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Surface Science Approach to Pt/Carbon Model Catalysts: XPS, STM and Microreactor Studies Научная публикация

Конференция 2nd International Conference on Applied Surface Science
12-15 июн. 2017 , Dalian
Журнал Applied Surface Science
ISSN: 0169-4332
Вых. Данные Год: 2018, Том: 440, Страницы: 680-687 Страниц : 8 DOI: 10.1016/j.apsusc.2018.01.148
Ключевые слова platinum; carbon; model catalysts; ethylene; hydrogenation; photoelectron spectroscopy; scanning tunneling microscopy; microreactor
Авторы Motin Abdul Md. 1 , Haunold Thomas 1 , Bukhtiyarov Andrey 2 , Bera Abhijit 1,3 , Rameshan Christoph 1 , Rupprechter Günther 1
Организации
1 Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9/BC/01, 1060 Vienna, Austria
2 Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave., 5, Novosibirsk 630090, Russia
3 Department of Physics, Midnapore College (Autonomous), 721101, Paschim Medinipur, India

Информация о финансировании (4)

1 FWF Austrian Science Fund F4502-N16 (SFB FOXSI)
2 FWF Austrian Science Fund I 1041-N28 (ComCat)
3 Федеральное агентство научных организаций России 0303-2016-0001
4 Vienna University of Technology

Реферат: Pt nanoparticles supported on carbon are an important technological catalyst. A corresponding model catalyst was prepared by physical vapor deposition (PVD) of Pt on sputtered HOPG (highly oriented pyrolytic graphite). The carbon substrate before and after sputtering as well as the Pt/HOPG system before and after Pt deposition and annealing were examined by XPS and STM. This yielded information on the surface density of defects, which serve as nucleation centres for Pt, and on the size distribution (mean size/height) of the Pt nanoparticles. Two different model catalysts were prepared with mean sizes of 2.0 and 3.6 nm, both turned out to be stable upon UHV-annealing to 300 °C. After transfer into a UHV-compatible flow microreactor and subsequent cleaning in UHV and under mbar pressure, the catalytic activity of the Pt/HOPG model system for ethylene hydrogenation was examined under atmospheric pressure flow conditions. This enabled to determine temperature-dependent conversion rates, turnover frequencies (TOFs) and activation energies. The catalytic results obtained are in line with the characteristics of technological Pt/C, demonstrating the validity of the current surface science based model catalyst approach.
Библиографическая ссылка: Motin A.M. , Haunold T. , Bukhtiyarov A. , Bera A. , Rameshan C. , Rupprechter G.
Surface Science Approach to Pt/Carbon Model Catalysts: XPS, STM and Microreactor Studies
Applied Surface Science. 2018. V.440. P.680-687. DOI: 10.1016/j.apsusc.2018.01.148 WOS Scopus РИНЦ CAPlus OpenAlex
Файлы: Полный текст от издателя
Даты:
Поступила в редакцию: 19 сент. 2017 г.
Принята к публикации: 18 янв. 2018 г.
Опубликована online: 31 янв. 2018 г.
Опубликована в печати: 1 мая 2018 г.
Идентификаторы БД:
Web of science: WOS:000427461000081
Scopus: 2-s2.0-85041385732
РИНЦ: 35520576
Chemical Abstracts: 2018:221801
OpenAlex: W2790797194
Цитирование в БД:
БД Цитирований
Web of science 56
Scopus 59
РИНЦ 49
OpenAlex 59
Альметрики: