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Catalytic performance of a single atom Pd1Ag10/Al2O3 catalyst for the selective hydrogenation of acetylene: The role of CO-induced segregationстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 23 января 2026 г.
- Авторы: Mashkovsky I.S., Bukhtiyarov A.V., Markov P.V., Bragina G.O., Baeva G.N., Smirnova N.S., Panafidin M.A., Chetyrin I.A., Gerasimov E.Yu, Zubavichus Y.V., Stakheev A.Yu
- Журнал: Applied Surface Science
- Том: 681
- Год издания: 2025
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 161516
- DOI: 10.1016/j.apsusc.2024.161516
- Аннотация: The single-atom Pd catalysts based on silver-rich bimetallic compositions are known for their extremely high ethylene selectivity in the acetylene hydrogenation reaction; however, their activity is noticeably lower than that of traditional monometallic Pd catalysts. The aim of the work was to apply a method of CO-induced segregation to increase the concentration of single atom Pd1 sites on the surface of Pd1Ag10/Al2O3 catalyst without noticeable formation of multiatomic Pdn (n ≥ 2) ensembles. It has been experimentally established by DRIFTS-CO and XPS methods that the effect of 30 vol% CO exposure temperature on the increase of surface Pd1 sites concentration in the range of 50 to 350 ◦C has a volcano-like dependence with a maximum at ~ 200–250 ◦C. The catalytic tests show a considerable enhancement in activity for samples treated in CO at 200–250 ◦C (the temperature of 100 % acetylene conversion is reduced by ~ 30 ◦C), while the C2H4 selectivity was similar for both freshly reduced and CO-treated catalysts. These results demonstrate the use of CO-induced segregation as a promising method for the controlled increase in the concentration of isolated Pd1 sites to improve the activity of silver-rich palladium catalyst without compromising its selectivity.
- Добавил в систему: Стахеев Александр Юрьевич