In-situ XPS and XAS Studies of a New Phenomenon of Kinetic Hysteresis in Selective Methane Oxidation over Platinum | Sciact - CRIS-system of Boreskov Institute of Catalysis

In-situ XPS and XAS Studies of a New Phenomenon of Kinetic Hysteresis in Selective Methane Oxidation over Platinum Conference Abstracts

Conference

EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources”
30 Aug - 4 Sep 2015 , Казань

Source

EuropaCat XII. Catalysis: Balancing the use of fossil and renewable resources. XII European Congress on Catalysis, Kazan (Russia), 30 August - 4 September, 2015 : Book of Abstracts
Compilation, BIC SB RAS. Novosibirsk.2015. 2184 c. ISBN 978-5-906376-10-7. РИНЦ

Output data

Year: 2015, Article number : ISO-OP23, Pages count : 2

Authors

Pakharukov I.Yu. ^1,2 , Bukhtiyarov V.I. ^1,2 , Chetyrin I.A. ^1,2 , Prosvirin I.P. ^1,2 , Parmon V.N. ^1,2 , Murzin Y.V. ³ , Zubavichus Y.V. ³

Affiliations

1	Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia
2	Novosibirsk State University, Novosibirsk, Russia
3	National Research Center “Kurchatov Institute”, Moscow, Russia

Funding (1)

Council for Grants of the President of the Russian Federation

НШ-5340.2014.3

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.

Pakharukov I.Y. , Bukhtiyarov V.I. , Chetyrin I.A. , Prosvirin I.P. , Parmon V.N. , Murzin Y.V. , Zubavichus Y.V.
In-situ XPS and XAS Studies of a New Phenomenon of Kinetic Hysteresis in Selective Methane Oxidation over Platinum
In compilation EuropaCat XII. Catalysis: Balancing the use of fossil and renewable resources. XII European Congress on Catalysis, Kazan (Russia), 30 August - 4 September, 2015 : Book of Abstracts. – BIC SB RAS., 2015. – C.2098-2099. – ISBN 978-5-906376-10-7.

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