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Ethanol selective oxidation into syngas over Pt-promoted fluorite-like oxide: SSITKA and pulse microcalorimetry study
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Simonov, M. N., Sadykov, V. A., Rogov, V. A., Bobin, A. S., Sadovskaya, E. M., Mezentseva, N. V., Ishchenko, A. V., Krieger, T. A., Roger, A.-C. and van Veen, André C. (2016) Ethanol selective oxidation into syngas over Pt-promoted fluorite-like oxide: SSITKA and pulse microcalorimetry study. Catalysis Today, 278 . pp. 157-163. doi:10.1016/j.cattod.2016.05.005 ISSN 0920-5861.
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Official URL: http://dx.doi.org/10.1016/j.cattod.2016.05.005
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 CC bond rupture in ethanol/acetaldehyde molecules, while CH 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 the oxide sites to Pt provides conjugation between these steps, thus suppressing coking.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
Journal or Publication Title: | Catalysis Today | ||||||||
Publisher: | Elsevier BV | ||||||||
ISSN: | 0920-5861 | ||||||||
Official Date: | 1 December 2016 | ||||||||
Dates: |
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Volume: | 278 | ||||||||
Page Range: | pp. 157-163 | ||||||||
DOI: | 10.1016/j.cattod.2016.05.005 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Funder: | Commission of the European Communities | ||||||||
Grant number: | BIOGO (NMP-LA-2009-604296) |
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