Low-Loaded Pt-Pd Diesel Oxidation Catalyst: MnOx Loading Effects Научная публикация
| Журнал |
Topics in Catalysis
ISSN: 1022-5528 , E-ISSN: 1572-9028 |
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| Вых. Данные | Год: 2025, Том: 68, Страницы: 357–378 Страниц : 22 DOI: 10.1007/s11244-024-02023-6 | ||
| Ключевые слова | Diesel oxidation catalyst; Manganese oxide; Noble metal; Particle size effect; Structural effect | ||
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| Организации |
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Информация о финансировании (1)
| 1 | Министерство науки и высшего образования Российской Федерации (с 15 мая 2018) | FWUR-2024-0033 |
Реферат:
To reduce the content of Pt-group metals in a diesel oxidizing catalyst, the possibility of regulating the size of Pt and Pd nanoparticles as well as their microstructure by varying the amount (2.5–10 wt%) of the MnOx modifying additive added to the Pt–Pd/Al2O3 catalyst has been studied. It was revealed that the as-prepared modified catalysts contain oxide clusters and single highly dispersed PtOx/PdOx nanoparticles, the cluster sizes dynamically changed under the electron beam during the registration of TEM images. Under reducing conditions (CO /250°C), PtOx/PdOx turn into metallic nanoparticles; their average size decreased (from 4.39 to 3.47 nm) with an increase in MnOx content. It was found that the amount of reactive oxygen contained in PdOx/PtOx clusters and capable of interacting with CO at a temperature of 50–180 °C under TPR–CO conditions increases in proportion to the MnOx content in the as-prepared catalysts. A similar trend characterized the ability of metal clusters and nanoparticles of Pt and/or Pd in the reduced MnOx-modified samples to low-temperature oxidation with molecular oxygen. Both factors provide low light-off temperatures and low–temperature CO oxidation activity to Pt-Pd/MnOx-Al2O3 catalysts.
Библиографическая ссылка:
Yashnik S.A.
, Surovtsova T.A.
, Salnikov A.V.
Low-Loaded Pt-Pd Diesel Oxidation Catalyst: MnOx Loading Effects
Topics in Catalysis. 2025. V.68. P.357–378. DOI: 10.1007/s11244-024-02023-6 WOS Scopus CAPlus OpenAlex
Low-Loaded Pt-Pd Diesel Oxidation Catalyst: MnOx Loading Effects
Topics in Catalysis. 2025. V.68. P.357–378. DOI: 10.1007/s11244-024-02023-6 WOS Scopus CAPlus OpenAlex
Даты:
| Принята к публикации: | 3 окт. 2024 г. |
| Опубликована online: | 28 окт. 2024 г. |
| Опубликована в печати: | 1 февр. 2025 г. |
Идентификаторы БД:
| Web of science: | WOS:001346586700001 |
| Scopus: | 2-s2.0-85207536395 |
| Chemical Abstracts: | 2024:2340645 |
| OpenAlex: | W4403809076 |