Preparation of palladium-doped mesoporous WO3 for hydrogen gas sensors
Preparation of palladium-doped mesoporous WO3 for hydrogen gas sensors
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DOI：
10.1016/j.jallcom.2018.10.372
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发表时间：
2019-03
影响因子：
6.2
通讯作者：
Chun-Han Wu;Zhen Zhu;Shunnan Huang;R. Wu
中科院分区：
文献类型：
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作者：
Chun-Han Wu;Zhen Zhu;Shunnan Huang;R. Wu
本研究提出了一种使用负载钯介孔WO3(Pd/M-WO3)作为传感材料的氢气传感器。采用硬模板法合成了Pd/M-WO3。通过 X 射线衍射、透射电子显微镜、能谱分析和 Brunner-Emmet-Teller 模型对 Pd/M-WO3 的表面形貌、微观结构和成分进行了表征。将商业 WO3 粉末和合成介孔 WO3(M-WO3) 的传感响应与使用 Pd/M-WO3 作为氢传感器传感材料的传感响应进行了比较。 Pd/M-WO3表现出最高的氢传感能力。 WO3、M-WO3和Pd/M-WO3在室温下的氢传感性能比较表明，M-WO3的传感性能优于商业WO3粉体，但M-WO3中Pd的掺杂可以有效提高传感效率（从1.07到11.78）。 Pd/M-WO3基气体传感器表现出有前景的氢气传感特性，例如响应速度快、检测选择性高、重现性好、恢复时间极短（10s）。因此，该传感器是高性能氢气传感应用的理想选择。
This study presents a hydrogen gas sensor using Pd-loaded mesoporous WO3(Pd/M-WO3) as the sensing material. Pd/M-WO3was synthesized through the hard-template method. The surface morphology, microstructure, and composition of Pd/M-WO3were characterized through X-ray diffraction, transmission electron microscopy, energy-dispersive spectrometry, and the Brunner–Emmet–Teller model. Sensing responses using commercial WO3powder and synthetic mesoporous WO3(M-WO3) were compared with that using Pd/M-WO3as the sensing materials for hydrogen sensors. Pd/M-WO3exhibited the highest hydrogen sensing ability. Comparison of hydrogen sensing performances of WO3, M-WO3, and Pd/M-WO3at room temperature showed that the sensing performance of M-WO3is superior to that of commercial WO3powder, but doping of M-WO3with Pd can effectively improve the sensing efficiency (from 1.07 to 11.78). The Pd/M-WO3-based gas sensor exhibits promising hydrogen gas sensing characteristics, such as fast response, highly selective detection, good reproducibility, and extremely short recovery time (10 s). Therefore, this sensor is an ideal candidate for application in high-performance hydrogen gas sensing.