論文

査読有り
2020年5月

Understanding the Detection Mechanisms and Ability of Molecular Hydrogen on Three-Dimensional Bicontinuous Nanoporous Reduced Graphene Oxide

Materials
  • Ito, Yoshikazu
  • ,
  • Kayanuma, Megumi
  • ,
  • Shigeta, Yasuteru
  • ,
  • Fujita, Jun-ichi
  • ,
  • Tanabe, Yoichi

13
10
開始ページ
2259
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.3390/ma13102259
出版者・発行元
MDPI

Environmental safety has become increasingly important with respect to hydrogen use in society. Monitoring techniques for explosive gaseous hydrogen are essential to ensure safety in sustainable hydrogen utilization. Here, we reveal molecular hydrogen detection mechanisms with monolithic three-dimensional nanoporous reduced graphene oxide under gaseous hydrogen flow and at room temperature. Nanoporous reduced graphene oxide significantly increased molecular hydrogen physisorption without the need to employ catalytic metals or heating. This can be explained by the significantly increased surface area in comparison to two-dimensional graphene sheets and conventional reduced graphene oxide flakes. Using this large surface area, molecular hydrogen adsorption behaviors were accurately observed. In particular, we found that the electrical resistance firstly decreased and then gradually increased with higher gaseous hydrogen concentrations. The resistance decrease was due to charge transfer from the molecular hydrogen to the reduced graphene oxide at adsorbed molecular hydrogen concentrations lower than 2.8 ppm; conversely, the resistance increase was a result of Coulomb scattering effect

リンク情報
DOI
https://doi.org/10.3390/ma13102259
ID情報
  • DOI : 10.3390/ma13102259
  • ISSN : 1996-1944

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