Herein, we presented nonprecious plasmonic [email protected]₂ heterostructures for efficient photoelectrochemical (PEC) water splitting by controllably isolating Aluminum (Al) nanoparticles (NPs) individually into TiO₂ nanocavity arrays (NCAs). Compared with bare TiO₂, the [email protected]₂ shows the most prominently enhanced PEC performance under solar light illumination. The significantly enhanced PEC activity of [email protected]₂ photoanode is attributed to the localized surface plasmonic resonance (LSPR) induced electromagnetic field enhancement in UV–visible region and photoinduced hot carrier of Al NPs. Moreover, the naturally formed Al₂O₃ ultrathin layer can act as a protective layer by restraining Al NPs corrosion and reducing the surface charge recombination. This study reveals that a novel plasmonic system can be rationalized by forming isolated earth-abundant metal into the nanostructured semiconductor film with a highly ordered morphology, which opens a new paradigm for advanced catalyst design for PEC water splitting.

在这里，我们介绍了通过有效地将铝（Al）纳米颗粒（NPs）可控地隔离到TiO ₂纳米腔阵列（NCA）中来实现高效光电化学（PEC）水裂解的非贵重的等离激元[电子邮件保护] ₂异质结构。与裸露的TiO ₂相比，[电子邮件保护] ₂在阳光照射下显示出最显着的PEC性能增强。[受电子邮件保护的] ₂光电阳极的PEC活性显着增强归因于局部表面等离子体共振（LSPR）诱导的UV-可见光区的电磁场增强和Al NPs的光诱导热载流子。而且，自然形成的Al ₂ O ₃超薄层可以通过抑制Al NPs腐蚀并减少表面电荷复合来充当保护层。这项研究表明，可以通过将孤立的富含地球的金属形成具有高度有序形态的纳米结构半导体膜，从而使新型等离子体系统合理化，这为PEC水分解的高级催化剂设计开辟了新的范式。