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Nonmetal P-doped hematite photoanode with enhanced electron mobility and high water oxidation activity

机译:具有增强的电子迁移率和高水氧化活性的非金属P掺杂赤铁矿光电阳极

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摘要

Nonmetal P-doped hematite photoanodes synthesized by a simple impregnation method during the hydrothermal preparation showed remarkable photocurrent densities of 2.3 mA cm(-2) and 2.7 mA cm(-2) at 1.23 V-RHE, for electrodes annealed at 650 degrees C and 750 degrees C, respectively. After "Co-Pi" cocatalyst modification, a photocurrent density of over 3 mA cm(-2) at 1.23 V-RHE could be achieved. The high activity can be attributed to enhanced electron mobility, as verified by DFT + U calculations, electrochemical impedance spectroscopy and structural characterizations.
机译:在水热制备过程中,通过简单的浸渍方法合成的非金属P掺杂赤铁矿光阳极在1.23 V-RHE上显示出显着的光电流密度,分别为2.3 mA cm(-2)和2.7 mA cm(-2),用于650℃和分别为750摄氏度。在“ Co-Pi”助催化剂改性后,可以在1.23 V-RHE上实现超过3 mA cm(-2)的光电流密度。高活性可以归因于增强的电子迁移率,这已通过DFT + U计算,电化学阻抗谱和结构表征得到证实。

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  • 来源
    《Energy & environmental science》 |2015年第4期|1231-1236|共6页
  • 作者单位

    Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China;

    Beihang Univ, Ctr Mat Phys & Chem, Beijing 100191, Peoples R China;

    Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China;

    Beihang Univ, Ctr Mat Phys & Chem, Beijing 100191, Peoples R China;

    Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China;

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