In:
Angewandte Chemie, Wiley, Vol. 131, No. 45 ( 2019-11-04), p. 16189-16192
Abstract:
Oxidative dehydrogenation of ethane (ODE) is limited by the facile deep oxidation and potential safety hazards. Now, electrochemical ODE reaction is incorporated into the anode of a solid oxide electrolysis cell, utilizing the oxygen species generated at anode to catalytically convert ethane. By infiltrating γ‐Al 2 O 3 onto the surface of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3‐δ ‐Sm 0.2 Ce 0.8 O 2‐δ (LSCF‐SDC) anode, the ethylene selectivity reaches as high as 92.5 %, while the highest ethane conversion is up to 29.1 % at 600 °C with optimized current and ethane flow rate. Density functional theory calculations and in situ X‐ray photoelectron spectroscopy characterizations reveal that the Al 2 O 3 /LSCF interfaces effectively reduce the amount of adsorbed oxygen species, leading to improved ethylene selectivity and stability, and that the formation of Al‐O‐Fe alters the electronic structure of interfacial Fe center with increased density of state around Fermi level and downshift of the empty band, which enhances ethane adsorption and conversion.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v131.45
DOI:
10.1002/ange.201908388
Language:
English
Publisher:
Wiley
Publication Date:
2019
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