Enhanced hydrogen sensing properties of Pd-coated SnO2 nanorod arrays in nitrogen and transformer oil

Min Hyung Kim; Byungjin Jang; Wonkyung Kim; Wooyoung Lee

doi:10.1016/j.snb.2018.12.063

Enhanced hydrogen sensing properties of Pd-coated SnO₂ nanorod arrays in nitrogen and transformer oil

Min Hyung Kim, Byungjin Jang, Wonkyung Kim, Wooyoung Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

We report enhanced sensing properties of Pd-coated SnO₂ nanorod (NR) arrays for detecting H₂ gas in N₂ and dissolved in transformer oil. The Pd nanoparticles were coated on randomly ordered vertical SnO₂ NR arrays by the glancing angle deposition (GLAD) method, which utilizes an electron-beam evaporator and a DC magnetron sputtering system. The Pd-coated SnO₂ NR arrays exhibited high response (104 at 1% H₂) in N₂. Pd-coated SnO₂ NR arrays were immersed and in mineral oil that contains various concentrations of dissolved H₂ and the electrical response was measured. We found that the Pd-coated SnO₂ NR arrays showed superior response (R = ˜96), low detection limit (0.3 ppm), and fast response times (300 s). The Pd-coated SnO₂ NR arrays had a temperature coefficient of resistance (TCR) of 3.69 × 10-3 °C⁻¹ at various oil temperatures (20–80 °C), indicating good thermal stability at high temperatures. The sensing mechanism of the Pd-coated SnO₂ NR arrays was also demonstrated by using changes in the Schottky barrier height at the Pd/SnO₂ interface upon exposure to H₂.

Original language	English
Pages (from-to)	890-896
Number of pages	7
Journal	Sensors and Actuators, B: Chemical
Volume	283
DOIs	https://doi.org/10.1016/j.snb.2018.12.063
Publication status	Published - 2019 Mar 15

Bibliographical note

Funding Information:
This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), and it was funded by the Ministry of Science, ICT & Future Planning (NFR-2017M3A9F1052297) and the Medium and Large Complex Technology Commercialization Project through the Commercializations Promotion Agency for R&D Outcomes funded by the Ministry of Science and ICT.

Publisher Copyright:
© 2018

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1016/j.snb.2018.12.063

Cite this

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title = "Enhanced hydrogen sensing properties of Pd-coated SnO2 nanorod arrays in nitrogen and transformer oil",

abstract = "We report enhanced sensing properties of Pd-coated SnO2 nanorod (NR) arrays for detecting H2 gas in N2 and dissolved in transformer oil. The Pd nanoparticles were coated on randomly ordered vertical SnO2 NR arrays by the glancing angle deposition (GLAD) method, which utilizes an electron-beam evaporator and a DC magnetron sputtering system. The Pd-coated SnO2 NR arrays exhibited high response (104 at 1% H2) in N2. Pd-coated SnO2 NR arrays were immersed and in mineral oil that contains various concentrations of dissolved H2 and the electrical response was measured. We found that the Pd-coated SnO2 NR arrays showed superior response (R = ˜96), low detection limit (0.3 ppm), and fast response times (300 s). The Pd-coated SnO2 NR arrays had a temperature coefficient of resistance (TCR) of 3.69 × 10-3 °C−1 at various oil temperatures (20–80 °C), indicating good thermal stability at high temperatures. The sensing mechanism of the Pd-coated SnO2 NR arrays was also demonstrated by using changes in the Schottky barrier height at the Pd/SnO2 interface upon exposure to H2.",

author = "Kim, {Min Hyung} and Byungjin Jang and Wonkyung Kim and Wooyoung Lee",

note = "Funding Information: This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), and it was funded by the Ministry of Science, ICT & Future Planning (NFR-2017M3A9F1052297) and the Medium and Large Complex Technology Commercialization Project through the Commercializations Promotion Agency for R&D Outcomes funded by the Ministry of Science and ICT. Publisher Copyright: {\textcopyright} 2018",

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N1 - Funding Information: This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), and it was funded by the Ministry of Science, ICT & Future Planning (NFR-2017M3A9F1052297) and the Medium and Large Complex Technology Commercialization Project through the Commercializations Promotion Agency for R&D Outcomes funded by the Ministry of Science and ICT. Publisher Copyright: © 2018

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N2 - We report enhanced sensing properties of Pd-coated SnO2 nanorod (NR) arrays for detecting H2 gas in N2 and dissolved in transformer oil. The Pd nanoparticles were coated on randomly ordered vertical SnO2 NR arrays by the glancing angle deposition (GLAD) method, which utilizes an electron-beam evaporator and a DC magnetron sputtering system. The Pd-coated SnO2 NR arrays exhibited high response (104 at 1% H2) in N2. Pd-coated SnO2 NR arrays were immersed and in mineral oil that contains various concentrations of dissolved H2 and the electrical response was measured. We found that the Pd-coated SnO2 NR arrays showed superior response (R = ˜96), low detection limit (0.3 ppm), and fast response times (300 s). The Pd-coated SnO2 NR arrays had a temperature coefficient of resistance (TCR) of 3.69 × 10-3 °C−1 at various oil temperatures (20–80 °C), indicating good thermal stability at high temperatures. The sensing mechanism of the Pd-coated SnO2 NR arrays was also demonstrated by using changes in the Schottky barrier height at the Pd/SnO2 interface upon exposure to H2.

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