Environmental Transmission Electron Microscopy (ETEM) Studies of Single Iron Nanoparticle Carburization in Synthesis Gas

Xi Liu, Chenghua Zhang, Yongwang Li, J.W. Niemantsverdriet, Jakob Birkedal Wagner, Thomas Willum Hansen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Structuralevolution of iron nanoparticles involving the formationand growth of iron carbide nuclei in the iron nanoparticle was directlyvisualized at the atomic level, using environmental transmission electronmicroscopy (TEM) under reactive conditions mimicking Fischer–Tropschsynthesis. Formation of the iron carbide nuclei and surface reconstructionof the iron nanoparticle play an essential role in carburization ofthe iron nanoparticle and consequent formation of Fe5C2. Identification of carbide and oxide intermediates evidencedby high-resolution TEM images, electron diffraction patterns and electronenergy-loss spectra provides a detailed picture from initial activationto final degradation of iron under synthesis gas.
    Original languageEnglish
    JournalA C S Catalysis
    Volume7
    Issue number7
    Pages (from-to)4867-4875
    Number of pages9
    ISSN2155-5435
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Environmental TEM
    • Iron carbide
    • Fischer−Tropsch synthesis
    • In situ
    • EELS

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