Concurrent surface and bulk modification of ceria-based cathodic catalyst for CO_(2)reduction in solid oxide electrolysis cell under strong polarization conditionsOA
High-temperature solid oxide electrolysis cells(SOECs)offer high energy efficiency and environmental compatibility for CO_(2)conversion but currently face the critical challenges of phase instability and coke formation,especially under the strong polarization conditions.In this study,redox phase-stable CeO_(2)cathode materials were modified by co-doping with Mn and Ni,enabling the in situ formation of self-assembled and strongly coupled metal Ni/ceria heterostructures and the modification of bulk properties by increasing redox Ce^(3+)active site numbers,Ni exsolution,oxygen defect concentrations,and electrical properties,which consequently effectively enhanced surface reaction kinetics and electrode series conductivity.The optimized Mn–Ni codoped ceria(CMN)exhibited stable electrochemical performance for nearly 140 h at 750℃with minimal degradation under mild electrolysis conditions.Under strong polarization(2.0 V)condition,SOECs based on the CMN electrode delivered an impressive current density of 3.05 A∙cm^(−2)at 800℃,accompanied by reliable operational stability over the state-of-the-art Ni-based cermet and widely investigated perovskite oxide cathode catalysts.These findings underscore the synergistic benefits of transition metal codoping and in situ heterostructure engineering in enabling high-performance,carbon-tolerant ceria-based electrodes for SOEC operation under both moderate and harsh operating conditions,advancing practical application.
Yongjian Chen;Ciyuan Deng;Wanying Luo;Hongming Ye;Rui Yang;Manish Singh;Te-Wei Chiu;Liangdong Fan
Shenzhen Key Laboratory of New Lithium-ion Batteries and Mesoporous Materials,Department of New Energy Science and Technology,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,ChinaShenzhen Key Laboratory of New Lithium-ion Batteries and Mesoporous Materials,Department of New Energy Science and Technology,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,ChinaShenzhen Key Laboratory of New Lithium-ion Batteries and Mesoporous Materials,Department of New Energy Science and Technology,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,ChinaShenzhen Key Laboratory of New Lithium-ion Batteries and Mesoporous Materials,Department of New Energy Science and Technology,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,ChinaShenzhen Key Laboratory of New Lithium-ion Batteries and Mesoporous Materials,Department of New Energy Science and Technology,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,ChinaDepartment of Metallurgical and Materials Engineering,Indian Institute of Technology Patna,Bihta 801106,IndiaDepartment of Materials and Mineral Resources Engineering,"National"Taipei University of Technology,Taipei 106,Taiwan,China Institute of Materials Science and Engineering,“National”Taipei University of Technology,Taipei 106,Taiwan,ChinaShenzhen Key Laboratory of New Lithium-ion Batteries and Mesoporous Materials,Department of New Energy Science and Technology,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,China
化学化工
solid oxide electrolysis cells(SOECs)CO_(2)reductionself-assemblystrong polarization conditionsceria(CeO_(2))
《Journal of Advanced Ceramics》 2026 (1)
P.187-198,12
supported by the National Natural Science Foundation of China(No.22378268)the Guangdong Basic and Applied Basic Research Foundation(No.2024A1515012212)the Shenzhen University-National Taipei University of Technology Joint Research Program(Nos.2026008 and 2023011)The authors also acknowledge the Instrumental Analysis Center of Shenzhen University(Xili Campus),the Electron Microscopy Centre of Shenzhen University.
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