Effect of Zr Content on the Activity of 5%СuO/Ce1 – xZrxO2 Catalysts in CO Oxidation by Oxygen in the Excess of Hydrogen Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2019, Volume: 60, Number: 5, Pages: 661-671 Pages count : 11 DOI: 10.1134/S002315841905001X | ||||
| Tags | CO oxidation; oxides; solid solutions | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Federal Agency for Scientific Organizations | 0082-2014-0007 (АААА-А18-118020890105-3) |
| 2 | Russian Foundation for Basic Research | 18-03-00627 (АААА-А18-118022690136-3) |
Abstract:
The article reports the synthesis of 5%CuO/Ce1 – xZrxO2 catalysts based on CeO2, ZrO2 oxides and Ce1 – xZrxO2 solid solutions with х = 0.2, 0.5, and 0.8. It is found that copper oxide is present in the catalysts in a highly dispersed form. In strong interaction with supports, it forms active oxygen, which participates in CO chemisorption and low-temperature oxidation of CO in the presence of hydrogen. In selective CO oxidation, the highest conversion (γmах = 100%) was obtained at temperatures of 120–160°С in the presence of 5%CuO/CeO2. In the modification of CeO2 by zirconium cations, the conversion on 5%Ce0.5Zr0.5O2 decreases to 92% at 160°С because oxygen binding strengthens on copper-containing sites. On the 5%CuO/ZrO2 sample, the maximum conversion is 67% at 180°С. The modification of ZrO2 by cerium cations leads to an increase in the conversion to 87% at 160°С on the 5%CuO/Ce0.2Zr0.8O2 sample as a result of increasing the amount of oxygen vacancies in the support. Taking into account the properties of CO complexes formed on copper-containing oxidation and adsorption sites, and the interaction of these complexes with adsorbed oxygen, their participation in the reaction of low-temperature CO oxidation by oxygen in excess of hydrogen on 5%CuO/CeO2 and 5%CuO/ZrO2 catalysts is considered. © 2019, Pleiades Publishing, Ltd.
Cite:
Il’ichev A.N.
, Bykhovsky M.Y.
, Fattakhova Z.T.
, Shashkin D.P.
, Fedorova Y.E.
, Matyshak V.A.
, Korchak V.N.
Effect of Zr Content on the Activity of 5%СuO/Ce1 – xZrxO2 Catalysts in CO Oxidation by Oxygen in the Excess of Hydrogen
Kinetics and Catalysis. 2019. V.60. N5. P.661-671. DOI: 10.1134/S002315841905001X WOS Scopus РИНЦ AN OpenAlex
Effect of Zr Content on the Activity of 5%СuO/Ce1 – xZrxO2 Catalysts in CO Oxidation by Oxygen in the Excess of Hydrogen
Kinetics and Catalysis. 2019. V.60. N5. P.661-671. DOI: 10.1134/S002315841905001X WOS Scopus РИНЦ AN OpenAlex
Original:
Ильичев А.Н.
, Быховский М.Я.
, Фаттахова З.Т.
, Шашкин Д.П.
, Федорова Ю.Е.
, Матышак В.А.
, Корчак В.Н.
Влияние содержания Zr на активность катализаторов 5%СuО/Ce1–xZrxO2 в реакции окисления СО кислородом в избытке водорода
Кинетика и катализ. 2019. Т.60. №5. С.654-664. DOI: 10.1134/S0453881119050010 РИНЦ OpenAlex
Влияние содержания Zr на активность катализаторов 5%СuО/Ce1–xZrxO2 в реакции окисления СО кислородом в избытке водорода
Кинетика и катализ. 2019. Т.60. №5. С.654-664. DOI: 10.1134/S0453881119050010 РИНЦ OpenAlex
Dates:
| Submitted: | Dec 25, 2018 |
| Accepted: | Apr 17, 2019 |
| Published print: | Sep 1, 2019 |
| Published online: | Oct 7, 2019 |
Identifiers:
| Web of science: | WOS:000490016900013 |
| Scopus: | 2-s2.0-85073243366 |
| Elibrary: | 41688430 |
| Chemical Abstracts: | 2019:1920745 |
| OpenAlex: | W2979472488 |