Water splitting using a three-dimensional plasmonic photoanode with titanium dioxide nano-tunnels
Water splitting using a three-dimensional plasmonic photoanode with titanium dioxide nano-tunnels
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DOI：
10.1039/c6gc03217f
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发表时间：
2017-05-21
期刊：
影响因子：
9.8
通讯作者：
Misawa, Hiroaki
中科院分区：
文献类型：
--
作者：
Takakura, Ryohei;Oshikiri, Tomoya;Misawa, Hiroaki
在这项研究中，我们开发了一个三维等离子体光阳极使用二氧化钛纳米隧道（TNTs）负载金纳米粒子（Au-NPs）的水裂解，以提高反应效率。我们还优化了在复杂的三维结构上负载Au-NPs的过程。我们讨论了从光电化学测量获得的等离子体诱导的电荷分离和通过透射电子显微镜观察到的金纳米颗粒的形态之间的相关性。我们已经成功地使用HAu（OH）（4）作为前体在TNT的壁上沉积了分散良好的Au-NP。估计TNT上的Au-NP的量比薄膜二氧化钛基材上的Au-NP的量大约15倍，并且粒径保持较小。光电化学水分解是通过使用两个电极系统，而不是一个三电极系统。此外，化学计量的水裂解证实了通过估计的量的释放的H-2和O-2气体在可见光照射下。
In this study, we developed a three-dimensional plasmonic photoanode using titanium dioxide nanotunnels (TNTs) loaded with gold nanoparticles (Au-NPs) for water splitting, to enhance the reaction efficiency. We also optimized the procedure of loading Au-NPs on complex three-dimensional structures. We discuss the correlation between the plasmon-induced charge separation obtained from photoelectrochemical measurement and the morphology of Au-NPs observed by transmission electron microscopy. We have successfully deposited well-dispersed Au-NPs on the walls of TNTs using HAu(OH)(4) as a precursor. The amount of Au-NPs on the TNTs was estimated to be approximately 15-fold larger than that on the thin film titanium dioxide substrate, and the particle size remained small. Photoelectrochemical water splitting was achieved by using a two-electrode system rather than a three-electrode system. Furthermore, stoichiometric water splitting was confirmed by estimating the amounts of the evolved H-2 and O-2 gases under visible light irradiation.