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. 2022 Jun 13;12(13):7609–7621. doi: 10.1021/acscatal.2c00905

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© 2022 The Authors. Published by American Chemical Society

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Photoelectron spectra of C 1s, O 1s, and Fe 2p_3/2 regions recorded using 4.6 keV photons in 1CO:1H₂ (top row) and 1CO:10H₂ (bottom row) reaction gas mixtures at 2 and 2.5 L_n/min total flows correspondingly and 550 mbar pressure. Note that selected lower-temperature spectra of C 1s and Fe 2p_3/2 regions are magnified by factors of 2, 3, and 5 for better visibility of the iron oxide contribution and surface carbon-containing adsorbates. Approximate locations of determined species are annotated in the figure. “TP-” and “O-carbide” stand for carbide structures with trigonal prismatic and octahedral sites occupied by carbon atoms, respectively.