Title

Periodically Ordered Nanoporous Perovskite Photoelectrode For Efficient Photoelectrochemical Water Splitting

Keywords

core-shell structure; oxygen vacancy; perovskite; photoelectrochemical water splitting; plasmonic

Abstract

Nonmetallic materials with localized surface plasmon resonance (LSPR) have a great potential for solar energy harvesting applications. Exploring nonmetallic plasmonic materials is desirable yet challenging. Herein, an efficient nonmetallic plasmonic perovskite photoelectrode, namely, SrTiO3, with a periodically ordered nanoporous structure showing an intense LSPR in the visible light region is reported. The crystalline-core@amorphous-shell structure of the SrTiO3 photoelectrode enables a strong LSPR due to the high charge carrier density induced by oxygen vacancies in the amorphous shell. The reversible tunability in LSPR of the SrTiO3 photoelectrode was observed by oxidation/reduction treatment and incident angle adjusting. Such a nonmetallic plasmonic SrTiO3 photoelectrode displays a dramatic plasmon-enhanced photoelectrochemical water splitting performance with a photocurrent density of 170.0 μA cm-2 under visible light illumination and a maximum incident photon-to-current-conversion efficiency of 4.0% in the visible light region, which are comparable to the state-of-the-art plasmonic noble metal sensitized photoelectrodes.

Publication Date

6-26-2018

Publication Title

ACS Nano

Volume

12

Issue

6

Number of Pages

6335-6342

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/acsnano.8b03940

Socpus ID

85048676849 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85048676849

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