najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2023-14-6-679-689najo-161Research ArticleCHEMISTRY AND MATERIALS SCIENCEХИМИЯ И НАУКА О МАТЕРИАЛАХAlumina and silica supported Ce–Fe–O systems obtained by the solution combustion method and their performance in CO2 hydrogenation to syngasCe–Fe–O системы, полученные методом растворного горения в присутствии оксида алюминия и кремния, и их эффективность в гидрировании CO2 до синтез-газаhttps://orcid.org/0000-0001-6689-1430МатвееваА. Н.MatveyevaA. N.

Anna N. Matveyeva

Politekhnicheskaya st., 28, St.-Petersburg, 194021

anna.matveyeva@mail.ioffe.ruhttps://orcid.org/0000-0002-6862-128XОмаровШ. О.OmarovSh. O.

Shamil O. Omarov

Politekhnicheskaya st., 28, St.-Petersburg, 194021

somarov@mail.ioffe.ruhttps://orcid.org/0000-0001-6163-9316ГавриловаМ. А.GavrilovaM. A.

Marianna A. Gavrilova

Politekhnicheskaya st., 28, St.-Petersburg, 194021

Moskovskiy av., 26, St.-Petersburg, 190013

amonrud@yandex.ruIoffe InstituteRussian FederationIoffe Institute; St.-Petersburg State Institute of Technology (Technical University)Russian Federation202302062025146679689Copyright © Matveyeva A.N., Omarov S.O., Gavrilova M.A., 20252025Матвеева А.Н., Омаров Ш.О., Гаврилова М.А.Matveyeva A.N., Omarov S.O., Gavrilova M.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/161

This study presents Ce–Fe–O systems supported on -Al2O3 or SiO2 to enhance the reactivity of an oxygen-deficient CeFeO3 perovskite phase, which are promising catalysts for the production of fuels and chemicals from CO2 as feedstock. The synthesis was carried out by the glycine-nitrate solution combustion method at various fuel-to-oxidizer ratios, and with or without the addition of ammonium nitrate. The obtained composites were characterized by XRD, SEM, EDX, N2-physisorption, H2-TPR, and CO2-TPD to study the relationship of physicochemical properties with catalytic CO2 hydrogenation (rWGS) activity. -Al2O3 was found to be a more suitable support than SiO2 due to its ability to form a higher content of the perovskite phase, significantly reduce the size of CeFeO3 crystallites, and increase oxygen defectiveness and CO2 adsorption capacity. Combustion in the presence of silica results in the binding of most of cerium into a silicate phase, which is inactive for rWGS.

В настоящей работе представлены Ce–Fe–O системы, нанесенные на γ-Al2O3 или SiO2, для повышения реакционной способности кислородно-дефицитной фазы перовскита CeFeO3, которые являются перспективными катализаторами для производства топлива и химикатов из CO2. Синтез проводился методом растворного горения при различных отношениях горючего (глицина) и окислителя, с добавлением или без добавления нитрата аммония. Полученные композиты были охарактеризованы методами РФА, СЭМ, ЭДС, N2-физосорбции, H2-ТПВ и CO2-ТПД для выявления связи физико-химических свойств с каталитической активностью в гидрировании CO2. γ-Al2O3 оказался более подходящим носителем, чем SiO2, благодаря его способности образовывать более высокое содержание перовскита, уменьшать размер кристаллитов CeFeO3, увеличивать кислородную дефектность и адсорбционную способность CO2. Горение в присутствии кремнезема приводит к связыванию большей части церия в силикатную фазу, которая неактивна для реакции сдвига водяного газа.

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The authors declare that there are no conflicts of interest present.