Co nanoparticles decorated with in-situ exsolved oxygen-storage CeO2 for an efficient and stable electrolysis of pure CO2

Lu, Lanying; He, Debo; Fang, Ruiqi; Ni, Chengsheng; Irvine, John T. S.

doi:10.1016/j.jpowsour.2023.233424

Cited by 3 publications

(1 citation statement)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Partial replacement of the A-site element with Sr is a common strategy to improve oxygen permeability by introducing oxygen vacancies for the transport of oxide ions in order to enlarge the reaction area. − In this research, the doping Sr at the A-site of PrCrO 3 was found to create SrCrO 4 in air besides the parent perovskite phase and then the composite is used for the fuel electrode of an RSOC to evaluate the electrocatalysis of the (Pr, Sr)CrO 3 fuel electrode containing SrCrO 3−δ from SrCrO 4 . The in situ production of metallic SrCrO 3−δ with oxygen vacancies would increase the activation of H 2 oxidation and H 2 O under an anodic and cathodic bias, repetitively.…”

Section: Introductionmentioning

confidence: 99%

Sr-Doped PrCrO₃ with Intelligent SrCrO_x Cocatalyst for the Fuel Electrode of Reversible Solid Oxide Cells

Hu,

Wang,

et al. 2024

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

Reversible solid oxide cells (RSOCs) are energyconversion devices that can convert electricity into chemical energy and vice versa. The working environment of the fuel electrode would vary significantly between the two modes and the design of an efficient and durable fuel electrode is urgent and demanding. In this work, Pr 1−x Sr x CrO 3 (x = 0.2, 0.3) perovskites were explored, aiming to find proper fuel electrodes for a RSOC. A minor amount of SrCrO 4 was produced in Pr 0.8 Sr 0.2 CrO 3 (PS20C) and Pr 0.7 Sr 0.3 CrO 3 (PS30C) under oxygenation and can be reduced to SrCrO 3−δ by reduction in 5% H 2 . The polarization resistance (R p ) value of PS30C was significantly lower than PS20C (0.15 Ω cm 2 versus 2.11 Ω cm 2 ) at 800 °C and the higher performance of the PS30C fuel electrode could be related partially to the production of more metallic SrCrO 3−δ . A high performance was obtained in either fuel cell mode or electrolysis mode using a PS30C fuel electrode with the intelligent SrCrO x and the additional Ni infiltration does not enhance the performance. Ru infiltration into the PS30C further enhances the cell performance, imparting a peak power of 832 mW cm −2 as fuel cell and a current density of 1.19 A cm −2 at 1.3 V for steam electrolysis at 800 °C. The reversible switching at 0.6 V for H 2 oxidation and 1.3 V for steam electrolysis was tested for 12 cycles, and insignificant performance degradation was found for the PS30C cell with Ru infiltration. This work advances the development of PrCrO 3 perovskite with metallic oxide SrCrO x cocatalyst for high-performance RSOC fuel electrodes.

show abstract

Section: Introductionmentioning

confidence: 99%

Sr-Doped PrCrO₃ with Intelligent SrCrO_x Cocatalyst for the Fuel Electrode of Reversible Solid Oxide Cells

Hu,

Wang,

et al. 2024

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

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

Liu,

Shang,

Zhou

et al. 2024

Energy & Environ Materials

View full text Add to dashboard Cite

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 °C. Single electrolysis cells with the R‐PSFCM0.35 cathode display an outstanding current density of 2947 mA cm−2 at 850 °C and 1.6 V. In addition, the catalytic stability of the R‐PSFCM0.35 cathode is also proved by operating at 800 °C with an applied constant current density of 600 mA cm−2 for 100 h.

show abstract

Reinforced chemical adsorption ability for efficient CO2 electrolysis in solid oxide electrolysis cell via a dual-exsolution strategy

Wang,

Jin,

Zhao

et al. 2024

Chemical Engineering Journal

View full text Add to dashboard Cite

Co nanoparticles decorated with in-situ exsolved oxygen-storage CeO2 for an efficient and stable electrolysis of pure CO2

Cited by 3 publications

References 58 publications

Sr-Doped PrCrO₃ with Intelligent SrCrO_x Cocatalyst for the Fuel Electrode of Reversible Solid Oxide Cells

Sr-Doped PrCrO₃ with Intelligent SrCrO_x Cocatalyst for the Fuel Electrode of Reversible Solid Oxide Cells

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

Reinforced chemical adsorption ability for efficient CO2 electrolysis in solid oxide electrolysis cell via a dual-exsolution strategy

Contact Info

Product

Resources

About

Co nanoparticles decorated with in-situ exsolved oxygen-storage CeO2 for an efficient and stable electrolysis of pure CO2

Cited by 3 publications

References 58 publications

Sr-Doped PrCrO3 with Intelligent SrCrOx Cocatalyst for the Fuel Electrode of Reversible Solid Oxide Cells

Sr-Doped PrCrO3 with Intelligent SrCrOx Cocatalyst for the Fuel Electrode of Reversible Solid Oxide Cells

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

Reinforced chemical adsorption ability for efficient CO2 electrolysis in solid oxide electrolysis cell via a dual-exsolution strategy

Contact Info

Product

Resources

About

Sr-Doped PrCrO₃ with Intelligent SrCrO_x Cocatalyst for the Fuel Electrode of Reversible Solid Oxide Cells

Sr-Doped PrCrO₃ with Intelligent SrCrO_x Cocatalyst for the Fuel Electrode of Reversible Solid Oxide Cells

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