How (Ba0.5Sr0.5)(Fe0.8Zn0.2)O3–δ and (Ba0.5Sr0.5)(Co0.8Fe0.2)O3–δ Perovskites Form via an EDTA/Citric Acid Complexing Method

Martynczuk, Julia; Arnold, Mirko; Wang, Haihui; Caro, Jürgen; Feldhoff, Armin

doi:10.1002/adma.200700322

Cited by 71 publications

(38 citation statements)

References 45 publications

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“…Therefore, despite of the formation of SrCO 3 phase, this method has been largely used in the preparation of perovskite-type mixed oxides, such as in Refs. [20][21][22]. In the present case, the SrCO 3 phase also has not been detected by XRD patterns and its influence on the reaction is neglected.…”

Section: Xrdmentioning

confidence: 93%

Perovskite-Like Mixed Oxides (LaSrMn1−x Ni x O4+δ, 0 ≤ x ≤ 1) as Catalyst for Catalytic NO Decomposition: TPD and TPR Studies

Xiao

Yang

2009

Catal Lett

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Catalytic NO decomposition on LaSrMn 1-x Ni x O 41d (0 B x B 1) is investigated. The activity of NO decomposition increases dramatically after the substitution of Ni for Mn, but decreases when Mn is completely replaced by Ni (x = 1.0). The optimum value is at x = 0.8. These indicate that the catalytic performance of the samples is contributed by the synergistic effect of Mn and Ni. O 2 -TPD and H 2 -TPR experiments are carried out to explain the change of activity. The former indicates that only when oxygen vacancy is created, could the catalyst show enhanced activity for NO decomposition; the latter suggests that the best activity is obtained from catalyst with the most matched redox potentials (in this work, the biggest DT and DE values). The close relationships between activity and DT or DE indicate that DT and DE are important parameters of catalyst for NO decomposition.

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Section: Xrdmentioning

confidence: 93%

Perovskite-Like Mixed Oxides (LaSrMn1−x Ni x O4+δ, 0 ≤ x ≤ 1) as Catalyst for Catalytic NO Decomposition: TPD and TPR Studies

Xiao

Yang

2009

Catal Lett

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“…From thermodynamic point of view, the thermal decomposition of BaCO 3 and SrCO 3 in ambient air (P CO2 = 30 Pa) requires a temperature of higher than 895 and 722 °C, respectively. [ 175 ] It means the formed carbonates are rather stable and will substantially impact the oxygen reduction process if the alkaline earth metal element-contained cathodes are operated below 700 °C.…”

Section: Sensitivity To Carbon Dioxidementioning

confidence: 99%

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Chen

Zhou

Ding

et al. 2015

Advanced Energy Materials

250

155

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Solid oxide fuel cells (SOFCs) represent one of the cleanest and most efficient options for the direct conversion of a wide variety of fuels to electricity. For example, SOFCs powered by natural gas are ideally suited for distributed power generation. However, the commercialization of SOFC technologies hinges on breakthroughs in materials development to dramatically reduce the cost while enhancing performance and durability. One of the critical obstacles to achieving high‐performance SOFC systems is the cathodes for oxygen reduction reaction (ORR), which perform poorly at low temperatures and degrade over time under operating conditions. Here a comprehensive review of the latest advances in the development of SOFC cathodes is presented: complex oxides without alkaline earth metal elements (because these elements could be vulnerable to phase segregation and contaminant poisoning). Various strategies are discussed for enhancing ORR activity while minimizing the effect of contaminant on electrode durability. Furthermore, some of the critical challenges are briefly highlighted and the prospects for future‐generation SOFC cathodes are discussed. A good understanding of the latest advances and remaining challenges in searching for highly active SOFC cathodes with robust tolerance to contaminants may provide useful guidance for the rational design of new materials and structures for commercially viable SOFC technologies.

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“…The reason for this is, that barium nitrate has a low solubility, precipitates quickly, decomposes to barium oxide and a secondary phase is created. Afterwards barium oxide can easily take up CO 2 and form barium carbonate [39][40][41]:…”

Section: Influence Of Solvents and Powder Characteristicsmentioning

confidence: 99%

Flame Spray Synthesis of Nanoscale La_0.6Sr_0.4Co_0.2Fe_0.8O_3–δ and Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3–δ as Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells

Heel

Holtappels

Hug³

et al. 2010

Fuel Cells

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Electrochemical performance and degradation was analysed by conductivity measurements as well as thermogravimetric analysis (TGA) under different atmospheres. CO2 was identified as a critical parameter in terms of carbonate formation from Ba0.5Sr0.5Co0.8Fe0.2O3–δ and causes a strong increase in the material resistivity, whereas La0.6Sr0.4Co0.2Fe0.8O3–δ is unaffected. The oxygen exchange kinetic of both compositions is affected by CO2 containing atmospheres.

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How (Ba_0.5Sr_0.5)(Fe_0.8Zn_0.2)O_3–δ and (Ba_0.5Sr_0.5)(Co_0.8Fe_0.2)O_3–δ Perovskites Form via an EDTA/Citric Acid Complexing Method

Cited by 71 publications

References 45 publications

Perovskite-Like Mixed Oxides (LaSrMn1−x Ni x O4+δ, 0 ≤ x ≤ 1) as Catalyst for Catalytic NO Decomposition: TPD and TPR Studies

Perovskite-Like Mixed Oxides (LaSrMn1−x Ni x O4+δ, 0 ≤ x ≤ 1) as Catalyst for Catalytic NO Decomposition: TPD and TPR Studies

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Flame Spray Synthesis of Nanoscale La_0.6Sr_0.4Co_0.2Fe_0.8O_3–δ and Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3–δ as Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells

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How (Ba0.5Sr0.5)(Fe0.8Zn0.2)O3–δ and (Ba0.5Sr0.5)(Co0.8Fe0.2)O3–δ Perovskites Form via an EDTA/Citric Acid Complexing Method

Cited by 71 publications

References 45 publications

Perovskite-Like Mixed Oxides (LaSrMn1−x Ni x O4+δ, 0 ≤ x ≤ 1) as Catalyst for Catalytic NO Decomposition: TPD and TPR Studies

Perovskite-Like Mixed Oxides (LaSrMn1−x Ni x O4+δ, 0 ≤ x ≤ 1) as Catalyst for Catalytic NO Decomposition: TPD and TPR Studies

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Flame Spray Synthesis of Nanoscale La0.6Sr0.4Co0.2Fe0.8O3–δ and Ba0.5Sr0.5Co0.8Fe0.2O3–δ as Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells

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How (Ba_0.5Sr_0.5)(Fe_0.8Zn_0.2)O_3–δ and (Ba_0.5Sr_0.5)(Co_0.8Fe_0.2)O_3–δ Perovskites Form via an EDTA/Citric Acid Complexing Method

Flame Spray Synthesis of Nanoscale La_0.6Sr_0.4Co_0.2Fe_0.8O_3–δ and Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3–δ as Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells