Bimetallic Pd–Au/Highly Oriented Pyrolytic Graphite Catalysts: from Composition to Pairwise Parahydrogen Addition Selectivity Научная публикация
| Журнал |
The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455 |
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| Вых. Данные | Год: 2018, Том: 122, Номер: 32, Страницы: 18588-18595 Страниц : 8 DOI: 10.1021/acs.jpcc.8b06281 | ||||||||||
| Ключевые слова | PHOTOIONIZATION CROSS-SECTIONS; METAL-SUPPORT INTERACTIONS; INDUCED POLARIZATION; HETEROGENEOUS HYDROGENATION; MODEL CATALYSTS; ACTIVE-SITES; NANOPARTICLES; AU; GOLD; SPECTROSCOPY | ||||||||||
| Авторы |
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| Организации |
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Информация о финансировании (4)
| 1 | Российский научный фонд | 14-23-00146 |
| 2 | Российский научный фонд | 17-73-20030 |
| 3 | Helmholtz-Centre Berlin for Materials and Energy BESSY | |
| 4 | Федеральное агентство научных организаций России | 0333-2018-0006 (II.1.13.1.) |
Реферат:
The model Pd and Au mono- and bi-metallic (Pd-Au) catalysts were prepared using vapor deposition of metals (Au and/or Pd) under ultrahigh vacuum conditions on the defective highly oriented pyrolytic graphite (HOPG) surface. The model catalysts were investigated using the X-ray photoelectron spectroscopy and scanning tunneling microscopy at each stage of the preparation procedure. For the preparation of bimetallic catalysts, different procedures were used to get different structures of PdAu particles (Au-shell -Pd-core or alloyed). All prepared catalysts showed rather narrow particles size distribution with an average particles size in the range of 4-7 nm. Parahydrogen-enhanced nuclear magnetic resonance spectroscopy was used as a tool for the investigation of Pd-Au/ HOPG, Pd/HOPG, and Au/HOPG model catalysts in propyne hydrogenation. In contrast to Au sample, Pd, PdAualloy, and Au-shell-Pd-core samples were shown to have catalytic activity in propyne conversion, and pairwise hydrogen addition routes were observed. Moreover, bimetallic samples demonstrated the 2to 5-fold higher activity in pairwise hydrogen addition in comparison to the monometallic Pd sample. It was shown that the structures of bimetallic Pd-Au particles supported on HOPG strongly affected their activities and/or selectivities in propyne hydrogenation reaction: the catalyst with the Au-shell-Pd-core structure demonstrated higher pairwise selectivity than that with the PdAu(alloy )structure. Thus, the reported approach can be used as an effective tool for the synergistic effects investigations in hydrogenation reactions over model bimetallic Pd-Au catalysts, where the active component is supported on a planar support.
Библиографическая ссылка:
Bukhtiyarov A.V.
, Burueva D.B.
, Prosvirin I.P.
, Klyushin A.Y.
, Panafidin M.A.
, Kovtunov K.V.
, Bukhtiyarov V.I.
, Koptyug I.V.
Bimetallic Pd–Au/Highly Oriented Pyrolytic Graphite Catalysts: from Composition to Pairwise Parahydrogen Addition Selectivity
The Journal of Physical Chemistry C. 2018. V.122. N32. P.18588-18595. DOI: 10.1021/acs.jpcc.8b06281 WOS Scopus РИНЦ CAPlusCA OpenAlex
Bimetallic Pd–Au/Highly Oriented Pyrolytic Graphite Catalysts: from Composition to Pairwise Parahydrogen Addition Selectivity
The Journal of Physical Chemistry C. 2018. V.122. N32. P.18588-18595. DOI: 10.1021/acs.jpcc.8b06281 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Поступила в редакцию: | 2 июл. 2018 г. |
| Опубликована online: | 24 июл. 2018 г. |
| Опубликована в печати: | 16 авг. 2018 г. |
Идентификаторы БД:
| Web of science: | WOS:000442462400044 |
| Scopus: | 2-s2.0-85050771074 |
| РИНЦ: | 35789531 |
| Chemical Abstracts: | 2018:1369696 |
| Chemical Abstracts (print): | 169:321483 |
| OpenAlex: | W2883225526 |