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Issue 2, 2015
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High-performance CdS–ZnS core–shell nanorod array photoelectrode for photoelectrochemical hydrogen generation

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Abstract

A dense array of CdS–ZnS core–shell nanorods film (1D vertically aligned) was synthesized through a simple two-step aerosol assisted chemical vapor deposition (AACVD) method. In this configuration, a ZnS nanocrystal (protective shell) was grown in situ on a CdS core, forming nanorod heterostructures to restrain the photo-corrosion and enhance the charge separation and transportation efficiencies of CdS cores. The as-prepared CdS–ZnS films showed elevated photoelectrochemical (PEC) performance (over four times than that of uncoated CdS arrays) with a significant photocurrent density of 7.8 mA cm−2 (0 V, vs. SCE) and incident photon to electron conversion efficiency (IPCE) values above 35% under AM 1.5G irradiation. Moreover, the stability of the photoelectrode was tested for over 16 min. These results suggest that the dense array of CdS–ZnS core–shell heterostructures provides a unique spatial distribution of the photo-excited charge carriers, as well as stable anti-photo-corrosion ability, and therefore is promising to be a photoelectrode in PEC hydrogen generation from water.

Graphical abstract: High-performance CdS–ZnS core–shell nanorod array photoelectrode for photoelectrochemical hydrogen generation

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Article information


Submitted
19 Sep 2014
Accepted
10 Oct 2014
First published
10 Oct 2014

J. Mater. Chem. A, 2015,3, 535-541
Article type
Paper

High-performance CdS–ZnS core–shell nanorod array photoelectrode for photoelectrochemical hydrogen generation

J. Zhang, L. Wang, X. Liu, X. Li and W. Huang, J. Mater. Chem. A, 2015, 3, 535
DOI: 10.1039/C4TA04951A

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