首页|Active Cu and Fe Nanoparticles Codecorated Ruddlesden-Popper-Type Perovskite as Solid Oxide Electrolysis Cells Cathode for CO2 Splitting

Active Cu and Fe Nanoparticles Codecorated Ruddlesden-Popper-Type Perovskite as Solid Oxide Electrolysis Cells Cathode for CO2 Splitting

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Solid oxide electrolysis cells(SOECs),displaying high current density and energy efficiency,have been proven to be an effective technique to electrochemically reduce CO2 into CO.However,the insufficiency of cathode activity and stability is a tricky problem to be addressed for SOECs.Hence,it is urgent to develop suitable cathode materials with excellent catalytic activity and stability for further practical application of SOECs.Herein,a reduced perovskite oxide,Pr0.35Sr0.6Fe0.7Cu0.2Mo0.1O3-δ(PSFCM0.35),is developed as SOECs cathode to electrolyze CO2.After reduction in 10％H2/Ar,Cu and Fe nanoparticles are exsolved from the PSFCM0.35 lattice,resulting in a phase transformation from cubic perovskite to Ruddlesden-Popper(RP)perovskite with more oxygen vacancies.The exsolved metal nanoparticles are tightly attached to the perovskite substrate and afford more active sites to accelerate CO2 adsorption and dissociation on the cathode surface.The significantly strengthened CO2 adsorption capacity obtained after reduction is demonstrated by in situ Fourier transform-infrared(FT-IR)spectra.Symmetric cells with the reduced PSFCM0.35(R-PSFCM0.35)electrode exhibit a low polarization resistance of 0.43 Ω cm2 at 850 ℃.Single electrolysis cells with the R-PSFCM0.35 cathode display an outstanding current density of 2947 mA cm-2 at 850 ℃ and 1.6 V.In addition,the catalytic stability of the R-PSFCM0.35 cathode is also proved by operating at 800 ℃ with an applied constant current density of 600 mA cm-2 for 100 h.

cathodeCO2 reductionnanoparticles decorationsolid oxide electrolysis cells

Dongliang Liu、Hang Shang、Chuan Zhou、Jie Miao、Daxiang Xue、Zeping Chen、Meijuan Fei、Fengli Liang、Qiang Niu、Ran Ran、Wei Zhou、Zongping Shao

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State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China

Suzhou Laboratory,Suzhou 215000,China

School of Environmental Science and Engineering,Nanjing Tech University,Nanjing 210009,China

Inner Mongolia Erdos Electric Power and Metallurgy Group Co.,Ltd.,Ordos 016064,China

Jiangsu Province Key Laboratory of Aerospace Power System,College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

WA School of Mines:Minerals,Energy and Chemical Engineering(WASM-MECE),Curtin University,Perth,WA 6102,Australia

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaInner Mongolia major science and technology project

22278203222790572021ZD0042

2024

10.1002/eem2.12717

能源与环境材料(英文)

能源与环境材料(英文)

ISSN：
年,卷(期)：2024.7(5)