Drastic enhancement of photoelectrochemical water splitting performance over plasmonic Al@TiO2 heterostructured nanocavity arrays
| Autor: | Li Shi, Yang Yang, Zhao Li, Akihiro Kushima, Supriya Koul, Daniel Franklin |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment business.industry Nanoparticle Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Metal Semiconductor visual_art visual_art.visual_art_medium Optoelectronics Water splitting General Materials Science Surface charge Electrical and Electronic Engineering 0210 nano-technology business Layer (electronics) Plasmon |
| Zdroj: | Nano Energy. 51:400-407 |
| ISSN: | 2211-2855 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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