Phase evolution and reactivity of Pr2NiO4+δ and Ce0.9Gd0.1O2-δ composites under solid oxide cell sintering and operation temperatures

Tsai, Chen-Yu; McGilvery, Catriona M.; Aguadero, Ainara; Skinner, Stephen J.

doi:10.1016/j.ijhydene.2019.10.011

Cited by 10 publications

(15 citation statements)

References 18 publications

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“…Further complexity is observed when RPO undergo phase changes during electrolysis, which can permanently alter surface interactions through reconstruction [10] . Literature reports reveal that the catalytic activity of nickelate compositions is sensitive to environment, and composition [11] . Exsolution of B‐site cations occurs under elevated temperature and partial pressure resulting in nickel alloy nanoparticles at the catalyst‐substrate interface [10] .…”

Section: Introductionmentioning

confidence: 99%

“…Exsolution of B‐site cations occurs under elevated temperature and partial pressure resulting in nickel alloy nanoparticles at the catalyst‐substrate interface [10] . Under an atmosphere of oxygen the reversible formation of higher order Ruddlesden‐Popper oxides was observed as a key phase affecting ORR activity [11,12] . The pH of the electrolysis also affects the stability of perovskite type catalysts [13] .…”

Section: Introductionmentioning

confidence: 99%

“…[10] Literature reports reveal that the catalytic activity of nickelate compositions is sensitive to environment, and composition. [11] Exsolution of B-site cations occurs under elevated temperature and partial pressure resulting in nickel alloy nanoparticles at the catalyst-substrate interface. [10] Under an atmosphere of oxygen the reversible formation of higher order Ruddlesden-Popper oxides was observed as a key phase affecting ORR activity.…”

Section: Introductionmentioning

confidence: 99%

“…[10] Under an atmosphere of oxygen the reversible formation of higher order Ruddlesden-Popper oxides was observed as a key phase affecting ORR activity. [11,12] The pH of the electrolysis also affects the stability of perovskite type catalysts. [13] Cations are often substituted to influence e g orbital filling in the octahedral B-sites.…”

Section: Introductionmentioning

confidence: 99%

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How Cation Substitutions Affect the Oxygen Reduction Reaction on La_2−xSr_xNi_1−yFe_yO₄

2022

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The atomic proximity of two disparate structural motifs in interleaved structures such as that adopted by La2NiO4, which alternates rock salt and perovskite motifs, offers potential synergistic effects and increased tunability for electrocatalyst behavior. Structural and voltammetric analysis of the intersecting composition series LaSrNi1−yFeyO4+δ and La2−xSrxNi0.7Fe0.3O4+δ show that tuning different cation sites uniquely affects structure and behavior. Correlations between X‐ray diffraction and Raman spectroscopy results reveal that structural changes in the a‐b plane are uniformly matched by the c‐axis following La−Sr exchange, while Ni−Fe exchange distorts the structure by expanding the crystal c‐axis and generating oxygen defects with a distinct signature in Raman spectra. Correlations between rotating ring‐disk electrode voltammetry results and structural parameters show that only Fe substitution has a direct effect on the electrocatalytic oxygen reduction reaction. We link systematic changes observed for onset of electrocatalytic oxygen reduction reaction, Tafel slope, and selectivity to distortions in the B‐site environments. This analysis demonstrates that correlational analysis linking electrochemical behavior parameters to multiple structural characterization techniques is an effective means to probe the effect of individual compositional substitution on electrocatalytic behavior.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

How Cation Substitutions Affect the Oxygen Reduction Reaction on La_2−xSr_xNi_1−yFe_yO₄

2022

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“…If these results are compared with previous reports [52] on Pr2NiO4-δ electrode (Rp at 600 ºC; 0.83 Ω•cm 2 [53] and 0.28 Ω•cm 2 [52]), the present LPNCO electrode exhibits lower performance, indicating that further improvement in the electrode microstructure should be done. Despite presenting a good performance, the stability of Pr2NiO4-δ has been questioned [24,25,54] under realistic operating conditions. Therefore, LPNCO electrode ,exhibiting higher stability [33], seems to be a better cathode candidate for IT-SOFC.…”

