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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Synergistic Effect of Fe Doping and Plasmonic Au Nanoparticles on W18O49 Nanorods for Enhancing Photoelectrochemical Nitrogen Reduction
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Synergistic Effect of Fe Doping and Plasmonic Au Nanoparticles on W18O49 Nanorods for Enhancing Photoelectrochemical Nitrogen Reduction

机译：Fe掺杂和等离子体Au纳米颗粒对W18O49纳米棒来提高光电化学氮的促进剂的协同作用

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摘要

Photoelectrochemical (PEC) nitrogen fixation has opened up new possibilities for the production of ammonia from water and air under mild conditions, but this process is confronted by the inherent challenges associated with theoretical and experimental works, limiting the efficiency of the nitrogen reduction reaction. Herein, we report for the first time a novel and efficient photoelectrocatalytic system, which has been prepared by assembling plasmonic Au nanoparticles with Fedoped W18O49 nanorods (denoted as WOF-Au). (i) The introduction of exotic Fe atoms into nonstoichiometric W18O49 can eliminate bulk defects of the W18O49 host, which resulted in narrowing bandgap energy and facilitating electron-hole separation and transportation. (ii) Meanwhile, Au nanoparticles combined with a semiconductor induce the localized surface plasmon resonance and generate energetic (hot) electrons, increasing electron density on W18O49 nanorods. Consequently, this plasmonic WOF-Au system shows an NH3 production yield of 9.82 mu g h(-1) cm(-2) at -0.65 V versus Ag/AgCI, which is , similar to 2.5-folds higher than that of the WOF (without Au loading), as well as very high stability, and no NH3 formation was found for the bare W18O49 (WO). This high activity can be associated with the synergistic effects between the Fe dopant and plasmonic Au NPs on the host semiconductor W18O49. This work can bring some insights into the target-directed design of efficient plasmonic hybrid systems for N-2 fixation and artificial photocatalysis.
机译：光电化学（PEC）氮固定在温和条件下开辟了从水和空气生产的新可能性，但是这种过程面临着与理论和实验工程相关的固有挑战，限制了氮还原反应的效率。在此，我们首次报告一种新颖和有效的光电催化系统，该系统通过组装具有联接的W18O49纳米棒（表示为WOF-Au）的等离子体Au纳米颗粒制备。 （i）将异国Fe原子引入非核数W18O49可以消除W18O49宿主的散装缺陷，从而导致带隙能量并促进电子孔分离和运输。 （ii）同时，Au纳米颗粒与半导体组合诱导局部表面等离子体共振并产生能量（热）电子，增加电子密度在W18O49纳米棒上。因此，该等离子体WOF-AU系统显示NH 3产率为9.82μGH（-1）cm（-2）的-0.65 V与AG / AGCI，其类似于比WOF高的2.5倍（没有Au加载），以及非常高的稳定性，并且没有为裸W18O49（WO）找到NH3形成。这种高活性可以与宿主半导体W18O49上的Fe掺杂剂和等离子体Au nps之间的协同效应相关联。这项工作可以对N-2固定和人工光催化的高效等离子体混合系统进行一些见解。

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