Ethanol and carbon dioxide catalyst reaction mechanism in anode and the operation stability of T-SOFC with NFCO reforming catalyst (IMAGE)

Tsinghua University Press

Ethanol and carbon dioxide catalyst reaction mechanism in anode and the operation stability of T-SOFC with NFCO reforming catalyst

Caption

Mechanism of R-NFCO catalyzed C2H5OH-CO2 fuel reforming: Ethanol fuel molecules adsorb and decompose on the surface of NiFe alloy, undergo cracking reforming reaction to generate synthesis gas, and then be transported to the three-phase boundary oxidation through porous anode. CeO2 oxygen vacancies can adsorb H2O and react with carbon deposition, effectively inhibiting carbon deposition. The cell with R-NFCO reforming layer under 700 ℃ and 10% C2H5OH-CO2 conditions remained stable during 100 h, while the performance of the cell without reforming layer deteriorated significantly. DFT calculations confirm NiFe-CeO2 heterostructure enhances H2O adsorption, promotes fuel conversion, improves reforming efficiency and inhibits carbon deposition.

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Journal of Advanced Ceramics, Tsinghua University Press

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