attempt to explain the decrease in the sensor response of PtCo alloy films compared to bare Pt film, a variety of different phenomena are discussed, including the shrinking lattice of the structure or dendritic surface structure of PtCo alloy films by the increasing cobalt ratio.en_US
dc.description.sponsorshipTUBITAK [121M681]; Fundacao para a Ciencia e a Tecnologia [UID/05367/2020]en_US
dc.description.sponsorshipThis study was supported by the research fund of TUBITAK with project number: 121M681. The authors also wish to acknowledge the Fundacao para a Ciencia e a Tecnologia for funding of the Research Unit INESC MN (UID/05367/2020) through pluriannual BASE and PROGRAMATICO financing.en_US
dc.identifier.doi10.3390/chemosensors10120512
dc.identifier.issn2227-9040
dc.identifier.issue12en_US
dc.identifier.scopus2-s2.0-85144995449en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.3390/chemosensors10120512
dc.identifier.urihttps://hdl.handle.net/11616/101084
dc.identifier.volume10en_US
dc.identifier.wosWOS:000902337900001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherMdpien_US
dc.relation.ispartofChemosensorsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectgas sensoren_US
dc.subjectplatinumen_US
dc.subjectplatinum-cobalt alloysen_US
dc.subjectthin filmsen_US
dc.subjecthydrogen sensoren_US
dc.titleHydrogen-Sensing Properties of Ultrathin Pt-Co Alloy Filmsen_US
dc.typeArticleen_US

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