Characterization of few-layer 1T-MoSe{sub 2} and its superior performance in the visible-light induced hydrogen evolution reaction

Journal Article · Mon Sep 01 00:00:00 EDT 2014 · APL Materials

DOI:https://doi.org/10.1063/1.4892976· OSTI ID:22303570

Gupta, Uttam; Naidu, B. S.; Maitra, Urmimala; Rao, C. N. R., ^[1]; Singh, Anjali; Shirodkar, Sharmila N.; Waghmare, Umesh V. ^[2]

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1. Chemistry and Physics Materials Unit, New Chemistry Unit and International Centre for Materials Science, Sheik Saqr Laboratory, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P. O., Bangalore 560064 (India)
2. Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P. O., Bangalore 560064 (India)

Based on earlier results on the photocatalytic properties of MoS{sub 2}, the 1T form of MoSe{sub 2}, prepared by lithium intercalation and exfoliation of bulk MoSe{sub 2}, has been employed for the visible-light induced generation of hydrogen. 1T-MoSe{sub 2} is found to be superior to both 2H and 1T MoS{sub 2} as well as 2H-MoSe{sub 2} in producing hydrogen from water, the yield being in the 60–75 mmol h{sup −1} g{sup −1} range with a turn over frequency of 15–19 h{sup −1}. First principles calculations reveal that 1T-MoSe{sub 2} has a lower work function than 2H-MoSe{sub 2} as well as 1T and 2H-MoS{sub 2}, making it easier to transfer an electron from 1T-MoSe{sub 2} for the production of H{sub 2}.

• OSTI ID: 22303570
• Journal Information: APL Materials, Vol. 2, Issue 9; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2166-532X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CLATHRATES
HYDROGEN
LAYERS
MOLYBDENUM SELENIDES
MOLYBDENUM SULFIDES
PHOTOCATALYSIS
WATER