摘要
本文报道了一种适应于高效稳定的CO-CO_(2)相互转化的可逆固体氧化物电池(RSOC)相变燃料电极.该燃料电极由FeRu双金属纳米催化剂和Ruddlesden-Popper相Pr_(0.8)Sr_(1.2)Fe_(1-x-y)Ru_(x)Mo_(y)O_(4)氧化物复合而成(FeRu@PSFRM).固体氧化物燃料电池(SOFC)模式时,单电池800℃时的最大输出功率密度可以达到170 W cm^(-2);而在固体氧化物电解池(SOEC)模式下,800℃、1.3 V时电解池的电解电流密度达到-0.256 A cm^(-2).在SOFC-SOEC循环测试过程中,RSOC中CO-CO_(2)相互转化过程经历了“活化-稳定-衰退”三个明显阶段.幸运的是,性能衰退的燃料电极可通过“原位氧化-还原”处理实现性能再生,有效提升该电池的使用寿命.研究结果表明,原位脱溶形成的FeRu@PSFRM材料是一种极具应用潜力的燃料电极候选材料,以期实现高效稳定的CO-CO_(2)相互转化.
Herein,we report a phase-transformed fuel electrode to carry out the reversible CO-CO_(2)conversion in a reversible solid oxide electrochemical cell(RSOC),which is composed of self-assembled FeRu bimetallic nanoparticles and Ruddlesden-Popper Pr_(0.8)Sr_(1.2)Fe_(1-x-y)Ru_(x)Mo_(y)O_(4)(FeRu@PSFRM).Electrochemical impedance spectra and their corresponding distribution of relaxation time demonstrate that the sub-electrode reaction process in the frequency ranging 100-102 Hz,including the gas adsorption,dissociation,and ionization reactions on the electrode surface,predominantly dominates the entire electrode reaction process.The single cell with the FeRu@PSFRM fuel electrode generates a maximum output power density of 170 W cm^(-2)at 800℃in the solid oxide fuel cell(SOFC)mode,while yields a current density of-0.256 A cm^(-2)at 1.3 V in the solid oxide electrolysis cell(SOEC)mode.In addition,the reliable reversible CO-CO_(2)mutual conversion has experienced“activation-stabilization-degradation”three obvious stages in the first 42-h SOFC-SOEC cycling testing.Fortunately,the degraded fuel electrode can be regenerated by oxidizing it in the oxidizing gas and then retreating in the reductive atmosphere.Our findings reveal that the FeRu@PSFRM material generated by the in-situ exsolution technique is a promising fuel electrode candidate for efficient and durable mutual CO-CO_(2)conversion in a RSOC.
作者
王晶
张栋
刘通
徐安琪
罗瑶
胡学雷
王瑶
Jing Wang;Dong Zhang;Tong Liu;Anqi Xu;Yao Luo;Xuelei Hu;Yao Wang(Key Laboratory of Green Chemical Process of Ministry of Education,Hubei Key Laboratory of Novel Reactor and Green Chemical Technology,School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan,430205,China;School of Power and Mechanical Engineering,Wuhan University,Wuhan,430072,China)
基金
supported by the start-up research funds from Wuhan Institute of Technology(K202201)
Natural Science Foundation of Hubei Province of China(2024CFB755)
National Natural Science Foundation of China(U21A20317)
the Graduate Innovation Fund of Wuhan Institute of Technology(CX2023040)。
