Environmental transmission electron microscopy (ETEM) studies of single iron nanoparticle carburization in synthesis gas

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

Research output: Contribution to journalArticleAcademicpeer-review

25 Citations (Scopus)

Abstract

Structural evolution of iron nanoparticles involving the formation and growth of iron carbide nuclei in the iron nanoparticle was directly visualized at the atomic level, using environmental transmission electron microscopy (TEM) under reactive conditions mimicking Fischer-Tropsch synthesis. Formation of the iron carbide nuclei and surface reconstruction of the iron nanoparticle play an essential role in carburization of the iron nanoparticle and consequent formation of Fe5C2. Identification of carbide and oxide intermediates evidenced by high-resolution TEM images, electron diffraction patterns and electron energy-loss spectra provides a detailed picture from initial activation to final degradation of iron under synthesis gas. (Chemical Equation Presented).

Original languageEnglish
Pages (from-to)4867-4875
Number of pages9
JournalACS Catalysis
Volume7
Issue number7
DOIs
Publication statusPublished - 7 Jul 2017

Keywords

  • EELS
  • environmental TEM
  • Fischer-Tropsch synthesis
  • in situ
  • iron carbide

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