Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Ethanol selective oxidation into syngas over Pt-promoted fluorite-like oxide : SSITKA and pulse microcalorimetry study. / Simonov, M. N.; Sadykov, V. A.; Rogov, V. A. и др.
в: Catalysis Today, Том 278, 01.12.2016, стр. 157-163.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Ethanol selective oxidation into syngas over Pt-promoted fluorite-like oxide
T2 - SSITKA and pulse microcalorimetry study
AU - Simonov, M. N.
AU - Sadykov, V. A.
AU - Rogov, V. A.
AU - Bobin, A. S.
AU - Sadovskaya, E. M.
AU - Mezentseva, N. V.
AU - Ishchenko, A. V.
AU - Krieger, T. A.
AU - Roger, A. C.
AU - van Veen, A. C.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - 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[sbnd]C bond rupture in ethanol/acetaldehyde molecules, while C[sbnd]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 the oxide sites to Pt provides conjugation between these steps, thus suppressing coking.
AB - 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[sbnd]C bond rupture in ethanol/acetaldehyde molecules, while C[sbnd]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 the oxide sites to Pt provides conjugation between these steps, thus suppressing coking.
KW - Ethanol
KW - Mechanism
KW - Microcalorimetry
KW - Partial oxidation
KW - SSITKA
KW - Syngas
UR - http://www.scopus.com/inward/record.url?scp=84992724497&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2016.05.005
DO - 10.1016/j.cattod.2016.05.005
M3 - Article
AN - SCOPUS:84992724497
VL - 278
SP - 157
EP - 163
JO - Catalysis Today
JF - Catalysis Today
SN - 0920-5861
ER -
ID: 25390256