TY - JOUR
T1 - CeFeO3–CeO2–Fe2O3 Systems
T2 - Synthesis by Solution Combustion Method and Catalytic Performance in CO2 Hydrogenation
AU - Matveyeva, Anna N.
AU - Omarov, Shamil O.
AU - Gavrilova, Marianna A.
AU - Sladkovskiy, Dmitry A.
AU - Murzin, Dmitry Yu
N1 - Funding Information:
This research was funded by the Russian Science Foundation (grant number 22–23–20094, https://rscf.ru/project/22-23-20094/, accessed on 20 October 2022) and the St. Petersburg Science Foundation (agreement number 26/2022 from 14 April 2022).
Publisher Copyright:
© 2022 by the authors.
PY - 2022/11
Y1 - 2022/11
N2 - Rare-earth orthoferrites have found wide application in thermocatalytic reduction-oxidation processes. Much less attention has been paid, however, to the production of CeFeO3, as well as to the study of its physicochemical and catalytic properties, in particular, in the promising process of CO2 utilization by hydrogenation to CO and hydrocarbons. This study presents the results of a study on the synthesis of CeFeO3 by solution combustion synthesis (SCS) using various fuels, fuel-to-oxidizer ratios, and additives. The SCS products were characterized by XRD, FTIR, N2-physisorption, SEM, DTA–TGA, and H2-TPR. It has been established that glycine provides the best yield of CeFeO3, while the addition of NH4NO3 promotes an increase in the amount of CeFeO3 by 7–12 wt%. In addition, the synthesis of CeFeO3 with the participation of NH4NO3 makes it possible to surpass the activity of the CeO2–Fe2O3 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 FeOx nanoparticles on the surface of crystallites, and an increase in the surface defects. CeFeO3 obtained in this study allows for achieving higher CO2 conversion compared to LaFeO3 at 600 °C.
AB - Rare-earth orthoferrites have found wide application in thermocatalytic reduction-oxidation processes. Much less attention has been paid, however, to the production of CeFeO3, as well as to the study of its physicochemical and catalytic properties, in particular, in the promising process of CO2 utilization by hydrogenation to CO and hydrocarbons. This study presents the results of a study on the synthesis of CeFeO3 by solution combustion synthesis (SCS) using various fuels, fuel-to-oxidizer ratios, and additives. The SCS products were characterized by XRD, FTIR, N2-physisorption, SEM, DTA–TGA, and H2-TPR. It has been established that glycine provides the best yield of CeFeO3, while the addition of NH4NO3 promotes an increase in the amount of CeFeO3 by 7–12 wt%. In addition, the synthesis of CeFeO3 with the participation of NH4NO3 makes it possible to surpass the activity of the CeO2–Fe2O3 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 FeOx nanoparticles on the surface of crystallites, and an increase in the surface defects. CeFeO3 obtained in this study allows for achieving higher CO2 conversion compared to LaFeO3 at 600 °C.
KW - CeFeO
KW - cerium orthoferrite
KW - CO
KW - glycine
KW - hydrogenation
KW - perovskite
KW - solution combustion synthesis
KW - urea
KW - urotropine
UR - http://www.scopus.com/inward/record.url?scp=85142741284&partnerID=8YFLogxK
U2 - 10.3390/ma15227970
DO - 10.3390/ma15227970
M3 - Article
AN - SCOPUS:85142741284
SN - 1996-1944
VL - 15
JO - Materials
JF - Materials
IS - 22
M1 - 7970
ER -