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Updated: Sep 13, 2026
A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
Published on: August 17, 2016
High-Performance Hydrogen Sensor Fabricated by Layer-by-Layer Self-Assembly for Real-Time Monitoring of Hydrogen
Lan Meng1, Rende Zhao1, Wenjing Pan2
1College of New Energy, China University of Petroleum (East China), Qingdao 266580, China.
Abstract:
In this study, ZnO/Co3O4 composite thin-film room-temperature hydrogen (H2) sensors were prepared via the hydrothermal method and self-assembly techniques. The test results show that the composite sensor with a layer assembly ratio of 1:1 has good sensing performance for H2. The ZnO/Co3O4 composite sensor can detect a wide range of H2 concentrations from 100 to 50,000 ppm, and the response toward 300 ppm H2 is more than six-times that of a single nanomaterial. In addition, it has a faster response recovery speed, better repeatability, selectivity and long-term stability. The improvement in composite sensor performance results from the synergistic effect between ZnO and Co3O4 materials and the formation of heterostructures. The prepared ZnO/Co3O4 composite thin-film sensor was successfully applied to detect the H2 production concentration and behavior of an electrolytic cell for hydrogen production by water electrolysis.
