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Fabrication of SnS₂/SnS Heterojunction with Enhanced Light-Assisted Electrochemical Water Splitting Performance
Shancheng Yan1, Yu Shen1, Ka Wang1
1School of Geography and Biological Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, P. R. China.
Abstract:
Semiconducting metal sulfides have raised strong research interest among researchers as a promising candidate for light-assisted electrochemical water splitting, because they have wide band gap. In order to harvest more light wavelengths for improvement of light-assisted electrochemical water splitting capacity, we fabricated SnS₂/SnS heterojunction nanosheets via facile and environmental route. The SnS₂/SnS heterojunction nanosheets were used as photo-electrocatalytic material which exhibited low over potential of -0.64 V at the current density of 10 mA·cm-2 in 0.5 M NaSO₄ solution. Moreover, the SnS and SnS₂ nanosheets displayed high over potential values of -0.80 and -0.88 V at the current density of 10 mA·cm-2, respectively. This research finding may therefore show the potential for use of SnS₂/SnS heterojunction nanosheets as low cost and environmentally friendly photo-electrocatalysis.
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