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Catalytic impact of RuOx clusters to high NH3 sensitivity of tin dioxideстатья
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: 19 июля 2013 г.
- Авторы: Marikutsa A., Krivetskiy V., Rumyantseva M., Konstantinova E., Ponzoni A., Comini E., Gaskov A.
- Журнал: Procedia Engineering
- Том: 25
- Год издания: 2011
- Первая страница: 227
- Последняя страница: 230
- DOI: 10.1016/j.proeng.2011.12.056
- Аннотация: A comparative study of NH 3-sensing properties of blank and modified nanocrystalline SnO 2 was performed. Tin dioxide modified by ruthenium displayed outstanding ammonia sensitivity with a maximum signal at 200°C. The modifier was shown by XPS to possess mixed valence states of oxidized ruthenium. The RuO x-modified material was shown by EPR to contain up to 14 at. % of Ru 3+ distributed between the surface and the bulk of SnO 2 crystallites. From EPR study of SnO 2/RuO x interaction with NH 3/air mixture Ru 3+ to Ru 4+ oxidation was deduced. This could be due to oxidative products of NH 3 conversion, that was supported by the oxidative-like gas response during sensing tests using the NH 3/air gas flow passed through a preconcentrator with RuO x-modified tin dioxide heated to 200°C. © 2011 Published by Elsevier Ltd.
- Добавил в систему: Кривецкий Валерий Владимирович