4.7 Article

Pd-decorated CNT as sensitive material for applications in hydrogen isotopes sensing-Application as gas sensor

期刊

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 18, 页码 11015-11024

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.12.193

关键词

Hydrogen isotopes sensor; Multiwall carbon nanotubes; Palladium; Gas detector

资金

  1. Romanian Ministry of Education and Research, CNCS UEFISCDI, within PNCDI III [PN-III-P1-1.1-PD-2019-1134, 87/2020]
  2. CORE Programme [18/N/2019, 19PFE/17.10.2018]
  3. Ministry of Research and Innovation
  4. Romanian Ministry of Education and Research, CNCS-UEFISCDI, within PNCDI III framework [PN-III-P2-2.1-PED-2019-2551, 393PED/2020]

向作者/读者索取更多资源

This study demonstrates the applicability of multiwall carbon nanotubes decorated with palladium nanoparticles as a sensitive layer in a resistive microsensor for identifying H-1 and H-2. The different adsorption behaviors of the two hydrogen isotopes on Pd-MWCNTs are well observed in the resistance change, suggesting the sensor's potential for hydrogen leakage detection integration.
Applicability of multiwall carbon nanotubes (MWCNTs) decorated with palladium nano particles as sensitive layer in a resistive microsensor for identification of hydrogen isotopes, Deuterium (H-2) and Protium (H-1), has been demonstrated. Palladium nanoparticles were anchored on the MWCNTs surface via a chemical process involving micellization, from a precursor chloride solution, in high ultrasonic density field. Pd-MWCNTs are quasi aligned between the interdigitated gold electrodes of a SiO2 substrate by drop casting and di-electrophoretic alignment in Tetrahydrofuran (THF) and Nafion solution. The morphostructural characterization of the sensitive material has been carried out through SEM, TEM and Raman spectroscopy and its gas sensing properties were evaluated using electrical measurements performed on a series of isotope concentrations (ranging from 0.1% up to 1%, and from 1% to 4%, value to which hydrogen becomes explosive) diluted in argon, to observe the evolution of the sensor sensibility. The two hydrogen isotopes have different behaviors related to the adsorption on the Pd-MWCNT, which is well observed in the resistance change. Therefore, the sensor based on Pd-MWCNTs could be a viable solution to be integrated in systems for hydrogen leakage detection. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

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