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Updated: Jun 21, 2026

Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Published on: June 21, 2017
V2O5 Surface Electronic Structure Suppresses Ethane Over-Oxidation, Enabling 65% Ethylene Yield
Hongjuan Tao1, Yan Chen1, Suting He1
1Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou, China.
Abstract:
Electrochemical oxidative dehydrogenation (ODH) of ethane in solid oxide electrolysis cells (SOECs) offers an energy-efficient route to ethylene but faces a trade-off between conversion and selectivity due to over-oxidation. Conventional voltage-current regulation can suppress deep oxidation but inevitably compromises ethane conversion. Here, we engineer surface electronic structures by depositing a V2O5 layer on SrFe0.9Ti0.1O3-δ (STF), introducing intrinsic O 2p (-1.33 eV) and V 3d (-0.18 eV) states closer to the Fermi level than in STF (-1.49/-4.52 eV). Density functional theory and operando infrared spectroscopy reveal three synergistic effects: enhanced ethane adsorption (ΔEads -0.33 vs. -0.11 eV), reduced first dehydrogenation barrier (ΔG1 1.13 vs. 1.15 eV), and promoted ethylene desorption ((ΔGdes-ΔG3) -4.98 vs. -1.92 eV). The optimized anode delivers 65% yield and 90% selectivity at 750°C, exceeding unmodified STF by 10%. This work highlights band-center engineering as a promising design concept for regulating hydrocarbon electrode reactions.
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