Low temperature prepared copper-iron mixed oxides for the selective CO oxidation in the presence of hydrogen

Low temperature prepared copper-iron mixed oxides for the selective CO oxidation in the presence of hydrogen. Yeste, M., Vidal, H., García-Cabeza, A., Hernández-Garrido, J., Guerra, F., Cifredo, G., González-Leal, J., & Gatica, J. Applied Catalysis A: General, 552:58-69, 2018. cited By 12

Paper doi abstract bibtex

Copper-iron mixed oxides with Fe/Cu molar ratios ranging from pure CuO to Fe2O3 were synthesised by a low temperature co-precipitation method, and tested in the CO-PROX reaction. The extensive characterization performed by means of different techniques showed the progressive variation of physical and chemical properties including composition, texture, structure and reducibility of the prepared oxides. Rietveld analysis of X-ray diffraction data, XPS and Raman spectra, and especially TEM study revealed the formation of CuFe2O4. All the samples were more active and selective below 200 °C than a commercial Pt/Al2O3 catalyst used as a reference. In particular, the catalyst having a 2 Fe/Cu molar ratio, corresponding to the cuprospinel stoichiometry, exhibited the best performance with a 76% conversion and a 60% selectivity at 125 °C, operating with 50% of H2 in the gas stream, being relatively stable in long-term time-on-stream experiments. On the contrary, pure CuO rapidly deactivated in the course of reaction at 150 °C. Differences in catalytic stability were related to a promoting effect of iron in the mixed oxide which makes copper more resistant to full reduction. © 2017 Elsevier B.V.

@ARTICLE{Yeste201858,
author={Yeste, M.P. and Vidal, H. and García-Cabeza, A.L. and Hernández-Garrido, J.C. and Guerra, F.M. and Cifredo, G.A. and González-Leal, J.M. and Gatica, J.M.},
title={Low temperature prepared copper-iron mixed oxides for the selective CO oxidation in the presence of hydrogen},
journal={Applied Catalysis A: General},
year={2018},
volume={552},
pages={58-69},
doi={10.1016/j.apcata.2017.12.012},
note={cited By 12},
url={https://www.scopus.com/inward/record.uri?eid=2-s2.0-85040023401&doi=10.1016%2fj.apcata.2017.12.012&partnerID=40&md5=3bf7095a6bdebc2a90d068b6db050e59},
abstract={Copper-iron mixed oxides with Fe/Cu molar ratios ranging from pure CuO to Fe2O3 were synthesised by a low temperature co-precipitation method, and tested in the CO-PROX reaction. The extensive characterization performed by means of different techniques showed the progressive variation of physical and chemical properties including composition, texture, structure and reducibility of the prepared oxides. Rietveld analysis of X-ray diffraction data, XPS and Raman spectra, and especially TEM study revealed the formation of CuFe2O4. All the samples were more active and selective below 200 °C than a commercial Pt/Al2O3 catalyst used as a reference. In particular, the catalyst having a 2 Fe/Cu molar ratio, corresponding to the cuprospinel stoichiometry, exhibited the best performance with a 76% conversion and a 60% selectivity at 125 °C, operating with 50% of H2 in the gas stream, being relatively stable in long-term time-on-stream experiments. On the contrary, pure CuO rapidly deactivated in the course of reaction at 150 °C. Differences in catalytic stability were related to a promoting effect of iron in the mixed oxide which makes copper more resistant to full reduction. © 2017 Elsevier B.V.},
keywords={Catalyst selectivity;  Catalysts;  Copper;  Copper alloys;  Copper oxides;  Iron;  Iron alloys;  Iron compounds;  Iron oxides;  Low temperature effects;  Precipitation (chemical);  Rietveld analysis;  Temperature;  X ray diffraction, Co oxidation;  CuFe2O4;  Low temperature synthesis;  Mixed oxide;  PROX catalysts, Copper compounds},
document_type={Article},
source={Scopus},
}

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