The Surface Specificity of the Oscillating CO Oxidation on Platinum Investigated by Field Ion Microscopy Научная публикация
| Конференция |
40th International Field Emission Symposium 02-06 авг. 1993 , Nagoya |
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| Журнал |
Applied Surface Science
ISSN: 0169-4332 |
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| Вых. Данные | Год: 1994, Том: 76-77, Номер: 1-4, Страницы: 122-128 Страниц : 7 DOI: 10.1016/0169-4332(94)90332-8 | ||||
| Авторы |
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| Организации |
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Реферат:
The in-situ observation of the CO oxidation in the field ion microscope is possible due to the preferential field ionization of molecular oxygen which acts as imaging gas and displays Oad sites with atomic resolution. A dynamic bistability of the oxidation reaction is caused by catalytically inactive COad-covered Pt surfaces and active Oad-covered ones. Self-sustained long-lasting oscillations of the Full-size image (<1 K) O2 → CO2 reaction are investigated at pCO ≈ 10-6 to 10-5 mbar, pO2 ≈ 1 × 10-4 to 5 × 10-4 mbar, and temperatures of T = 330 K to 550 K. Oscillation frequencies increase from 10-3 s-1 at 330 K to 1 s-1 at 550 K. A pronounced surface selectivity is found, surface regions near the {110} planes, i.e. {331} terraces, act as pacemakers. The Pt{111} planes are always COad-covered and do not participate in oscillations. Some general conclusions are drawn on the surface specificity of catalytic surface reactions and on still open questions of oscillating surface reactions.
Библиографическая ссылка:
Gorodetskii V.
, Drachsel W.
, Block J.H.
The Surface Specificity of the Oscillating CO Oxidation on Platinum Investigated by Field Ion Microscopy
Applied Surface Science. 1994. V.76-77. N1-4. P.122-128. DOI: 10.1016/0169-4332(94)90332-8 WOS Scopus РИНЦ CAPlusCA OpenAlex Sciact
The Surface Specificity of the Oscillating CO Oxidation on Platinum Investigated by Field Ion Microscopy
Applied Surface Science. 1994. V.76-77. N1-4. P.122-128. DOI: 10.1016/0169-4332(94)90332-8 WOS Scopus РИНЦ CAPlusCA OpenAlex Sciact
Даты:
| Поступила в редакцию: | 2 авг. 1993 г. |
| Принята к публикации: | 31 авг. 1993 г. |
| Опубликована в печати: | 2 мар. 1994 г. |
| Опубликована online: | 10 окт. 2002 г. |
Идентификаторы БД:
| Web of science: | WOS:A1994ND58700022 |
| Scopus: | 2-s2.0-0028383688 |
| РИНЦ: | 31085502 |
| Chemical Abstracts: | 1994:308422 |
| Chemical Abstracts (print): | 120:308422 |
| OpenAlex: | W1974712431 |
| Sciact: | 12322 |