NO and Deuterium Co-Adsorption on the Reconstructed Pt(100)-hex Surface: A Temperature Programmed Reaction Study Научная публикация
| Журнал |
Surface Science
ISSN: 0039-6028 |
||
|---|---|---|---|
| Вых. Данные | Год: 2000, Том: 453, Номер: 1-3, Страницы: 103-111 Страниц : 9 DOI: 10.1016/S0039-6028(00)00311-3 | ||
| Ключевые слова | Deuterium, Hydrogen molecule, Nitrogen oxides, Platinum, Surface relaxation and reconstruction | ||
| Авторы |
|
||
| Организации |
|
Реферат:
The deuterium adsorption at 270 K on a reconstructed Pt(100)-hex surface covered by NOads was studied by means of temperature programmed reaction (TPR). In the case of adsorption on a clean Pt(100)-hex surface the saturated Dads coverage is 0.06 ML at PH2 =6×10−8 mbar, whereas the Dads uptake is enhanced considerably by NO pre-adsorption. First the Dads uptake increases with increasing NOads coverage, h NO, reaching a maximum at h NO#0.25 ML, and then decreases to zero. This phenomenon is explained as follows. The NO adsorption on the hex
surface leads to the formation of 1×1 islands saturated by NOads and surrounded by the hex phase. The NOads/1×1 islands are assumed to modify the hex phase adjacent to the island boundaries, adapting this area for deuterium adsorption. TPR in the co-adsorption layer of NOads and Dads is initiated by D2 desorption and shows an ‘explosive’ behaviour, manifesting itself in the narrow TPR peaks of N2 and D2 O at ~370 K. The NOads pre-coverage affects the reaction temperature as well. Thus, at NOads coverage of 0.35–0.40 ML the temperature of the surface explosion increases abruptly by ~15–20 K. At this coverage the NOads/1×1 islands are supposed to modify the rest of the hex phase so that, after further D2 adsorption, the surface becomes completely saturated by Dads and NOads species. A possible mechanism for this is discussed.
Библиографическая ссылка:
Vovk E.I.
, Smirnov M.Y.
, Zemlyanov D.Y.
NO and Deuterium Co-Adsorption on the Reconstructed Pt(100)-hex Surface: A Temperature Programmed Reaction Study
Surface Science. 2000. V.453. N1-3. P.103-111. DOI: 10.1016/S0039-6028(00)00311-3 WOS Scopus РИНЦ CAPlusCA OpenAlex
NO and Deuterium Co-Adsorption on the Reconstructed Pt(100)-hex Surface: A Temperature Programmed Reaction Study
Surface Science. 2000. V.453. N1-3. P.103-111. DOI: 10.1016/S0039-6028(00)00311-3 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Поступила в редакцию: | 16 сент. 1999 г. |
| Принята к публикации: | 20 янв. 2000 г. |
| Опубликована в печати: | 10 мая 2000 г. |
| Опубликована online: | 15 мая 2000 г. |
Идентификаторы БД:
| Web of science: | WOS:000087302400018 |
| Scopus: | 2-s2.0-0001732154 |
| РИНЦ: | 13359250 |
| Chemical Abstracts: | 2000:322143 |
| Chemical Abstracts (print): | 133:34803 |
| OpenAlex: | W2052697336 |