Efficient solar water splitting using a CdS quantum dot decorated TiO2/Ag2Se photoanode

Meena, B. and Subrahmanyam, Ch. and et al, . (2021) Efficient solar water splitting using a CdS quantum dot decorated TiO2/Ag2Se photoanode. International Journal of Hydrogen Energy, 46 (69). pp. 34079-34088. ISSN 03603199

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Metal sulfide photoanodes emerge into an efficient platform for converting light energy into hydrogen by water splitting. Herein, we demonstrate the facile fabrication of a ternary photoanode (TiO2/Ag2Se/CdS) by decorating a TiO2/Ag2Se electrode with CdS quantum dots. The ternary electrode exhibits low charge transfer resistance, and high-density photocurrent (24.6 mAcm−2 at 1.23 V). We estimate the photon-to-hydrogen conversion efficiency at 14% (at 0.43 V) due to sulfite oxidation. Also, Ag2Se improves the electrode stability, highlighting the promising nature of the electrode for practical applications. These excellent photocatalytic properties of TiO2/Ag2Se/CdS are achieved by the favorable band-edges positions of CdS and Ag2Se quantum dots, the broad absorption of solar photons in the UV-to-NIR region, and the separation and transport of charge carriers. © 2021 Hydrogen Energy Publications LLC

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IITH Creators:
IITH CreatorsORCiD
Subrahmanyam, Challapallihttps://orcid.org/0000-0002-2643-3854
Item Type: Article
Uncontrolled Keywords: Ag2Se, Charge separation, Heterojunction, Photoelectrochemical water splitting, Quantum dots, Sulfite oxidation
Subjects: Chemistry
Divisions: Department of Chemistry
Depositing User: Mrs Haseena VKKM
Date Deposited: 24 Jan 2022 09:15
Last Modified: 01 Mar 2022 06:45
URI: http://raiith.iith.ac.in/id/eprint/9117
Publisher URL: https://www.sciencedirect.com/science/article/pii/...
OA policy: https://v2.sherpa.ac.uk/id/publication/12573
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