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Specific Interaction of PdOx- and RuOy‑Modified Tin Dioxide with CO and NH3 Gases: Kelvin Probe and DRIFT Studiesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 2 декабря 2015 г.
- Авторы: Artem Marikutsa, Marina Rumyantseva, Alexander Gaskov
- Журнал: Journal of Physical Chemistry C
- Том: 119
- Год издания: 2015
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 24342
- Последняя страница: 24350
- DOI: 10.1021/acs.jpcc.5b02532
- Аннотация: The processes of selective interactions of gas-sensitive nanocrystalline tin dioxide modified by catalytic PdOx and RuOy clusters with parts per million range concentrations of CO and NH3 in air were studied. From simultaneous in situ work function and resistance measurements, it was deduced that the modifiers promote specific interaction of gas molecules with the materials surface. In situ DRIFT studies revealed a key role of catalytic clusters in the selective gas−solid interactions. Specific CO chemisorption on Pd sites was observed at room temperature. It is assumed to facilitate further oxidation of the molecules on the surface of SnO2/PdOx providing its low-temperature sensitivity to carbon monoxide. The selectivity of SnO2/RuOy to ammonia is due to the modifier-catalyzed deep oxidation of NH3 molecules, which was evidenced by the evolvement of Ru-bound nitrosyl species during the interaction at raised temperature. The possible routes were suggested for specific SnO2/PdOx−CO and SnO2/RuOy−NH3 interactions as a summary of experimental observations.
- Добавил в систему: Марикуца Артем Валерьевич
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