Hydrocarbon fuels have the advantages of being low-cost,easy to store and transport,and can be converted into biomass gas through oxidation and reforming processes,further increasing their potential applications.Howev...Hydrocarbon fuels have the advantages of being low-cost,easy to store and transport,and can be converted into biomass gas through oxidation and reforming processes,further increasing their potential applications.However,incomplete reforming and carbon deposition under practical conditions hinder the utilization of hydrocarbon fuels.In this work,Ni_(0.1)Fe_(0.1)Ce_(0.8)O_(2−δ)(NFCO)is employed as the anode reforming catalyst for tubular solid oxide fuel cells(T-SOFCs)with low-concentration ethanol-carbon dioxide fuel.With the in situ-formed NiFe alloy,the T-SOFC with NFCO achieves peak power densities of 538,614,and 608 mW·cm^(−2)in 5%,10%,and 15%ethanol,respectively,which are higher than those of the cell without NFCO.More importantly,no significant degradation is observed during long-term operation.As confirmed by density functional theory(DFT)calculations,the introduction of a NiFe alloy on the basis of CeO_(2)significantly improved the adsorption energy of H2O,thereby increasing the adsorption capacity of water molecules and promoting the adsorption and conversion of ethanol fuel.The results indicate that the heterostructure between the NiFe alloy and high-oxygen-vacancy CeO_(2)enhances the anode catalytic activity and inhibits the carbon deposition of T-SOFCs under low-concentration ethanol-carbon dioxide fuel,providing important insights for the development of high-performance,carbon-tolerant T-SOFCs under direct hydrocarbon fuel.展开更多
基金the financial support provided by the National Key R&D Program of China(No.2024YFB4007501)the Natural Science Foundation of Jiangsu Province(No.BK20240109)+1 种基金the Fundamental Research Funds for the Central Universities(No.2024QN11045)the China Postdoctoral Science Foundation(No.2024M753513).
文摘Hydrocarbon fuels have the advantages of being low-cost,easy to store and transport,and can be converted into biomass gas through oxidation and reforming processes,further increasing their potential applications.However,incomplete reforming and carbon deposition under practical conditions hinder the utilization of hydrocarbon fuels.In this work,Ni_(0.1)Fe_(0.1)Ce_(0.8)O_(2−δ)(NFCO)is employed as the anode reforming catalyst for tubular solid oxide fuel cells(T-SOFCs)with low-concentration ethanol-carbon dioxide fuel.With the in situ-formed NiFe alloy,the T-SOFC with NFCO achieves peak power densities of 538,614,and 608 mW·cm^(−2)in 5%,10%,and 15%ethanol,respectively,which are higher than those of the cell without NFCO.More importantly,no significant degradation is observed during long-term operation.As confirmed by density functional theory(DFT)calculations,the introduction of a NiFe alloy on the basis of CeO_(2)significantly improved the adsorption energy of H2O,thereby increasing the adsorption capacity of water molecules and promoting the adsorption and conversion of ethanol fuel.The results indicate that the heterostructure between the NiFe alloy and high-oxygen-vacancy CeO_(2)enhances the anode catalytic activity and inhibits the carbon deposition of T-SOFCs under low-concentration ethanol-carbon dioxide fuel,providing important insights for the development of high-performance,carbon-tolerant T-SOFCs under direct hydrocarbon fuel.
