Promotion effect of proton-conducting oxide BaZr0. 1Ce0. 7Y0. 2O3− δ on the catalytic activity of Ni towards ammonia synthesis from hydrogen and nitrogen

John Humphreys, Rong Lan, Dongwei Du, Wei Xu, Shanwen Tao

    Research output: Contribution to journalArticlepeer-review

    18 Citations (Scopus)
    42 Downloads (Pure)

    Abstract

    In this report, for the first time, it has been observed that proton-conducting oxide BaZr0.1Ce0.7Y0.2O3−δ (BZCY) has significant promotion effect on the catalytic activity of Ni towards ammonia synthesis from hydrogen and nitrogen. Renewable hydrogen can be used for ammonia synthesis to save CO2 emission. By investigating the operating parameters of the reaction the optimal conditions for this catalyst were identified. It was found that at 620 °C with a total flow rate of 200 mL min−1 and a H2/N2 mol ratio of 3, an activity of approximately 250 μmol g−1 h−1 can be achieved. This is ten times larger than that for the unpromoted Ni catalyst under the same conditions although the stability of both catalysts in the presence of steam was not good. The specific activity of Ni supported on proton-conducting oxide BZCY is approximately 72 times higher than that of Ni supported on non-proton conductor MgOCeO2.
    Original languageEnglish
    Pages (from-to)17726-17736
    Number of pages11
    JournalInternational Journal of Hydrogen Energy
    Volume43
    Issue number37
    Early online date23 Aug 2018
    DOIs
    Publication statusPublished - 13 Sep 2018

    Bibliographical note

    Copyright © and Moral Rights are retained by the author(s) and/ or other
    copyright owners. A copy can be downloaded for personal non-commercial
    research or study, without prior permission or charge. This item cannot be
    reproduced or quoted extensively from without first obtaining permission in
    writing from the copyright holder(s). The content must not be changed in any way
    or sold commercially in any format or medium without the formal permission of
    the copyright holders.

    Keywords

    • Renewable hydrogen
    • Ammonia synthesis
    • Catalysis
    • Proton conductor
    • Nickel catalyst
    • Catalyst promoter

    Fingerprint

    Dive into the research topics of 'Promotion effect of proton-conducting oxide BaZr0. 1Ce0. 7Y0. 2O3− δ on the catalytic activity of Ni towards ammonia synthesis from hydrogen and nitrogen'. Together they form a unique fingerprint.

    Cite this