Metal-Decorated Opal-Like Silica Catalysts: High-Temperature Reconstructions in Cobalt-Ceria Active Layer during Simultaneous Oxidation of CO and Hydrocarbons Full article
| Journal |
Applied Catalysis A: General
ISSN: 0926-860X , E-ISSN: 1873-3875 |
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| Output data | Year: 2024, Volume: 687, Article number : 119981, Pages count : 14 DOI: 10.1016/j.apcata.2024.119981 | ||||||
| Tags | Cobalt; ceria; opal-like silica; prompt thermal aging; catalytic oxidation | ||||||
| Authors |
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| Affiliations |
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Funding (3)
| 1 | Ministry of Science and Higher Education of the Russian Federation | FWUR-2024-0034 |
| 2 | Ministry of Science and Higher Education of the Russian Federation | АААА-А21-121011590090-7 |
| 3 | Ministry of Science and Higher Education of the Russian Federation | FFUG-2024-0017 |
Abstract:
Opal-like silica, which represents a new class of SiO2-based nanomaterials, was used as a support for the deposition of cobalt and cerium oxides as active components. A series of samples was prepared and tested in the oxidation of CO and hydrocarbons in a prompt thermal aging regime. As revealed by a set of physicochemical methods, the initial catalytic performance of the samples is high (T50 = 214 °С) due to the emergence of new catalytic sites, which appeared as a result of interaction between Co and Ce oxides located between silica nanospheres in a close proximity to each other. At 800 °C, these particles undergo agglomeration, which is expressed in a slight deactivation of the catalysts (T50 ≥ 260 °С). The bulk silicate phase is formed at 900 °C, thus leading to further deactivation. Recovering of the catalytic activity (T50 = 252 °С) takes place at 1000 °С.
Cite:
Veselov G.B.
, Eurov D.A.
, Shilina M.I.
, Rostovshchikova T.N.
, Stoyanovskii V.O.
, Yagovkina M.A.
, Kurdyukov D.A.
, Vedyagin A.A.
Metal-Decorated Opal-Like Silica Catalysts: High-Temperature Reconstructions in Cobalt-Ceria Active Layer during Simultaneous Oxidation of CO and Hydrocarbons
Applied Catalysis A: General. 2024. V.687. 119981 :1-14. DOI: 10.1016/j.apcata.2024.119981 WOS Scopus AN OpenAlex
Metal-Decorated Opal-Like Silica Catalysts: High-Temperature Reconstructions in Cobalt-Ceria Active Layer during Simultaneous Oxidation of CO and Hydrocarbons
Applied Catalysis A: General. 2024. V.687. 119981 :1-14. DOI: 10.1016/j.apcata.2024.119981 WOS Scopus AN OpenAlex
Dates:
| Submitted: | Sep 12, 2024 |
| Accepted: | Oct 14, 2024 |
| Published online: | Oct 15, 2024 |
| Published print: | Nov 25, 2024 |
Identifiers:
| Web of science: | WOS:001338720400001 |
| Scopus: | 2-s2.0-85206451388 |
| Chemical Abstracts: | 2024:2244148 |
| OpenAlex: | W4403418076 |
Citing:
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