Drastic enhancement of photoelectrochemical water splitting performance over plasmonic Al@TiO2 heterostructured nanocavity arrays

被引：67

作者：

Li, Zhao ^{[1
]}

Shi, Li ^{[2
]}

Franklin, Daniel ^{[2
]}

Koul, Supriya ^{[1
]}

Kushima, Akihiro ^{[1
]}

Yang, Yang ^{[1
,2
]}

机构：

[1] Univ Cent Florida, Dept Mat Sci & Engn, Orlando, FL 32816 USA

[2] Univ Cent Florida, NanoSci Technol Ctr, Orlando, FL 32816 USA

来源：

NANO ENERGY | 2018年 / 51卷

关键词：

Aluminum; TiO2; Heterostructure; Plasmonic; Photoelectrochemical water splitting; TIO2 NANOTUBE ARRAYS; CORE/SHELL NANOPARTICLES; METAL PARTICLES; OXIDATION; FILMS; PHOTOANODE; RESONANCE; SYSTEM; GROWTH; SILVER;

D O I：

10.1016/j.nanoen.2018.06.083

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Herein, we presented nonprecious plasmonic Al@TiO2 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 Al@TiO2 shows the most prominently enhanced PEC performance under solar light illumination. The significantly enhanced PEC activity of Al@TiO2 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.

引用

页码：400 / 407

页数：8

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