Evaluation of double perovskite Sr2FeTiO6−δ as potential cathode or anode materials for intermediate-temperature solid oxide fuel cells

Li, Weidong; Cheng, Ye; Zhou, Qingjun; Wei, Tong; Li, Zepeng; Yan, Huiyu; Wang, Zheng; Han, Xue

doi:10.1016/j.ceramint.2015.06.074

Cited by 36 publications

(6 citation statements)

References 67 publications

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“…The obtained thermal expansion coefficient (TEC) value of SBFT is 12.8 × 10 –6 K –1 in the range of 100–900 °C. The average TEC value of SBFT is much lower than those of perovskite oxides such as GdBaFe 2 O 5+δ , Sr 2 FeTiO 6−δ , and Sr 2 FeMoO 6−δ , but very close to those of the LSGM (11.1 × 10 –6 K –1 ) and SDC (12.0 × 10 –6 K –1 ) electrolytes.…”

Section: Resultsmentioning

confidence: 76%

In Situ Coexsolution of Metal Nanoparticle-Decorated Double Perovskites As Anode Materials for Solid Oxide Fuel Cells

Sun

Jin

Liu

et al. 2021

ACS Appl. Energy Mater.

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Because of the excellent catalytic activity of nanoparticles, their in situ exsolution on perovskite surfaces has received extensive attention in the field of catalysis. Herein, a unique A- and B-site coexsolved double perovskite, SrBiFeTiO6−δ (SBFT), is used as an anode material in a solid oxide fuel cell (SOFC). A study of its crystal structure confirmed that the cubic structure of the SBFT perovskite has reasonable structural stability under a hydrogen (H2) atmosphere, even though metallic Bi and Fe exsolve from the perovskite lattice. Electrical conductivity results show that the exsolved nanoparticles improve the conductivity of the perovskite. X-ray photoelectron spectroscopy results indicate that the SBFT surface features Ti3+/4+, Fe3+/2+/0, Bi3+/0, and Sr2+ valence states. The output peak power densities of a single cell with SBFT–Ce0.8Sm0.2O1.9 as an anode are 280 and 503 mW cm–2 in ethanol and under a H2 atmosphere at 800 °C, respectively. In ethanol, at 800 °C, the fuel cell is relatively stable for over 30 h under a voltage of 0.5 V. All of the results show that the coexsolving of elements on a perovskite is a promising material design approach for creating SOFC anodes that have excellent properties.

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Section: Resultsmentioning

confidence: 76%

In Situ Coexsolution of Metal Nanoparticle-Decorated Double Perovskites As Anode Materials for Solid Oxide Fuel Cells

Sun

Jin

Liu

et al. 2021

ACS Appl. Energy Mater.

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“…182 Table 4 shows summary of the most important properties of selected IT-SOFC double perovskite cathodes. 152,156–165,167,169–171,175–180,186,197,220,224,229–241…”

Section: Double Perovskite-type Structure Sofc Cathodesmentioning

confidence: 99%

Recent advances, practical challenges, and perspectives of intermediate temperature solid oxide fuel cell cathodes

et al. 2022

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“…The obtained XRD spectra for STF are similar to the one obtained reported in the literature. 55 The XRD patterns of 2.5% Co/STF, 5% Co/STF, 7.5% Co/STF, and 10% Co/STF can be seen in Figure 3. A minor peak shift can be observed for all the Co impregnated compositions while no peak broadening is observed, as can be seen in the inset image of Figure 3 which shows the zoomed-in image of the (110) major peak.…”

Section: Materials Physicochemical Propertiesmentioning

confidence: 99%

Synthesis of cobalt loaded double perovskite Sr ₂ TiFeO ₆ _‐δ ( STF ) as a stable catalyst for enhanced hydrogen production via methane decomposition

et al. 2021

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In this study, cobalt (Co) loaded Sr 2 TiFeO 6-δ (STF) double perovskite was synthesized using a modified nitrate combustion method for the application in catalytic decomposition of methane (CH 4 ) for hydrogen (H 2 ) production in a fixed bed reactor. The physicochemical properties of the catalyst were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), energydispersive X-ray spectroscopy, N 2 adsorption-desorption, thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy. The catalyst showed a stable crystalline behavior with a uniform dispersion of Co over STF. The different compositions with varying Co loading were tested for methane decomposition at 850 C and constant flow rate. The 5% Co/STF achieving a maximum CH 4 conversion of ~95% with an H 2 yield of ~49%. Five percentage Co/STF showed excellent catalytic activity and stability for 46.5 hours time on stream without any indication of performance degradation. The spent catalyst was also analyzed using XRD, SEM, and TGA. The carbon deposited is shaped as carbon nanotubes that are a byproduct and also assist in metal exsolution in high-temperature processes. The use of STF shows the excellent potential showed by perovskites, which are stable in reducing environments, as support materials for methane decomposition.

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Evaluation of double perovskite Sr2FeTiO6−δ as potential cathode or anode materials for intermediate-temperature solid oxide fuel cells

Cited by 36 publications

References 67 publications

In Situ Coexsolution of Metal Nanoparticle-Decorated Double Perovskites As Anode Materials for Solid Oxide Fuel Cells

In Situ Coexsolution of Metal Nanoparticle-Decorated Double Perovskites As Anode Materials for Solid Oxide Fuel Cells

Recent advances, practical challenges, and perspectives of intermediate temperature solid oxide fuel cell cathodes

Synthesis of cobalt loaded double perovskite Sr ₂ TiFeO ₆ _‐δ ( STF ) as a stable catalyst for enhanced hydrogen production via methane decomposition

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Evaluation of double perovskite Sr2FeTiO6−δ as potential cathode or anode materials for intermediate-temperature solid oxide fuel cells

Cited by 36 publications

References 67 publications

In Situ Coexsolution of Metal Nanoparticle-Decorated Double Perovskites As Anode Materials for Solid Oxide Fuel Cells

In Situ Coexsolution of Metal Nanoparticle-Decorated Double Perovskites As Anode Materials for Solid Oxide Fuel Cells

Recent advances, practical challenges, and perspectives of intermediate temperature solid oxide fuel cell cathodes

Synthesis of cobalt loaded double perovskite Sr 2 TiFeO 6 ‐δ ( STF ) as a stable catalyst for enhanced hydrogen production via methane decomposition

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Synthesis of cobalt loaded double perovskite Sr ₂ TiFeO ₆ _‐δ ( STF ) as a stable catalyst for enhanced hydrogen production via methane decomposition