Investigation of Hydrogen Gas Sensing Properties of WSe2, Ag2Se, WSe2/Ag2Se Nanostructured Electrodes Synthesized by Electrochemical Methods
Fatma Bayrakçeken Ni̇şancı
TL;DR
Researchers developed a new hybrid nanostructure sensor that detects hydrogen gas efficiently at low temperatures.
Contribution
A novel WSe2/Ag2Se hybrid nanostructure was electrochemically synthesized for enhanced hydrogen sensing performance.
Findings
The hybrid electrode showed a current response of 7.89 mA cm–2 at 5000 ppm H2.
The hybrid structure demonstrated stable and reversible sensing behavior across 1000–5000 ppm H2.
SEM, Raman, and UV–Vis analyses confirmed improved surface area and electronic coupling in the hybrid structure.
Abstract
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…
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Taxonomy
TopicsGas Sensing Nanomaterials and Sensors · Electrochemical sensors and biosensors · 2D Materials and Applications