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首页> 外文期刊>Advanced Functional Materials >Optical and Electrical Enhancement of Hydrogen Evolution by MoS_2@MoO_3 Core-Shell Nanowires with Designed Tunable Plasmon Resonance
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Optical and Electrical Enhancement of Hydrogen Evolution by MoS_2@MoO_3 Core-Shell Nanowires with Designed Tunable Plasmon Resonance

机译：具有可调谐等离子体共振的MoS_2 @ MoO_3核壳纳米线对氢逸出的光学和电增强

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摘要

The design of transition-metal chalcogenides (TMCs) photocatalysts for water splitting is highly important, in which both light absorption and interfacial engineering play vital roles in photoexcited electron generation, electron transport, and ultimately speeding up water splitting. To this end, plasmonic metal nanomaterials with surface plasmon resonances are promising candidates. However, it is very difficult to enhance the light absorption and manage the interfacial engineering simultaneously, thus, resulting in suboptimal photocatalytic performance. Here, a doped semiconductor plasmon is proposed to optically and electrically enhance TMCs hydrogen evolution. With the tunability of plasmon resonance in a doped MoO3 semiconductor via hydrogen reduction, the broadband absorption and good interfacial engineering are simultaneously demonstrated in flexible MoS2@MoO3 core-shell nanowire photocatalysts. Better energy-band alignment with MoS2 can also be realized, thereby achieving improved photoinduced electron generation. More importantly, the defects at the interface between MoO3 and MoS2 are effectively reduced because of precise tunability of plasmon resonance, which enhances electron transport. As a proof of concept, this optimized hybrid nanostructure exhibits outstanding H-2 evolution characteristics (841.4 mol h(-1) g(-1)), excellent stability, and good flexibility. The value is also one of the highest hydrogen evolution activity rates to date among the two dimensional-layered visible-light photocatalysts.%1802567.1-1802567.13
机译：用于水分解的过渡金属硫属化物（TMC）光催化剂的设计非常重要，其中光吸收和界面工程在光激发电子的产生，电子传输和最终加速水分解中都起着至关重要的作用。为此，具有表面等离子体激元共振的等离子体金属纳米材料是有希望的候选者。然而，很难同时增强光吸收和管理界面工程，从而导致次优的光催化性能。在此，提出了一种掺杂的半导体等离子体激元，以光学和电增强TMC的氢逸出。 MoS2 @ MoO3核-壳纳米线光催化剂同时具有通过氢还原作用在掺杂的MoO3半导体中产生等离振子共振的可调谐性，同时证明了宽带吸收和良好的界面工程。还可以实现与MoS2更好的能带对准，从而实现改进的光感应电子生成。更重要的是，由于等离激元共振的精确可调性，有效地减少了MoO3和MoS2之间的界面处的缺陷，从而增强了电子传输。作为概念的证明，这种优化的杂化纳米结构具有出色的H-2演化特性（841.4 mol h（-1）g（-1）），出色的稳定性和良好的柔韧性。该值也是二维分层可见光光催化剂中迄今为止最高的析氢活性速率之一。％1802567.1-1802567.13

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  • 来源
    《Advanced Functional Materials》 |2018年第32期|1802567.1-1802567.13|共13页
  • 作者

    Guo Shaohui; Li Xuanhua; Ren Xingang; Yang Lin; Zhu Jinmeng; Wei Bingqing;

  • 作者单位

    Northwestern Polytech Univ, State Key Lab Solidificat Proc, Ctr Nano Energy Mat, Sch Mat Sci & Engn, Xian 710072, Shaanxi, Peoples R China;

    Northwestern Polytech Univ, State Key Lab Solidificat Proc, Ctr Nano Energy Mat, Sch Mat Sci & Engn, Xian 710072, Shaanxi, Peoples R China;

    Anhui Univ, Key Lab Intelligent Comp & Signal Proc, Minist Educ, 3 Feixi Rd, Hefei 230039, Anhui, Peoples R China;

    Northwestern Polytech Univ, State Key Lab Solidificat Proc, Ctr Nano Energy Mat, Sch Mat Sci & Engn, Xian 710072, Shaanxi, Peoples R China;

    Northwestern Polytech Univ, State Key Lab Solidificat Proc, Ctr Nano Energy Mat, Sch Mat Sci & Engn, Xian 710072, Shaanxi, Peoples R China;

    Northwestern Polytech Univ, State Key Lab Solidificat Proc, Ctr Nano Energy Mat, Sch Mat Sci & Engn, Xian 710072, Shaanxi, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    flexible photocatalysts; hybrid structures; MoS2; photocatalytic hydrogen evolution; tunable plasmon;

    机译：柔性光催化剂杂化结构MoS2光催化析氢可调等离子体激元;

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