Boosting catalytic and CO2 adsorption ability by in situ Cu nanoparticle exsolution for solid oxide electrolysis cell cathode |
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| Affiliation: | 1. Advanced Materials Center, Institute of Nanotechnology and Materials Engineering, Gdańsk University of Technology, 11/12 G. Narutowicza Street, 80-233, Gdańsk, Poland;2. Department of Built Environment and Energy Technology, Linnaeus University, 35195, Växjö, Sweden;1. School of Materials and Energy, Southwest University, Chongqing, 400715, China;2. College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China;1. Key Laboratory of Automobile Materials, Ministry of Education and Department of Materials Science and Engineering, Jilin University, Renmin Street NO. 5988, Changchun, Jilin Province, 130025, PR China;2. School of Mechanical and Aerospace Engineering, Jilin University, Renmin Street NO. 5988, Changchun, Jilin Province, 130025, PR China;3. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, PR China;1. School of Materials Science and Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo, 255049, Shandong, People''s Republic of China;2. Department of Mathematics, Zibo Normal College, 99 Tangjun-ouling Road, Zibo, 255130, Shandong, People''s Republic of China;3. School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai, 201804, Shanghai, People''s Republic of China;1. College of Chemistry and Materials Science, Longyan University, Longyan, Fujian, 364000, China;2. College of Materials Science and Engineering, Liaocheng University, Liaocheng, Shandong, 252000, China;3. School of Mathematics and Information Engineering, Longyan University, Longyan, Fujian, 364000, China |
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| Abstract: | Solid oxide electrolysis cell (SOEC) is recognized as an effective means to accomplish sustainable development since it is an efficient electrochemical technology for CO2 emission reduction. However, the electrocatalytic reduction activity of the cathode for CO2 restricts the development of SOEC. Herein, an A-site deficient perovskite Sr1·9Fe1·3Cu0·2Mo0·4Ti0·1O6-δ (SFCMT) was proposed as cathode material that can in situ exsolve uniform Cu nanoparticles. The exsolution of Cu increases the concentration of oxygen vacancies and provides abundant adsorption sites for CO2, resulting in excellent electrochemical catalytic capacity. Cu@SFCMT-based single cells exhibit excellent electrolytic performance under pure CO2, with current densities up to 3.21 A cm−2 at 1.8 V and 800 °C and interface polarization resistance (Rp) as low as 0.20 Ω cm2 at 800 °C. Furthermore, the current density changes slightly after the 140 h stability test at 1.2 V. Cu@SFCMT exhibits outstanding electrochemical activity and durability, making it a viable SOEC cathode material. |
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| Keywords: | Solid oxide electrolysis cell Cathode In situ exsolution Perovskite |
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