MOF-derived 1D CGO Cathode for Efficient Solid Oxide Electrolysis Cells  

作　　者：TIAN Jiayu SUN Qi LIU Pei DAI Jiuyi CAI Yezheng XU Miao YE Tian-Nan CHEN Jie-Sheng 

机构地区：[1]Frontiers Science Center for Transformative Molecules,School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai,200240,P.R.China [2]Zhangjiang Institute for Advanced Study,Shanghai Jiao Tong University,Shanghai,200240,P.R.China [3]State Key Laboratory of Space Power-sources,Shanghai Institute of Space Power-sources,Shanghai,200245,P.R.China

出　　处：《Chemical Research in Chinese Universities》2024年第4期737-746,共10页高等学校化学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.22275121,21931005,22105122,52272265);the National Key R&D Program of China(No.2023YFA1506300);the Shanghai Municipal Science and Technology Major Project of China,the Open Foundation Commission of Shaoxing Research Institute of Renewable Energy and Molecular Engineering,China(No.JDSX2022038);the Project of Jiangxi Academy of Sciences,China(No.2023YSTZX01).

摘　　要：Solid oxide electrolysis cells(SOECs)provide a promising way for converting renewable energy into chemical fuels.Traditionally,NiO/CGO(nickel-gadolinium doped ceria)cermet has shown its excellent properties in ionic and electronic conductivity under reducing conditions.Herein,we developed a novel 1D NiO/CGO cathode through a cerium metal-organic framework(MOF)derived process.The cathode’s 1D nanostructure integrated with a microchannel scaffold facilitates enhanced mass transport,providing vertically aligned pathways for CO_(2)and H_(2)O diffusion.Additionally,the 1D framework increases the number of interfacial sites and reduces ion diffusion distances,thereby simplifying electron/ion transport.Consequently,this advanced cathode achieved a significant breakthrough in SOEC performance,maintaining efficient CO_(2)and H_(2)O electrolysis at an extraordinary current density of 1.41 A/cm^(2)at 1.5 V and excellent stability over 24 h at 850℃.The enhanced performance of this newly developed cathode not only achieves a remarkable 100%improvement compared to those of NiO/CGO cathodes with varying geometrical configurations but also surpasses those of commercial NiO/CGO catalysts by an outstanding 40%when tested under identical conditions.The development of the 1D NiO/CGO enhances the efficiency and durability of ceramic cathodes for CO_(2)and H_(2)O co-electrolysis in SOECs and improves the scalability and effectiveness of SOECs in renewable energy applications.

关 键 词：Cerium metal-organic framework One-dimensional structure Gadolinium doped ceria CO_(2)activation co-Electrolysis 

分 类 号：TG14[一般工业技术—材料科学与工程]