Selective adsorption of H2 on N-doped ZnO nano-ribbons: First-principle analysis

Wael Othman, Alaa Shaheen, Younes Aitladi, Sultan Atatri, Yahya Abdelhadi, Golibjon Berdiyorov Qeeri, Nacir Tit

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    2 Scopus citations

    Abstract

    Adsorption and gas-sensing properties of ZnO nano-ribbons (ZnO-NRs) in detecting H2 are investigated using density functional theory (DFT) combined with the non-equilibrium Green's function (NEGF) formalism. Several dopants (e.g., C, N and F) have been tested versus adsorption of H2 molecule and other gas molecules (e.g., N2, O2, H2O, H2S). The results of relaxation show the occurrence of chemisorption to occur only in cases of C- and N-doped samples. Selective chemisorption of H2 and O2 molecules are observed on N-doped ZnO-NRs. The chemisorption of O2 is associated with the breaking of just one π-bond. Whereas, the chemisorption of H2 is associated with a complete dissociation and a formation of donor states in the gap (i.e., it yields n-type doping) and has the ability to enhance the conductivity. These characteristics made N-doped ZnO-NRs suitable for high sensitivity and selectivity towards the detection of H2 gas. Furthermore, the calculated IV-curves have paved the way for estimating the sensitivity and consolidated our results. Since the change of conductance is one of the main outputs of sensors, our findings will be useful in developing ZnO-based devices for hydrogen storage and detection.

    Original languageBritish English
    Title of host publication5th International Conference on Renewable Energy
    Subtitle of host publicationGeneration and Application, ICREGA 2018
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages227-231
    Number of pages5
    ISBN (Electronic)9781538622513
    DOIs
    StatePublished - 12 Apr 2018
    Event5th International Conference on Renewable Energy: Generation and Application, ICREGA 2018 - Al Ain, United Arab Emirates
    Duration: 26 Feb 201828 Feb 2018

    Publication series

    Name5th International Conference on Renewable Energy: Generation and Application, ICREGA 2018
    Volume2018-January

    Conference

    Conference5th International Conference on Renewable Energy: Generation and Application, ICREGA 2018
    Country/TerritoryUnited Arab Emirates
    CityAl Ain
    Period26/02/1828/02/18

    Keywords

    • Chemisorption
    • Gas storage and detection
    • Gas-sensing
    • Green-energy production
    • Hydrogen production

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