Carbon nanotube-based hydrogen gas sensor electrochemically functionalized with palladium

Junya Suehiro, Shinji Yamane, Kiminobu Imasaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

Palladium (Pd) has been widely employed for conventional hydrogen sensors due to the catalytic nature. Pd has been incorporated also with carbon nanotube (CNT) gas sensors for hydrogen sensing. In this study, a liquid-phase electrochemical reaction was proposed to realize a simple and inexpensive fabrication method of a Pd-functionalized CNT hydrogen sensor. The single-walled CNTs were trapped onto a microelectrode under positive dielectrophoresis. The CNT-retaining microelectrode was immersed in a palladium acetate solution together with a graphite rod. DC voltage was applied between the microelectrode (cathode) and the graphite rod (anode) so that palladium acetate could be reduced and catalytic Pd could be electrodeposited on the CNT surface. The CNT sensor could reversibly respond to hydrogen gas in the air in the range of 0.01 % -1 % concentration at room temperature. It was also demonstrated that the Pdfunctionalized CNT gas sensor could be fabricated just by dipping the CNT-retaining microelectrode into an aqueous Pd salt solution without applying DC voltage (electroless redox reaction).

Original languageEnglish
Title of host publicationThe 6th IEEE Conference on SENSORS, IEEE SENSORS 2007
Pages554-557
Number of pages4
DOIs
Publication statusPublished - Dec 1 2007
Event6th IEEE Conference on SENSORS, IEEE SENSORS 2007 - Atlanta, GA, United States
Duration: Oct 28 2007Oct 31 2007

Publication series

NameProceedings of IEEE Sensors

Other

Other6th IEEE Conference on SENSORS, IEEE SENSORS 2007
CountryUnited States
CityAtlanta, GA
Period10/28/0710/31/07

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Carbon nanotube-based hydrogen gas sensor electrochemically functionalized with palladium'. Together they form a unique fingerprint.

  • Cite this

    Suehiro, J., Yamane, S., & Imasaka, K. (2007). Carbon nanotube-based hydrogen gas sensor electrochemically functionalized with palladium. In The 6th IEEE Conference on SENSORS, IEEE SENSORS 2007 (pp. 554-557). [4388458] (Proceedings of IEEE Sensors). https://doi.org/10.1109/ICSENS.2007.4388458