Synergistic coupling of surface plasmon resonance with metal-organic frameworks based biomimetic Z-Scheme catalyst for enhanced photoelectrochemical water splitting
Synergistic coupling of surface plasmon resonance with metal-organic frameworks based biomimetic Z-Scheme catalyst for enhanced photoelectrochemical water splitting
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DOI：
10.1016/j.apsusc.2022.154693
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发表时间：
2022-09
影响因子：
6.7
通讯作者：
Hui Zhou;Xiandong Zhu;Pingji Ge;Tianxiang Hang;Shuoren Li;Fei Guo;Yueyue Wu;Chuanping Li
中科院分区：
文献类型：
--
作者：
Hui Zhou;Xiandong Zhu;Pingji Ge;Tianxiang Hang;Shuoren Li;Fei Guo;Yueyue Wu;Chuanping Li
高太阳能利用率和电荷分离效率的光阳极的开发和纳米化是可再生能源光电分解水的迫切需要。本文通过将纳米金纳米粒子（AuNPs）的表面等离子体共振（SPR）与mofs基Z-scheme催化剂相结合，构建了一种新型协同偶联催化剂（TiO2/NH2-MIL-125/Au）。电子顺磁共振（EPR）谱和理论计算表明，AuNPs的电荷转移路径遵循Z-scheme原理，其SPR效应显著增强了耦合区作为热点的电磁场。这种物理结构上的优越性使得TiO2/ NH2-MIL-125/Au具有更强的氧化还原能力和更高的电荷分离效率。相应的，等离子体耦合Z-scheme催化剂表现出优异的PEC性能，与原始tio2纳米管阵列相比，其PEC性能提高了2.2倍。本研究通过将等离子体效应与仿生Z-scheme体系相结合，建立了一种新的协同耦合模型，并对等离子体增强Z-scheme催化剂的深入理解提供了启示。
Developing and nano-engineering of photoanodes with high solar energy utilization and charge separation efficiency is urgently desirable in photoelectrochemical (PEC) water splitting for renewable energy sources. Herein, a novel synergistic coupling catalyst (TiO2/NH2-MIL-125/Au) is constructed by integrating MOFs-based Z-scheme catalysts with the surface plasmon resonance (SPR) of gold nanoparticles (AuNPs). The electron paramagnetic resonance (EPR) spectra and theoretical calculation indicate that the charge transfer path follows the Z-scheme principle and the SPR effect of AuNPs remarkably enhances the electromagnetic (EM) field at the coupling region acting as hot spots. Such superiority in physical structures endows TiO2/ NH2-MIL-125/Au with stronger redox capability and improved charge separation efficiency. Correspondingly, the plasmon coupled Z-scheme catalyst exhibits excellent PEC performance with a 2.2-fold enhancement in comparison with the pristine TiO2nanotube arrays. This work develops a novel synergistic coupling model by integrating the plasmonic effect with biomimetic Z-scheme systems and sheds light on a deep understanding of plasmon-enhanced Z-scheme catalysts.