Synthesis of Sr
 2
 MgMoO
 6−δ
 by Atmosphere‐Controlled Calcination Method and Characterization for Solid Oxide Fuel Cells

Kinoshitaa, Masahiro; Hara, Kyota; Onozawa, Tomohiro; Shin-mura, Kiyoto; Otani, Yu; Ogawa, Shota; Niwa, Eiji; Hashimoto, Takuya; Sasaki, Kazuya

doi:10.1002/9781119320197.ch8

Cited by 2 publications

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“…As Sr 2 NiMoO 6-δ , Sr 2 MgMoO 6-δ can be obtained through different synthesis methods: solid state synthesis [ 19 , 97 , 98 , 99 , 100 , 101 , 102 , 103 ], solution methods (including sol-gel technology using citric acid [ 24 , 37 , 45 , 72 , 104 , 105 , 106 , 107 ] and EDTA [ 20 , 76 , 77 , 108 , 109 ]), the combustion method using glycine as a fuel and complexing agent [ 110 , 111 ] and the freeze-drying method [ 88 , 108 ]. The main disadvantage of this compound is its non-single phase after synthesis in air ( Figure 8 ).…”

Section: Functional Properties Of Sr 2 Mmoo mentioning

confidence: 99%

“…Discussing the crystal structure of Sr 2 MgMoO 6-δ , the compound can exhibit cubic (Fm3m [ 89 ]), tetragonal (I4/m [ 19 , 72 , 97 , 98 , 106 , 112 , 113 ]), monoclinic (P2 [ 37 ], P21/n [ 77 , 109 ]) or triclinic I-1 [ 101 , 103 , 104 , 108 , 111 ] crystal structures, depending on the synthesis methods. The triclinic structure was proved by neutron diffraction analysis [ 101 ].…”

Section: Functional Properties Of Sr 2 Mmoo mentioning

confidence: 99%

“…The thermal behavior for Sr 2 MgMoO 6-δ was studied only in air, despite the fact that this material was synthesized in a hydrogen atmosphere and that it becomes non-single phase under oxidizing conditions. More precisely, the impurity phases of SrMoO 4 and Sr 3 MoO 6 are formed along with the target Sr 2 MgMoO 6-δ compound after its synthesis in an air atmosphere [ 98 ]. Although Mg-ions exhibit very high chemical stability due to the constant oxidation state (+2), they cannot compensate for an excess of the lattice oxygen upon the oxidation of Sr 2 MgMoO 6-δ , leading to phase decomposition.…”

Section: Functional Properties Of Sr 2 Mmoo mentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Undoped Sr2MMoO6 Double Perovskite Molybdates (M = Ni, Mg, Fe) as Promising Anode Materials for Solid Oxide Fuel Cells

et al. 2021

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The chemical design of new functional materials for solid oxide fuel cells (SOFCs) is of great interest as a means for overcoming the disadvantages of traditional materials. Redox stability, carbon deposition and sulfur poisoning of the anodes are positioned as the main processes that result in the degradation of SOFC performance. In this regard, double perovskite molybdates are possible alternatives to conventional Ni-based cermets. The present review provides the fundamental properties of four members: Sr2NiMoO6-δ, Sr2MgMoO6-δ, Sr2FeMoO6-δ and Sr2Fe1.5Mo0.5O6-δ. These properties vary greatly depending on the type and concentration of the 3d-element occupying the B-position of A2BB’O6. The main emphasis is devoted to: (i) the synthesis features of undoped double molybdates, (ii) their electrical conductivity and thermal behaviors in both oxidizing and reducing atmospheres, as well as (iii) their chemical compatibility with respect to other functional SOFC materials and components of gas atmospheres. The information provided can serve as the basis for the design of efficient fuel electrodes prepared from complex oxides with layered structures.

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Section: Functional Properties Of Sr 2 Mmoo mentioning

confidence: 99%

Section: Functional Properties Of Sr 2 Mmoo mentioning

confidence: 99%

Section: Functional Properties Of Sr 2 Mmoo mentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Undoped Sr2MMoO6 Double Perovskite Molybdates (M = Ni, Mg, Fe) as Promising Anode Materials for Solid Oxide Fuel Cells

et al. 2021

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Chemical compatibility of Sr2MgMoO6−δ with representative electrolyte materials and interlayer materials for solid oxide fuel cells

Takano

Shin-mura

Niwa

et al. 2018

J. Ceram. Soc. Japan

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Sr 2 MgMoO 6¹¤ (SMM) is one of promising anode materials for direct internal reforming solid oxide fuel cells as its excellent performance has been demonstrated. However, it is necessary to be chemically compatible with the electrolyte material to realize the original performance. In this study, we investigate chemical compatibility between SMM and typical electrolyte materials (8% mol Y 2 O 3 92% mol ZrO 2 ; YSZ, 10% mol Sc 2 O 3 1% mol CeO 2 89% mol ZrO 2 ; ScSZ, La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3¹¤ ; LSGM) and anode interlayer materials (Gd 0.1 Ce 0.9 O 2¹¤ ; GDC, Ce 0.8 La 0.2 O 2¹¤ ; LDC) under conditions for preparing SMM electrode and operation. SMM formed a reaction layer with all of the typical electrolyte materials studied. LDC was the only material for the interlayer that maintains chemical compatibility with SMM, though it forms the reaction layer with YSZ and ScSZ. From these results, this study clarifies that LSGM and LDC should be used as electrolyte and interlayer, respectively, when SMM is used as the anode.

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Synthesis of Sr ₂ MgMoO _6−δ by Atmosphere‐Controlled Calcination Method and Characterization for Solid Oxide Fuel Cells

Cited by 2 publications

References 2 publications

Undoped Sr2MMoO6 Double Perovskite Molybdates (M = Ni, Mg, Fe) as Promising Anode Materials for Solid Oxide Fuel Cells

Undoped Sr2MMoO6 Double Perovskite Molybdates (M = Ni, Mg, Fe) as Promising Anode Materials for Solid Oxide Fuel Cells

Chemical compatibility of Sr<sub>2</sub>MgMoO<sub>6−δ</sub> with representative electrolyte materials and interlayer materials for solid oxide fuel cells

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Synthesis of Sr 2 MgMoO 6−δ by Atmosphere‐Controlled Calcination Method and Characterization for Solid Oxide Fuel Cells

Cited by 2 publications

References 2 publications

Undoped Sr2MMoO6 Double Perovskite Molybdates (M = Ni, Mg, Fe) as Promising Anode Materials for Solid Oxide Fuel Cells

Undoped Sr2MMoO6 Double Perovskite Molybdates (M = Ni, Mg, Fe) as Promising Anode Materials for Solid Oxide Fuel Cells

Chemical compatibility of Sr<sub>2</sub>MgMoO<sub>6−δ</sub> with representative electrolyte materials and interlayer materials for solid oxide fuel cells

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Synthesis of Sr ₂ MgMoO _6−δ by Atmosphere‐Controlled Calcination Method and Characterization for Solid Oxide Fuel Cells