Section: Electrochemical Impedance Spectroscopy Measurements 3131 Tem...mentioning

confidence: 99%

Tailoring La2-XAXNi1-YBYO4+δ cathode performance by simultaneous A and B doping for IT-SOFC

Navarrete

Fabuel

Yoo

et al. 2020

International Journal of Hydrogen Energy

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High‐Performing Perovskite/Ruddlesden‐Popper Fuel Electrode for High‐Temperature Steam Electrolysis

Alizad Farzin,

Khoshkalam,

Guo

et al. 2024

Advanced Energy Materials

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Ruddlesden‐Popper (RP) oxides have emerged as a promising alternative to Ni cermet electrodes for high‐temperature steam electrolysis due to their superior oxide ion mobility and conductivity. Combining RP with perovskite (P) can provide superior electrocatalytic activity toward hydroxide oxidation and reduction reaction, driving higher efficiency in solid oxide cells (SOC). This work provides a novel approach to enhancing SOC performance by employing A‐site Ce‐substituted Sr0.6Pr0.4‐xCexMnO3 (x = 0.1‐0.3) electrodes, investigating their phase evolution, crystal properties, and cation oxidation states under oxidizing and reducing atmospheres. X‐ray diffraction analysis of heat‐treated powder in a reducing atmosphere revealed forming mixed P and RP structures at 600–800 °C for x = 0.1 and 0.2, which provides excellent conductivity and electrocatalytic activity. Consequently, outstanding cell performance is achieved, with low polarization resistances of 0.053 ± 0.004 Ω cm2 at 800 °C. The voltage response at different current densities in an electrolyte‐supported cell revealed a high power density of 1.084 W cm−2 in fuel cell operation and a current density of 1.00 A cm−2 at the thermoneutral voltage at 850 °C in steam electrolysis. Moreover, a low overpotential degradation rate of 45 mV kh−1 demonstrated the remarkable potential of the SPCM electrode as a promising Ni‐free candidate for SOC application.

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Phase evolution and reactivity of Pr2NiO4+δ and Ce0.9Gd0.1O2-δ composites under solid oxide cell sintering and operation temperatures

Cited by 10 publications

References 18 publications

How Cation Substitutions Affect the Oxygen Reduction Reaction on La_2−xSr_xNi_1−yFe_yO₄

How Cation Substitutions Affect the Oxygen Reduction Reaction on La_2−xSr_xNi_1−yFe_yO₄

Tailoring La2-XAXNi1-YBYO4+δ cathode performance by simultaneous A and B doping for IT-SOFC

High‐Performing Perovskite/Ruddlesden‐Popper Fuel Electrode for High‐Temperature Steam Electrolysis

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Phase evolution and reactivity of Pr2NiO4+δ and Ce0.9Gd0.1O2-δ composites under solid oxide cell sintering and operation temperatures

Cited by 10 publications

References 18 publications

How Cation Substitutions Affect the Oxygen Reduction Reaction on La2−xSrxNi1−yFeyO4

How Cation Substitutions Affect the Oxygen Reduction Reaction on La2−xSrxNi1−yFeyO4

Tailoring La2-XAXNi1-YBYO4+δ cathode performance by simultaneous A and B doping for IT-SOFC

High‐Performing Perovskite/Ruddlesden‐Popper Fuel Electrode for High‐Temperature Steam Electrolysis

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Product

Resources

About

How Cation Substitutions Affect the Oxygen Reduction Reaction on La_2−xSr_xNi_1−yFe_yO₄

How Cation Substitutions Affect the Oxygen Reduction Reaction on La_2−xSr_xNi_1−yFe_yO₄