A novel hydrogen-sensitive sensor based on Pd nanorings/TNTs composite structure

Xiongbang Wei, Xiaohui Yang, Tao Wu, Shuanghong Wu, Weizhi Li, Xiaohui Wang, Zhi Chen

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Hydrogen sensors with a novel composite structure comprised of Pd nanorings distributed on TiO2 nanotube arrays were developed and tested. Effect of the TiO2 nanotube diameter size, Pd nanorings thickness on the sensors' hydrogen response characteristics were investigated. Time dependence of resistance of the Pd nanorings/TNTs composite structure on various hydrogen concentrations was also carried out and demonstrated good room temperature hydrogen sensitive characteristics. Optimized experiments demonstrated that the hydrogen sensor composed of 25 nm-thickness Pd nanorings distributed on the 77 nm-diameter size TiO2 nanotube showed a fast response time (3.8 s) and high sensitivity (92.05%) at 0.8 vol% H2. A hydrogen sensitive characteristics model is proposed and the Pd nanorings' important role in the hydrogen sensitive mechanisms is described. The hydrogen sensor's excellent hydrogen sensitive characteristics is ascribed to the Pd nanorings' quick and continual formation and breakage of multiple passages due to absorption and desorption of hydrogen atoms.

Original languageEnglish
Pages (from-to)24580-24586
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number38
DOIs
StatePublished - 2017

Bibliographical note

Publisher Copyright:
© 2017 Hydrogen Energy Publications LLC

Keywords

  • Composite structure
  • Hydrogen sensor
  • Pd nanorings
  • TiO nanotube arrays

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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