<br>SrMo0.9O3−δ 钙钛矿与分离的 Ru 纳米粒子在固体氧化物燃料电池中用作阳极,ACS Applied Materials & Interfaces

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SrMo0.9O3−δ 钙钛矿与分离的 Ru 纳米粒子在固体氧化物燃料电池中用作阳极
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2024-04-02 , DOI: 10.1021/acsami.3c19099
Vanessa Cascos _{1,

2} , Mónica Chivite Lacaba _{1,

2} , Neven Biskup ₃ , María Teresa Fernández-Díaz ₄ , José Antonio Alonso ₂

Affiliation

一种新型阳极材料 Ru-SrMo _0.9 O _3−δ具有钙钛矿结构和偏析金属 Ru，已在电解质支持的中温固体氧化物燃料电池 (IT-SOFC) 中进行了测试，可提供相当大的功率密度使用纯 H ₂作为燃料，在 850 °C 时高达 840 mW/cm ² 。该材料通过柠檬酸盐法制备，并通过 X 射线衍射 (XRD)、中子粉末衍射 (NPD)、扫描电子显微镜 (SEM) 和扫描透射电子显微镜等不同技术在室温下进行结构和微观结构表征。干）。 NPD 对于确定氧位置和空位非常有用，揭示了具有Pm- 3 m空间群和潜在离子迁移率的立方缺氧钙钛矿 SrMo _0.9 O _3−δ氧化物。另一方面，SEM 和 STEM 研究已能够识别金属分离的 Ru 纳米颗粒，为该材料提供优异的催化活性。还研究了热膨胀系数 (TEC) 以及与其他电池组件的化学相容性或电导率等其他特性，以了解该材料作为 IT-SOFC 阳极的优异性能，并将其与晶体结构相关联。

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SrMo0.9O3−δ Perovskite with Segregated Ru Nanoparticles Performing as Anode in Solid Oxide Fuel Cells

A new anode material, Ru-SrMo_0.9O_3−δ, with a perovskite structure and segregated metallic Ru, has been tested in an intermediate-temperature solid oxide fuel cell (IT-SOFC) in an electrolyte-supported configuration giving substantial power densities as high as 840 mW/cm² at 850 °C using pure H₂ as fuel. This material has been prepared by the citrate method and structurally and microstructurally characterized at room temperature by different techniques such as X-ray diffraction (XRD), neutron powder diffraction (NPD), scanning electron microscopy (SEM), and scanning transmission electron microscopy (STEM). NPD was very useful to determine oxygen positions and vacancies, unveiling a cubic and oxygen-deficient perovskite SrMo_0.9O_3−δ oxide with a Pm-3m space group and potential ionic mobility. On the other hand, SEM and STEM studies have allowed to identify metallic segregated Ru nanoparticles providing the material with an excellent catalytic activity. Other properties such as the thermal expansion coefficient (TEC) and chemical compatibility with other cell components or electrical conductivity have also been studied to understand the excellent performance of this material as anode in IT-SOFC and correlate it with the crystallographic structure.

更新日期：2024-04-02

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