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首页> 外文期刊>Advanced Functional Materials >The Excellence of Both Worlds: Developing Effective Double Perovskite Oxide Catalyst of Oxygen Reduction Reaction for Room and Elevated Temperature Applications
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The Excellence of Both Worlds: Developing Effective Double Perovskite Oxide Catalyst of Oxygen Reduction Reaction for Room and Elevated Temperature Applications

机译：两全其美：为室温和高温应用开发有效的氧还原钙钛矿型双氧化物催化剂

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摘要

The efficiencies of a number of electrochemical devices (e.g., fuel cells and metal-air batteries) are mainly governed by the kinetics of the oxygen reduction reaction (ORR). Among all the good ORR catalysts, the partially substituted double perovskite oxide (AA'B2O5+delta) has the unique layered structure, providing a great flexibility regarding the optimization of its electronic structures and physicochemical properties. Here, it is demonstrated that the double perovskite oxide, i.e., NdBa0.75Ca0.25Co1.5Fe0.5O5+delta, is a good ORR catalyst at both room and elevated temperatures. Under ambient condition, its half-wave potential of ORR in alkaline media is as low as 0.74 V versus RHE; at 650 degrees C, the cathodic polarization resistance is merely 0.0276 Omega cm(2) according to a symmetric cell measurement, whereas the solid oxide fuel cells using this cathode exhibit a maximum power density of 1982 mW cm(-2). From various materials characterizations, it is hypothesized that its excellent ORR activity is strongly correlated with the crystallographic, electronic, and defect structures of the materials.
机译：许多电化学装置（例如燃料电池和金属空气电池）的效率主要由氧还原反应（ORR）的动力学决定。在所有良好的ORR催化剂中，部分取代的双钙钛矿氧化物（AA'B2O5 +δ）具有独特的层状结构，在优化其电子结构和理化性质方面提供了极大的灵活性。在这里，证明了钙钛矿双氧化物即NdBa0.75Ca0.25Co1.5Fe0.5O5 +δ在室温和高温下都是良好的ORR催化剂。在环境条件下，相对于RHE，ORR在碱性介质中的半波电势低至0.74V。在650摄氏度下，根据对称电池测量，阴极极化电阻仅为0.0276Ωcm（2），而使用该阴极的固体氧化物燃料电池的最大功率密度为1982 mW cm（-2）。根据各种材料的特征，可以假设其优异的ORR活性与材料的晶体学，电子学和缺陷结构密切相关。

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  • 来源
    《Advanced Functional Materials》 |2016年第23期|4106-4112|共7页
  • 作者

    Hua Bin; Zhang Ya-Qian; Yan Ning; Li Meng; Sun Yi-Fei; Chen Jian; Li Jian; Luo Jing-Li;

  • 作者单位

    Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada;

    Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada;

    Univ Amsterdam, Vant Hoff Inst Mol Sci HIMS, NL-1098 XH Amsterdam, Netherlands;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Ctr Fuel Cell Innovat, Wuhan 430074, Hubei, Peoples R China;

    Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada;

    Natl Inst Nanotechnol, Edmonton, AB T6G 2M9, Canada;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Ctr Fuel Cell Innovat, Wuhan 430074, Hubei, Peoples R China;

    Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada;

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