Investigation of Hydrogen Gas Sensing Properties of WSe<sub>2</sub>, Ag<sub>2</sub>Se, WSe<sub>2</sub>/Ag<sub>2</sub>Se Nanostructured Electrodes Synthesized by Electrochemical Methods

Bayrakçeken Nişancı F.

ACS OMEGA, 2026 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1021/acsomega.5c11524
  • Dergi Adı: ACS OMEGA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Directory of Open Access Journals
  • Atatürk Üniversitesi Adresli: Evet

Özet

In this study, WSe2, Ag2Se, and WSe2/Ag2Se nanostructured electrodes were synthesized via an electrochemical deposition method, and their hydrogen gas sensing performances were systematically investigated. The synergistic interaction between WSe2 nanosheets and Ag2Se nanoparticles significantly enhanced charge transport and catalytic activity in the hybrid electrode. Compared to the pristine WSe2 and Ag2Se electrodes, the hybrid electrode exhibited a remarkably higher current response of 7.89 mA cm-2 at 5000 ppm of H2 and demonstrated stable and reversible sensing behavior over a wide range of hydrogen concentrations (1000-5000 ppm). Analyses of SEM, Raman, and UV-Vis data revealed an increased surface area and improved electronic coupling within the hybrid structure. Furthermore, EIS and OCP measurements confirmed accelerated interfacial charge transfer and superior electrochemical stability. Overall, this study introduces a novel electrochemically synthesized WSe2/Ag2Se hybrid nanostructure exhibiting excellent sensing performance at low temperatures (25-150 degrees C) and provides a promising strategy for the development of low-power, highly stable hydrogen gas sensors.