Atomic-Scale Imaging of Catalytic Surface Reactions Научная публикация
Конференция |
94th Annual Meeting of the Deutsche Bunsen-Gesellschaft fur Physikalische Chemie "Reaktivitat und Dynamik an Festkorperoberflachen" 25-27 мая 1995 , Bremen |
||||
---|---|---|---|---|---|
Журнал |
Berichte der Bunsengesellschaft/Physical Chemistry Chemical Physics
ISSN: 0940-483X , E-ISSN: 0005-9021 |
||||
Вых. Данные | Год: 1995, Том: 99, Номер: 11, Страницы: 1363-1369 Страниц : 7 DOI: 10.1002/bbpc.199500086 | ||||
Ключевые слова | CATALYSIS; FIELD ION MICROSCOPY; NONLINEAR PHENOMENA | ||||
Авторы |
|
||||
Организации |
|
Информация о финансировании (1)
1 | International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union | 93-964 |
Реферат:
Recent experimental work is reviewed showing that a field ion microscope (FIM) can also serve as an in situ catalytic flow reactor. A platinum field emitter (model catalyst, grain diameter >200 Angstrom) exposes different small single-crystal planes with well-defined crystallographic orientations. The molecules reacting on the catalyst surface are also used as the FIM imaging gas. Due to preferential O-2 field ionization on O-(ad) layers, different surface sites (O-(ad) and CO(ad)) can be discriminated in situ and in real time during the ongoing catalytic CO oxidation. The H-2 oxidation on a Pt field emitter is distinguished by a preferential imaging of catalytically active sites with the product molecule H2O (desorbed mainly as H3O+). Isothermal, non-linear dynamic processes of CO- and H-2 oxidation reactions on Pt are investigated, involving the formation of face-specific adsorption islands, mobility of reaction/diffusion fronts and the creation of chemical waves. The electric fields in the FIM (approximate to 1.5 V/Angstrom) appear to have a minor influence.
Библиографическая ссылка:
Block J.H.
, Drachsel W.
, Ernst N.
, Sieben B.
, Gorodetskii V.
Atomic-Scale Imaging of Catalytic Surface Reactions
Berichte der Bunsengesellschaft/Physical Chemistry Chemical Physics. 1995. V.99. N11. P.1363-1369. DOI: 10.1002/bbpc.199500086 WOS РИНЦ
Atomic-Scale Imaging of Catalytic Surface Reactions
Berichte der Bunsengesellschaft/Physical Chemistry Chemical Physics. 1995. V.99. N11. P.1363-1369. DOI: 10.1002/bbpc.199500086 WOS РИНЦ
Даты:
Опубликована в печати: | 1 нояб. 1995 г. |
Опубликована online: | 18 мар. 2014 г. |
Идентификаторы БД:
Web of science | WOS:A1995TH34700014 |
РИНЦ | 21629603 |
Chemical Abstracts | 1995:930722 |
Chemical Abstracts (print) | 123:323198 |
OpenAlex | W2091929665 |