CdS supported on electrochemically reduced rGO for photo reduction of water to hydrogen

The paper reports synthesis of CdS supported rGO where reduction of GO to rGO was carried out electrochemically in situ. This catalyst had a better activity for photo-electrochemical dissociation of water to hydrogen. Catalysts were characterized by XRD, FTIR, DRS, XPS, EIS and Mott-Schottky analysi...

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Bibliographic Details
Published in:International journal of hydrogen energy 2019-04, Vol.44 (21), p.10573-10584
Main Authors: Ranjan, Rajiv, Kumar, Manoj, Sinha, A.S.K.
Format: Article
Language:English
Subjects:
CdS /rGO catalyst
Hydrogen
Photoelectrocatalysis
Photoelectrochemical
Water splitting
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Summary:The paper reports synthesis of CdS supported rGO where reduction of GO to rGO was carried out electrochemically in situ. This catalyst had a better activity for photo-electrochemical dissociation of water to hydrogen. Catalysts were characterized by XRD, FTIR, DRS, XPS, EIS and Mott-Schottky analysis. It is reported that this catalyst showed formation of heterojunction at the interface of CdS and rGO by chemical interaction between the two. This resulted in a greater band bending, a higher charge carrier density, low resistance for electronic mobility and low recombination rate. A better activity of the catalyst is due to the above mentioned attributes. [Display omitted] •Electrochemical reduction of water using visible light for hydrogen production using Cds supported on r GO.•Activity of CdS supported on r Go depends on preparation protocol.•Electrochemical reduction leads to an interaction of CdS and rGO.•The interaction provides a better charge separation and a greater electronic conductivity and consequently a high activity.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2019.02.195