In situ preparation of a La1.2Sr0.8Mn0.4Fe0.6O4 Ruddlesden–Popper phase with exsolved Fe nanoparticles as an anode for SOFCs

Chung, Yong Sik; Kim, Tae-Wook; Shin, Tae Ho; Yoon, Heechul; Park, Seongmin; Sammes, Nigel M.; Kim, Won; Chung, Jong Shik

doi:10.1039/c6ta09692a

Cited by 106 publications

(56 citation statements)

References 70 publications

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“…4c and Table S4). single cells with various high-performance anodes at 850 o C. 25,34,38,59,68,[71][72][73][74] All of the anode layers in (c) were screen-printed on the electrolyte layers. The thicknesses of the anode layers were generally 30-40 μm, which were sintered at 950-1050 o C.…”

Section: Electrical Conductivitymentioning

confidence: 99%

A-Site Ordered Double Perovskite with in Situ Exsolved Core–Shell Nanoparticles as Anode for Solid Oxide Fuel Cells

Hou

Yao

et al. 2019

ACS Appl. Mater. Interfaces

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A highly active anode material for solid oxide fuel cells resistant to carbon deposition is developed. Co-Fe co-doped La0.5Ba0.5MnO3-δ with a cubic-hexagonal heterogeneous stucture is synthesized through the pechini method. An A-site ordered double perovskite with Co0.94Fe0.06 alloyoxide core-shell nanoparticles on its surface is formed after reduction. The phase transition and the exsolution of the nanoparticles are investigated with X-ray diffraction, thermogravimetric analysis and high-resolution transmission electron microscope. The exsolved nanoparticles with the layered double perovskite supporter show a high catalytic activity. A single cell with that anode and a 300 μm-thick La0.8Sr0.2Ga0.8Mg0.2O3-δ electrolyte layer exhibits maximum power densities of 1479 and 503 mW cm -2 at 850 o C with wet hydrogen and wet methane fuels, respectively. Moreover, the single cell fed with wet methane exhibits a stable power output at 850 o C for 200 h, demonstrating a high resistance to carbon deposition of the anode due to the strong anchor of the exsolved nanoparticles on the perovskite parent. The oxide shell also preserves the metal particles from coking.

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Section: Electrical Conductivitymentioning

confidence: 99%

A-Site Ordered Double Perovskite with in Situ Exsolved Core–Shell Nanoparticles as Anode for Solid Oxide Fuel Cells

Hou

Yao

et al. 2019

ACS Appl. Mater. Interfaces

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“…[3,4] In particular, the conventional cermet based on nickel and yttria-stabilized zirconia (Ni/YSZ) still presents many issues as SOFC anode material. [5,6] Therefore, one of the current interests in this field is the search for new materials that can solve these problems in the cells and allow its proper operation.…”

Section: Introductionmentioning

confidence: 99%

Nickel Exsolution‐Driven Phase Transformation from an n=2 to an n=1 Ruddlesden‐Popper Manganite for Methane Steam Reforming Reaction in SOFC Conditions

et al. 2019

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An original way to perform the exsolution of Ni nanoparticles on a ceramic support was explored for the development of methane steam reforming catalyst in SOFC anode conditions. The n=2 Ruddlesden‐Popper (RP) phase La1.5Sr1.5Mn1.5Ni0.5O7±δ has been synthesized by the Pechini method and subsequently reduced with an H2‐N2 mixture at different temperatures and reducing times to induce the formation of two phases: LaSrMnO4 (n=1 RP) decorated with metallic Ni nanoparticles. Preliminary measurements of catalytic behavior for the steam reforming have been carried out in a reduction‐reaction process with a mixture of 82 mol %CH4, 18 mol %N2 and low steam to carbon ratio (S/C=0.15). The catalyst exhibits a selectivity for CO production (0.97), 14.60 mol % CH4 conversion and around 24.19 mol % H2 production. Such catalytic behavior was maintained for more than 4 h, with a constant rate of hydrogen production and CH4 conversion rate.

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“…As the anode of solid oxide fuel cell is adjacent to the electrolyte and the bipolar plate, the dramatic phase change of the perovskite will cause additional expansion/contraction and thus destroy the integrity of other components 33 . The unit cell of the oxides at room temperature before and after the reduction process was calculated and presented in Table 1, where one can see that the volumetric expansion due to the reduction process is under 1 %.…”

Section: (A)mentioning

confidence: 99%

A B-site doped perovskite ferrate as an efficient anode of a solid oxide fuel cell with in situ metal exsolution

Zeng

et al. 2019

J. Mater. Chem. A

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In situ preparation of a La_1.2Sr_0.8Mn_0.4Fe_0.6O₄ Ruddlesden–Popper phase with exsolved Fe nanoparticles as an anode for SOFCs

Abstract: In situ reduction of LSMF perovskite promoted Ruddlesden–Popper RPLSMF formation with Fe nanoparticles, exhibiting outstanding electrochemical performance as a SOFC electrode.

Cited by 106 publications

References 70 publications

A-Site Ordered Double Perovskite with in Situ Exsolved Core–Shell Nanoparticles as Anode for Solid Oxide Fuel Cells

A-Site Ordered Double Perovskite with in Situ Exsolved Core–Shell Nanoparticles as Anode for Solid Oxide Fuel Cells

Nickel Exsolution‐Driven Phase Transformation from an n=2 to an n=1 Ruddlesden‐Popper Manganite for Methane Steam Reforming Reaction in SOFC Conditions

A B-site doped perovskite ferrate as an efficient anode of a solid oxide fuel cell with in situ metal exsolution

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