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DOI	10.3390/ma13204568
	Response of palladium and carbon nanotube composite films to hydrogen gas and behavior of conductive carriers
	Zou M.; Aono Y.; Inoue S.; Matsumura Y.
发表日期	2020
ISSN	19961944
起始页码	1
结束页码	10
卷号	13 期号:20
英文摘要	To develop a high-performance hydrogen gas sensor, we fabricated a composite film made of carbon nanotubes (CNTs) and palladium nanoparticles. Carbon nanotubes were spin-coated onto a glass substrate, and subsequently, palladium nanoparticles were sputtered onto this film. The response to hydrogen gas was measured during two seasons (summer and winter) using a vacuum chamber by introducing a hydrogen/argon gas mixture. There was a clear difference in the sensor response despite the temperature difference between summer and winter. In addition, since a clean chamber was used, fewer water molecules acted as a dopant, and the behavior of the CNT changed from p-type to n-type because of the dissociative adsorption of hydrogen. This phenomenon was confirmed as the Seebeck effect. Finally, the work functions of Pd, PdHx, and CNT were calculated by first-principle calculations. As predicted by previous studies, a decrease in work function due to hydrogen adsorption was confirmed; however, the electron transfer to CNT was not appropriate from the perspective of charge neutrality and was found to be localized at the Pd/CNT interface. It seems that the Seebeck effect causes the concentration of conductive carriers to change. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
英文关键词	Carbon nanotube; DFT; Hydrogen; Resistive sensors; Sensor; Thin film
scopus关键词	Carbon films; Electron transport properties; Gas adsorption; Hydrogen; Molecules; Nanocomposite films; Nanoparticles; Palladium; Photodissociation; Seebeck effect; Spin glass; Substrates; Work function; Carbon nanotube composite films; Dissociative adsorption; Electron transfer; First principle calculations; Hydrogen adsorption; Hydrogen gas sensors; Palladium nanoparticles; Temperature differences; Carbon nanotubes
来源期刊	Materials
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176587
作者单位	Department of Mechanical Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan; Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan
推荐引用方式 GB/T 7714	Zou M.,Aono Y.,Inoue S.,et al. Response of palladium and carbon nanotube composite films to hydrogen gas and behavior of conductive carriers[J],2020,13(20).
APA	Zou M.,Aono Y.,Inoue S.,&Matsumura Y..(2020).Response of palladium and carbon nanotube composite films to hydrogen gas and behavior of conductive carriers.Materials,13(20).
MLA	Zou M.,et al."Response of palladium and carbon nanotube composite films to hydrogen gas and behavior of conductive carriers".Materials 13.20(2020).