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Indexed by:Journal Papers

Date of Publication:2020-02-01

Journal:Advanced Energy Materials

Included Journals:EI

Volume:10

Issue:5

ISSN No.:16146832

Abstract:Direct photo-electrochemical (PEC) water splitting is of great practical interest for developing a sustainable energy systems, but remains a big challenge owing to sluggish charge separation, low efficiency, and poor stability. Herein, a 3D porous In2O3/In2S3 pyramid heterostructure array on a fluorine-doped tin oxide substrate is fabricated by an ion exchange�Cinduced synthesis strategy. Based on the synergistic structural and electronic modulations from density functional theory calculations and experimental observations, 3D porous In2O3/In2S3 photoanode by the protective layer delivers a low onset potential of ��0.02 V versus reversible hydrogen electrode (RHE), the highest photocurrent density of 8.2 mA cm?2 at 1.23 V versus RHE among all the In2S3 photoanodes reported to date, an incident photon-to-current efficiency of 76% at 400 nm, and high stability over 20 h for PEC water splitting are reported. This work provides an alternative promising prototype for the design and construction of novel heterostructures in robust PEC water splitting applications. ? 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim