Solid oxide fuel cells(SOFCs)can directly convert renewable biogas into electricity with high efficiency at high temperature,however the long-term stability of SOFCs is significantly affected by the carbon deposition ...Solid oxide fuel cells(SOFCs)can directly convert renewable biogas into electricity with high efficiency at high temperature,however the long-term stability of SOFCs is significantly affected by the carbon deposition on the anode during cell operation.Herein,we report a novel carbon removal approach by high temperature infrared light driven photocatalytic oxidation.Upon the comparison of electrochemical performance of Ni-YSZ anode and TiO_(2)modified Ni-YSZ anode in the state-of-the-art single cell(Ni-YSZ/YSZ/LSCM),the modified anodes exhibit markedly improved peak powder density with simulated biogas fuel(70%CH_(4)+30%CO_(2))at 850℃with less coking after 40 h operation.The high activity and carbon deposition resistance of the modified anode is possibly attributed to the in situ generated hydroxyl radical from the reduced TiO_(x)powder under high temperature infrared light excitation,which is supported by detailed analysis of microstructural information of anodes and the powder-based thermo-photocatalytic experiments.展开更多
基金supported by Shenzhen Science and Technology Innovation Commission(No.JCYJ20190813171403664)Basic research program of Guangdong Province(No.2018A030313851)+1 种基金Longgang District Technology Supporting Project(No.LGKCKJPT2019074)the Fundamental Research Funds for the Central Universities(No.HIT.NSRIF.2020074).
文摘Solid oxide fuel cells(SOFCs)can directly convert renewable biogas into electricity with high efficiency at high temperature,however the long-term stability of SOFCs is significantly affected by the carbon deposition on the anode during cell operation.Herein,we report a novel carbon removal approach by high temperature infrared light driven photocatalytic oxidation.Upon the comparison of electrochemical performance of Ni-YSZ anode and TiO_(2)modified Ni-YSZ anode in the state-of-the-art single cell(Ni-YSZ/YSZ/LSCM),the modified anodes exhibit markedly improved peak powder density with simulated biogas fuel(70%CH_(4)+30%CO_(2))at 850℃with less coking after 40 h operation.The high activity and carbon deposition resistance of the modified anode is possibly attributed to the in situ generated hydroxyl radical from the reduced TiO_(x)powder under high temperature infrared light excitation,which is supported by detailed analysis of microstructural information of anodes and the powder-based thermo-photocatalytic experiments.
