In situ exsolution of Ni particles on the PrBaMn2O5 SOFC electrode material monitored by high temperature neutron powder diffraction under hydrogen

Bahout, Mona; Managutti, Praveen B.; Dorcet, Vincent; Salle, Annie Le Gal La; Paofai, Serge; Hansen, Thomas C.

doi:10.1039/c9ta10159d

Cited by 23 publications

(35 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar effects have been observed in the electrodes of solid oxide fuel cells where nickel particles exsolved from nickel oxides. [47,48] Due to their small size, the Co nanoparticles are not observed in the XRD curves or STEM images.…”

Section: Figure 1(h)mentioning

confidence: 99%

Cation and anion topotactic transformations in cobaltite thin films leading to Ruddlesden-Popper phases

Chiu

Lee

Cheng

et al. 2021

Phys. Rev. Materials

View full text Add to dashboard Cite

Topotactic transformations involve structural changes between related crystal structures due to a loss or gain of material while retaining a crystallographic relationship. 2The perovskite oxide La0.7Sr0.3CoO3 (LSCO) is an ideal system for investigating phase transformations due to its high oxygen vacancy conductivity, relatively low oxygen vacancy formation energy, and strong coupling of the magnetic and electronic properties to the oxygen stoichiometry. While the transition between cobaltite perovskite and brownmillerite (BM) phases has been widely reported, further reduction beyond the BM phase lacks systematic studies. In this work, we study the evolution of the physical properties of LSCO thin films upon exposure to highly reducing environments. We observe the rarely-reported crystalline Ruddlesden-Popper (RP) phase, which involves the loss of both oxygen anions and cobalt cations upon annealing where the cobalt is found as isolated Co ions or Co nanoparticles. First principles calculations confirm that the concurrent loss of oxygen and cobalt ions is thermodynamically possible through an intermediary BM phase. The strong correlation of the magnetic and electronic properties to the crystal structure highlights the potential of utilizing ion migration as a basis for emerging applications such as neuromorphic computing.

show abstract

Section: Figure 1(h)mentioning

confidence: 99%

Cation and anion topotactic transformations in cobaltite thin films leading to Ruddlesden-Popper phases

Chiu

Lee

Cheng

et al. 2021

Phys. Rev. Materials

View full text Add to dashboard Cite

show abstract

“…Of the high practical importance, to eliminate the use of rare earth elements, is also the presented Cu/Mn-based stoichiometric spinel structure deposited on the Nb/Zr oxide support [17]. In addition, owing to their intrinsic high oxygen ion mobility, some of them have been recently considered for application as the electrode materials in solid oxide fuel cells [18][19][20][21]. However, for the efficient reduction process of the PSA-type oxygen storage materials, the hydrogen-containing atmosphere is required.…”

Section: Introductionmentioning

confidence: 99%

Oxygen separation from air by the combined temperature swing and pressure swing processes using oxygen storage materials Y1−x(Tb/Ce)xMnO3+δ

et al. 2020

View full text Add to dashboard Cite

Hexagonal Y1−xRxMnO3+δ (R: other than Y rare earth elements) oxides have been recently introduced as promising oxygen storage materials that can be utilized in the temperature swing processes for the oxygen separation and air enrichment. In the present work, the average and local structures of Tb- and Ce-substituted Y0.7Tb0.15Ce0.15MnO3+δ and Y0.6Tb0.2Ce0.2MnO3+δ materials were studied, and their oxygen storage-related properties have been evaluated. The fully oxidized samples show the presence of a significant amount of the highly oxygen-loaded the so-called Hex3 phase, attaining an average oxygen content of δ ≈ 0.41 for both compositions. Extensive studies of the temperature swing process conducted in air and N2 over the temperature range of 180–360 °C revealed large and reversible oxygen content changes taking place with only a small temperature differences and the high dependence on the oxygen partial pressure. Significant for practical performance, the highest reported for this class of compounds, oxygen storage capacity of 1900 μmol O g−1 in air was obtained for the optimized materials and swing process. In the combined temperature–oxygen partial pressure swing process, the oxygen storage capacity of 1200 μmol O g−1 was achieved.

show abstract

“…As well as infiltrated electrodes, the in situ exsolution method is another way to get nano-structure electrodes, which has also attracted a lot of attention in recent years [ 66 , 67 , 68 , 69 , 70 ]. Tan et al [ 67 ] (2018) achieved uniform-distributed nickel nanocatalyst on GDC surface using a thermally driven in situ exsolution method in the SOC system.…”

Section: Degradation Mechanism and Countermeasuresmentioning

confidence: 99%

Degradation Mechanisms of Metal-Supported Solid Oxide Cells and Countermeasures: A Review

et al. 2021

View full text Add to dashboard Cite

Metal-supported oxide cells (MSCs) are considered as the third-generation solid oxide cells (SOCs) succeeding electrolyte-supported (first generation) and anode-supported (second generation) cells, which have gained much attention and progress in the past decade. The use of metal supports and advanced technical methods (such as infiltrated electrodes) has vastly improved cell performance, especially with its rapid startup ability and power density, showing a significant decrease in raw materials cost. However, new degradation mechanisms appeared, limiting the further improvement of the performance and lifetime. This review encapsulates the degradation mechanisms and countermeasures in the field of MSCs, reviewing the challenges and recommendations for future development.

show abstract

In situ exsolution of Ni particles on the PrBaMn₂O₅ SOFC electrode material monitored by high temperature neutron powder diffraction under hydrogen

Abstract: NiO has been incorporated into the Pr0.5Ba0.5MnO3−δ perovskite to produce in situ exsolved Ni-catalyst on the PrBaMn2O5 anode material upon heating under a hydrogen atmosphere.

Cited by 23 publications

References 58 publications

Cation and anion topotactic transformations in cobaltite thin films leading to Ruddlesden-Popper phases

Cation and anion topotactic transformations in cobaltite thin films leading to Ruddlesden-Popper phases

Oxygen separation from air by the combined temperature swing and pressure swing processes using oxygen storage materials Y1−x(Tb/Ce)xMnO3+δ

Degradation Mechanisms of Metal-Supported Solid Oxide Cells and Countermeasures: A Review

Contact Info

Product

Resources

About