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Ethanol Selective Oxidation into Syngas over Pt-Promoted Fluorite-Like Oxide: SSITKA and Pulse Microcalorimetry Study Conference attendances

Language Английский
Participant type Устный
Conference EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources”
30 Aug - 4 Sep 2015 , Казань
Authors Simonov Mikhail Nikolaevich 1,2 , Sadykov Vladislav Aleksandrovich 1,2 , Rogov Vladimir Alekseevich 1,2 , Bobin Alexey Sergeyevich 1,2 , Sadovskaya Ekaterina Mikhajlovna 1,2 , Mezentseva Natalia Vasilievna 1,2 , Roger Anne-Cecile 3 , van Veen Andre C. 4
Affiliations
1 Boreskov Institute of Catalysis SB RAS
2 Novosibirsk National Research University
3 University of Strasbourg
4 University of Warwick

Abstract: Catalysts based on oxides with a high lattice oxygen mobility and reactivity are known to be able to efficiently transform ethanol into syngas by selective oxidation. Mechanism of this reaction over Pt/ Pr0.15Sm0.15Ce0.35Zr0.35O2 catalyst was studied by using SSITKA and pulse microcalorimetry. The rate–determining step is C-C bond rupture in ethanol/acetaldehyde molecules, while C-H bond breaking in the ethanol dehydrogenation step proceeds easily. The mechanism is described by step-wise red–ox scheme including ethanol oxidative decomposition on Pt sites with participation of bridging oxygen species (with the heat of adsorption ~ 550 kJ/mol O2) located at Pt-oxide interface followed by fast reoxidation of reduced support sites by O2. Rapid oxygen migration from oxide sites to Pt provides conjugation between these steps, thus suppressing coking
Cite: Simonov M.N. , Sadykov V.A. , Rogov V.A. , Bobin A.S. , Sadovskaya E.M. , Mezentseva N.V. , Roger A. , van Veen A.C.
Ethanol Selective Oxidation into Syngas over Pt-Promoted Fluorite-Like Oxide: SSITKA and Pulse Microcalorimetry Study
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” 30 Aug - 4 Sep 2015