Design of hydrogen sensor relying on Pd-MWCNT/WO3 sensing materials for selective and rapid hydrogen detection

被引：3
作者：
Wang, Xuhan [1 ]
Zhu, Yao [1 ]
Gao, Wei [1 ]
机构：
[1] Dalian Univ Technol, Dept Chem Machinery & Safety Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2025年 / 422卷
关键词：
Pd-MWCNT/WO3 sensing materials; Hydrogen sensor; Selectivity; Rapid detection; Sensing mechanism; METAL-OXIDE; CARBON NANOTUBES; GAS; FILMS; PD;
D O I：
10.1016/j.snb.2024.136648
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this investigation, hydrogen sensors were designed based on multi-walled carbon nanotubes (MWCNT) and Pd loaded on WO3 nanosheets by means of hydrothermal synthesis and impregnation reduction. First, WO3 with different morphologies were synthesized, including zero dimension (0D) nanoparticles, one dimension (1D) nanowires and two dimension (2D) nanosheets. After testing, the 2D-WO3 material was selected as the substrate material to form final Pd-MWCNT/WO3 composites. Outstandingly, Pd-MWCNT/WO3 sensor exhibited greatest sensitivity with high response value (371.13), fast response/recovery time (1/4 s) to 1000 ppm hydrogen at 175 degrees C, excellent selectivity and reproducibility. Furthermore, the corresponding hydrogen sensing mechanism was proposed combining with DFT calculation of hydrogen adsorption energy. This was the first report on designing a novel ternary Pd-MWCNT/WO3 composites sensor applied to hydrogen detection and the first time to calculate the hydrogen adsorption energy of Pd-MWCNT/WO3.
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页数：13
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