Surface modification of platinum with copper and by plasma-chemical treatment and the effect on H-Pt bond energy

Kinetics of H2 desorption from the surface of a platinum catalyst applied to silica gel, as well as from the surface of the same catalyst modified with a copper additive, is studied. Desorption of hydrogen was studied both before and after the treatment of the catalyst in the electric glow discharge of argon or oxygen or in the high-frequency H2 plasma. The H-Pt bond energy was found to increase upon the introduction of cop- per additive and decrease upon the plasma-chemical treatment of copper-platinum specimens. In the latter case, the size of metal particles increases and the microstrain in them decreases. The observed changes in H- Pt bond energy are explained by the change in the electronic state of the surface and the increase in the num- ber of metal structure defects. © Pleiades Publishing, Ltd., 2012.

Издательство
Maik Nauka Publishing / Springer SBM
Номер выпуска
2
Язык
Английский
Страницы
175-178
Статус
Опубликовано
Том
48
Год
2012
Организации
  • 1 People's Friendship University of Russia, Ul. Miklukho-Maklaya 6, Moscow, 117198, Russian Federation
Ключевые слова
Catalysts; Chemical modification; Desorption; Electronic states; Glow discharges; Platinum; Platinum compounds; Silica; Silica gel; Surface defects; Surface treatment; Bond energies; Desorption of hydrogen; High frequency HF; Metal particle; Metal structures; Micro-strain; Plasma chemical treatment; Platinum catalysts; Chemical bonds
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/2379/
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