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

TIAN Jiayu ¹SUN Qi ¹LIU Pei ¹DAI Jiuyi ¹CAI Yezheng ¹XU Miao ²YE Tian-Nan ¹CHEN Jie-Sheng³

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作者信息

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

Abstract

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 CO2 and H2O 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 CO2 and H2O electrolysis at an extraordinary current density of 1.41 A/cm2 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 CO2 and H2O co-electrolysis in SOECs and improves the scalability and effectiveness of SOECs in renewable energy applications.

Key words

Cerium metal-organic framework/One-dimensional structure/Gadolinium doped ceria/CO2 activation/co-Electrolysis

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基金项目

National Natural Science Foundation of China(22275121)

National Natural Science Foundation of China(21931005)

National Natural Science Foundation of China(22105122)

National Natural Science Foundation of China(52272265)

National Key R&D Program of China(2023YFA1506300)

Shanghai Municipal Science and Technology Major Project of China()

Open Foundation Commission of Shaoxing Research Institute of Renewable Energy and Molecular Engineering,China(JDSX2022038)

Project of Jiangxi Academy of Sciences,China(2023YSTZX01)

出版年

2024

高等学校化学研究(英文版)

吉林大学

高等学校化学研究(英文版)

CSTPCD

影响因子：0.871

ISSN：1005-9040

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