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Optimizing Ni-Fe-Ga alloys into Ni$_{2}$FeGa for the hydrogenation of CO$_{2}$ into methanol

Smitshuysen, Thomas Erik Lyck; Nielsen, Monia R.; Pruessmann, Tim ORCID iD icon 1; Zimina, Anna 1; Sheppard, Thomas L. ORCID iD icon 1,2; Grunwaldt, Jan-Dierk ORCID iD icon 1,2; Chorkendorff, Ib; Damsgaard, Christian D.
1 Institut für Technische Chemie und Polymerchemie (ITCP), Karlsruher Institut für Technologie (KIT)
2 Institut für Katalyseforschung und -technologie (IKFT), Karlsruher Institut für Technologie (KIT)

Abstract:

A screening study of the catalytic performance of ternary alloy nanoparticles containing nickel, iron and gallium supported on silica for methanol synthesis from CO$_{2}$ and H$_{2}$ was performed. Catalysts were prepared by incipient wetness impregnation and subsequently reduced in H$_{2}$ before catalytic testing. Ni$_{2}$FeGa showed the best performance of the tested catalysts in terms of methanol yield. An optimization of the preparation was done to improve activity and selectivity, reaching a performance close to that of commercially available Cu/ZnO/Al$_{2}$O$_{3}$/MgO at low reaction temperatures and pressure. Extensive in situ characterisation using environmental TEM, in situ XRD and in situ EXAFS of the formation of the Ni$_{2}$FeGa catalyst explains an optimal reduction temperature of 550 °C: warm enough that the three atomic species will form an alloy while cold enough to prevent the catalyst from sintering during the formation.


Postprint §
DOI: 10.5445/IR/1000117905
Veröffentlicht am 27.05.2022
Originalveröffentlichung
DOI: 10.1002/cctc.202000174
Scopus
Zitationen: 14
Web of Science
Zitationen: 11
Dimensions
Zitationen: 16
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Institut für Technische Chemie und Polymerchemie (ITCP)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 18.06.2020
Sprache Englisch
Identifikator ISSN: 1867-3880
KITopen-ID: 1000117905
HGF-Programm 37.03.01 (POF III, LK 01) Catalysts and Mechanisms
Weitere HGF-Programme 56.98.01 (POF III, LK 01) Betrieb in MML
Erschienen in ChemCatChem
Verlag Wiley-VCH Verlag
Band 12
Heft 12
Seiten 3265-3273
Vorab online veröffentlicht am 25.03.2020
Nachgewiesen in Web of Science
Dimensions
Scopus
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