自组装FeRu双金属纳米催化剂在可逆固体氧化物电池中实现高效稳定的CO-CO2相互转化

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中文摘要：本文报道了一种适应于高效稳定的CO-CO2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 Pr0.8Sr1.2Fe1-x-yRuxMoyO4 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-CO2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-CO2相互转化.

外文标题：Self-assembled FeRu bimetallic nanocatalysts for efficient and durable mutual CO-CO2 conversion in a reversible solid oxide electrochemical cell

外文摘要：Herein,we report a phase-transformed fuel electrode to carry out the reversible CO-CO2 conversion in a reversible solid oxide electrochemical cell(RSOC),which is composed of self-assembled FeRu bimetallic nanoparticles and Ruddlesden-Popper Pr0.8Sr1.2Fe1-x-yRuxMoyO4(FeRu@PSFRM).Electrochemical impedance spectra and their corresponding distribution of relaxation time demonstrate that the sub-electrode reaction process in the frequency ran-ging 100-102 Hz,including the gas adsorption,dissociation,and ionization reactions on the electrode surface,pre-dominantly 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-CO2 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-CO2 conversion in a RSOC.

外文关键词：

Ruddlesden-Popper oxideCO-CO2 conversioncy-cling testperovskite oxidereversible solid oxide cellsdistribu-tion of relaxation timeselectrochemical impedance spectrafuel electrode

作者：

王晶、张栋、刘通、徐安琪、罗瑶、胡学雷、王瑶

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作者单位：

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

关键词：

Ruddlesden-Popper oxide CO-CO2 conversion cy-cling test perovskite oxide reversible solid oxide cells distribu-tion of relaxation times electrochemical impedance spectra fuel electrode

基金：

startup research funds from Wuhan Institute of TechnologyNatural Science Foundation of Hubei Province of ChinaNational Natural Science Foundation of ChinaGraduate Innovation Fund of Wuhan Institute of Technology

项目编号：

K2022012024CFB755U21A20317CX2023040

出版年：

2024

DOI：

10.1007/s40843-024-2922-8

中国科学:材料科学(英文)

CSTPCD

ISSN：

年,卷(期)：2024.67(5)

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