Title

Drastic Enhancement Of Photoelectrochemical Water Splitting Performance Over Plasmonic Al@Tio2 Heterostructured Nanocavity Arrays

Keywords

Aluminum; Heterostructure; Photoelectrochemical water splitting; Plasmonic; TiO 2

Abstract

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.

Publication Date

9-1-2018

Publication Title

Nano Energy

Volume

51

Number of Pages

400-407

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.nanoen.2018.06.083

Socpus ID

85049301574 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85049301574

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