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- Title
In situ characterization of Cu-Fe-O catalyst for water-gas shift reaction.
- Authors
Hou, Mengning; Ma, Lingjuan; Ma, Hongbin; Yue, Mingbo
- Abstract
Cu-Fe-O catalyst consisting of α-FeO with supported CuO nanoparticles was prepared through co-precipitation. Integrated analyses of surface and bulk of the catalyst particles showed that it consists of α-FeO with supported CuO nanoparticles. The supported CuO can be reduced to metallic Cu at a temperature of 100-150 °C with a following transformation of α-FeO to FeO at a temperature of 150-200 °C. The composition of Cu/FeO was identified by in situ X-ray diffraction, high-angle annular dark field scanning transmission electron microscope and ambient pressure X-ray photoelectron spectrometer. The formed Cu/FeO exhibits high activity for water-gas shift reaction in the temperature range of 180-250 °C. Activation barrier of WGS on Cu/FeO is lower than Cu/AlO by 10-15 kJ/mol, suggesting that FeO participates into the WGS in the low-temperature range. Ambient pressure X-ray photoelectron spectroscopy studies show that the active surface phase during WGS consists of metallic Cu nanoparticles and FeO nanoparticles.
- Subjects
COPPER compounds synthesis; CATALYST synthesis; WATER gas shift reactions; COPPER oxide; NANOPARTICLE synthesis; X-ray diffraction; X-ray photoelectron spectroscopy
- Publication
Journal of Materials Science, 2018, Vol 53, Issue 2, p1065
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-017-1559-7