Platinum-Nickel alloy thin films for low concentration hydrogen sensor application

KILINÇ N., SANDUVAÇ S., Erkovan M.

JOURNAL OF ALLOYS AND COMPOUNDS, cilt.892, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 892
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.jallcom.2021.162237
  • Dergi Adı: JOURNAL OF ALLOYS AND COMPOUNDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Public Affairs Index, Civil Engineering Abstracts
  • Anahtar Kelimeler: Platinum, Nickel, Alloy, Thin film, Hydrogen sensor, Resistive sensor, Co-sputtering, ELECTRICAL-RESISTIVITY, OXYGEN REDUCTION, SURFACE, TEMPERATURE, PT(111), AIR
  • Kayseri Üniversitesi Adresli: Evet

Özet

Hydrogen (H-2) gas sensing properties of platinum (Pt) -nickel (Ni) alloy thin films deposited on a glass substrate by sputter technique are investigated depending on alloy composition, temperature and H-2 concentration. The structural properties of Pt-Ni alloy thin films are characterized by XRD, SEM and EDS techniques. The amount of Ni atom in the alloy thin films is increased from 0% up to 60% and the H-2 sensing properties of the alloy thin film sensors are examined in the concentration range of 25-1000 ppm H-2. The results revealed that the H-2 sensing mechanism of the same thickness pure Pt and Pt-Ni alloy thin films could be explained with surface scattering phenomenon, and the Pt-79-Ni-21 alloy thin film exhibited the best sensing performance to H-2 at all measured temperature ranges. The limit of detection for Pt and Pt-Ni alloy thin films is calculated as lower than 1 ppm, and the response times of the films are decreased with rising H-2 concentration and temperature. (C) 2021 Elsevier B.V. All rights reserved.