In photoelectrochemical'/> Interface Band Engineering Charge Transfer for 3D MoS<sub>2</sub> Photoanode to Boost Photoelectrochemical Water Splitting
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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Interface Band Engineering Charge Transfer for 3D MoS2 Photoanode to Boost Photoelectrochemical Water Splitting
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Interface Band Engineering Charge Transfer for 3D MoS2 Photoanode to Boost Photoelectrochemical Water Splitting

机译：3D MOS 2 PHOTENANE的界面带工程电荷转移，促进光电化学水分裂

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src="http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ascecg/2017/ascecg.2017.5.issue-5/acssuschemeng.6b02883/20170425/images/medium/sc-2016-02883p_0005.gif">In photoelectrochemical (PEC) cells, it is a crucial issue to steer the charge flow in the electrode, including the internal movement of charge in the catalyst and the charge transfer across the catalyst–substrate interface toward the external circuit. Here, we fabricated vertically aligned MoS2 nanosheets (NSs) on carbon fiber cloth (CFC) substrates decorated without and with a Au layer as two photoanodes for PEC water splitting, whereby the interface electron transfer mediated by the embedded Au was demonstrated to contribute to photoelectrode performance. The photoexcited Au plasmon switches the interface barrier from n-type Schottky to a p-type one, making the built-in potential act in accordance with external positive potential to together drive electron transfer and charge separation at the interface. The enhanced electron-transfer dynamic at the Au-embedded interface is determined in terms of the output current, impedance, and incident photon-to-current conversion measurements, being responsible for the significantly increased PEC activity in the MoS2/Au@CFC photoelectrode. This work gains insight into the importance of engineering charge transfer across the catalyst–substrate interface in PEC electrodes.
机译：src =“http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ascecg/2017/ socececg.2017.5.issue-5/acssuschemeng.6b0225/images/medium/sc -2016-02883p_0005.gif“>在光电化学（PEC）细胞中，将电极中的电荷流动引导，包括催化剂中的电荷内部运动和催化剂 - 衬底界面的电荷转移到往达外部电路。在这里，我们在碳纤维布（CFC）基板上垂直对准MOS 2 纳米片（NSS）而没有和使用Au层作为PEC水分裂的两个光电点，由此由介导的界面电子转移嵌入式AU被证明是有助于光电极性能。光孔曝光的AU等离子体从N型肖特基转换到P型界面的界面屏障，使得根据外部积极电位的内置潜在作用，以在界面处一起驱动电子传递和电荷分离。 Au嵌入式接口处的增强的电子传递动态在输出电流，阻抗和入射光电流对电流转换测量方面确定，负责MOS 2中的显着增加的PEC活性。 / AU @ CFC光电极。这项工作获得了对PEC电极中催化剂衬底界面的工程电荷转移的重要性。

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