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In-situ XPS and XAS Studies of a New Phenomenon of Kinetic Hysteresis in Selective Methane Oxidation over Platinum Доклады на конференциях

Язык Английский
Тип доклада Устный
Конференция EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources”
30 авг. - 4 сент. 2015 , Казань
Авторы Пахаруков Илья Юрьевич 1,2 , Бухтияров Валерий Иванович 1,2 , Четырин Игорь Анатольевич 1,2 , Просвирин Игорь Петрович 1,2 , Пармон Валентин Николаевич 1,2 , Мурзин Вадим Юрьевич 3 , Зубавичус Ян Витаутасович 3
Организации
1 Институт катализа им. Г.К. Борескова СО РАН
2 Новосибирский национальный исследовательский государственный университет
3 Национальный исследовательский центр "Курчатовский институт"

Реферат: Recently, we discovered a new phenomenon of kinetic hysteresis in selective methane oxidation over platinum catalysts. To establish the causes of this phenomenon, we studied changes in the oxidation state of active component in real Pt/γ-Al2O3 catalysts by in-situ X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). In-situ XPS experiments revealed the presence of kinetic hysteresis even at low pressures (~ 0.01 mbar). Analysis of the in-situ XPS spectra showed that the catalyst activation was associated with partial reduction of the supported platinum. The XAS data also implied that the activation was accompanied by predominant formation of the metallic platinum, while oxidation of the platinum surface led to deactivation.
Библиографическая ссылка: Pakharukov I.Y. , Bukhtiyarov V.I. , Chetyrin I.A. , Prosvirin I.P. , Parmon V.N. , Murzin V.Y. , Zubavichus Y.V.
In-situ XPS and XAS Studies of a New Phenomenon of Kinetic Hysteresis in Selective Methane Oxidation over Platinum
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” 30 Aug - 4 Sep 2015