Investigation of MoS2 Nanosheet-Coated ZnO Thin Films for Hydrogen Gas Sensing Applications and the Effect of Temperature on the Enhanced Sensor Response

Sandeep Reddy Gottam, Chi Ting Tsai, Cheng Ying Li, Sheng Yuan Chu

Research output: Contribution to journalArticle

Abstract

Hydrogen is considered to be the subsequent energy source derived from hydrogen evolution reactions. To ensure safety when using this harmful gas, hydrogen gas sensors with fast response and recovery rates, high sensor responses and stability are crucial. There is a need for alternative catalysts to reduce the use of expensive catalysts. A high surface to volume ratio with complete adsorption and desorption of ions makes molybdenum disulfide (MoS2) a promising catalyst in hydrogen gas sensors. A sensor with a zinc oxide (ZnO) active layer and an MoS2 nanosheet (NS) catalyst bridged between the patterned silver (Ag) electrodes was fabricated. The experimental results were comparatively very good in two ways: 1) The sensor response was high, 2) the response rate for 100 ppm H2 gas was 7 s, and the recovery rate was 23 s at 250 °C with extremely high error-free repeatability. The stability of the device was noteworthy. This cost-effective, high-performance device structure can be used as a practical industrial sensor.

Original languageEnglish
Article number087507
JournalJournal of the Electrochemical Society
Volume167
Issue number8
DOIs
Publication statusPublished - 2020 Jan 5

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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