Carbon nanotube-based hydrogen gas sensor electrochemically functionalized with palladium

Junya Suehiro, Shinji Yamane, Kiminobu Imasaka

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

12 被引用数 (Scopus)

抄録

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).

本文言語英語
ホスト出版物のタイトルThe 6th IEEE Conference on SENSORS, IEEE SENSORS 2007
ページ554-557
ページ数4
DOI
出版ステータス出版済み - 12月 1 2007
イベント6th IEEE Conference on SENSORS, IEEE SENSORS 2007 - Atlanta, GA, 米国
継続期間: 10月 28 200710月 31 2007

出版物シリーズ

名前Proceedings of IEEE Sensors

その他

その他6th IEEE Conference on SENSORS, IEEE SENSORS 2007
国/地域米国
CityAtlanta, GA
Period10/28/0710/31/07

!!!All Science Journal Classification (ASJC) codes

  • 電子工学および電気工学

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