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Facile synthesis of carbon-coated hematite nanostructures for solar water splitting

机译：碳包覆赤铁矿纳米结构的轻松合成，用于太阳能水的分解

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摘要

Carbon-coated hematite nanostructures for solar water splitting were prepared by a simple pyrolysis of ferrocene which showed a remarkable photocurrent of 2.1 mA cm~(-2) at 1.23 V vs. RHE, compared to a value of 0.5 mA cm~(-2) for hematite without the carbon layer. The carbon layer is a few nm thick covering the surface of hematite nanostructures. X-Ray photoelectron spectroscopy and X-ray absorption spectroscopy revealed that the electronic structure of hematite was significantly modified with the existence of oxygen vacancy, which was responsible for the remarkable photocurrent. The carbon layer plays an important role for the appearance of oxygen vacancy. The simple and cheap method could be scaled up easily which may pave the way for the practical application for efficient solar water splitting.
机译：通过二茂铁的简单热解制备了用于太阳能水分解的碳包覆赤铁矿纳米结构，该二茂铁在1.23 V vs. RHE下显示出2.1 mA cm〜（-2）的显着光电流，而RHE值为0.5 mA cm〜（-2） ）用于不含碳层的赤铁矿。碳层几纳米厚，覆盖了赤铁矿纳米结构的表面。 X射线光电子能谱和X射线吸收能谱表明赤铁矿的电子结构由于氧空位的存在而被显着改变，这导致了显着的光电流。碳层对于氧空位的出现起重要作用。这种简单而廉价的方法可以轻松地按比例放大，这可以为实际应用进行有效的太阳能水分解铺平道路。

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  • 来源
    《Energy & environmental science》 |2013年第6期|1965-1970|共6页
  • 作者

    Jiujun Deng; Xiaoxin Lv; Jing Gao; Aiwu Pu; Ming Li; Xuhui Sun; Jun Zhong;

  • 作者单位

    Soochow University-Western University Centre for Synchrotron Radiation Research, Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices,Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University, Suzhou, P. R. China;

    Soochow University-Western University Centre for Synchrotron Radiation Research, Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices,Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University, Suzhou, P. R. China;

    Soochow University-Western University Centre for Synchrotron Radiation Research, Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices,Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University, Suzhou, P. R. China;

    Soochow University-Western University Centre for Synchrotron Radiation Research, Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices,Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University, Suzhou, P. R. China;

    Soochow University-Western University Centre for Synchrotron Radiation Research, Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices,Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University, Suzhou, P. R. China;

    Soochow University-Western University Centre for Synchrotron Radiation Research, Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices,Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University, Suzhou, P. R. China;

    Soochow University-Western University Centre for Synchrotron Radiation Research, Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices,Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Soochow University, Suzhou, P. R. China;

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