CeFeO 3 -CeO 2 -Fe 2 O 3 Systems: Synthesis by Solution Combustion Method and Catalytic Performance in CO 2 Hydrogenation
Rare-earth orthoferrites have found wide application in thermocatalytic reduction-oxidation processes. Much less attention has been paid, however, to the production of CeFeO , as well as to the study of its physicochemical and catalytic properties, in particular, in the promising process of CO utili...
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Published in | Materials Vol. 15; no. 22 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
11.11.2022
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Subjects | |
Online Access | Get full text |
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Summary: | Rare-earth orthoferrites have found wide application in thermocatalytic reduction-oxidation processes. Much less attention has been paid, however, to the production of CeFeO
, as well as to the study of its physicochemical and catalytic properties, in particular, in the promising process of CO
utilization by hydrogenation to CO and hydrocarbons. This study presents the results of a study on the synthesis of CeFeO
by solution combustion synthesis (SCS) using various fuels, fuel-to-oxidizer ratios, and additives. The SCS products were characterized by XRD, FTIR, N
-physisorption, SEM, DTA-TGA, and H
-TPR. It has been established that glycine provides the best yield of CeFeO
, while the addition of NH
NO
promotes an increase in the amount of CeFeO
by 7-12 wt%. In addition, the synthesis of CeFeO
with the participation of NH
NO
makes it possible to surpass the activity of the CeO
-Fe
O
system at low temperatures (300-400 °C), as well as to increase selectivity to hydrocarbons. The observed effects are due to the increased gas evolution and ejection of reactive FeO
nanoparticles on the surface of crystallites, and an increase in the surface defects. CeFeO
obtained in this study allows for achieving higher CO
conversion compared to LaFeO
at 600 °C. |
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ISSN: | 1996-1944 1996-1944 |