Hydrogen physisorption based on the dissociative hydrogen chemisorption at the sulphur vacancy of MoS2 surface

We provide a new insight that the sulphur-depleted MoS 2 surface can store hydrogen gas at room temperature. Our findings reveal that the sulphur-vacancy defects preferentially serve as active sites for both hydrogen chemisorption and physisorption. Unexpectedly the sulphur vacancy instantly dissoci...

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Bibliographic Details
Published inScientific reports Vol. 7; no. 1; pp. 1 - 7
Main Authors Han, Sang Wook, Cha, Gi-Beom, Park, Youngsin, Hong, S. C.
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 02.08.2017
Nature Publishing Group
Nature Portfolio
Subjects
119/118
140/146
639/301/119/995
639/4077/4079/4088/4089
Humanities and Social Sciences
Hydrogen
multidisciplinary
Science
Science (multidisciplinary)
Sulfur
Temperature preferences
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Summary:We provide a new insight that the sulphur-depleted MoS 2 surface can store hydrogen gas at room temperature. Our findings reveal that the sulphur-vacancy defects preferentially serve as active sites for both hydrogen chemisorption and physisorption. Unexpectedly the sulphur vacancy instantly dissociates the H 2 molecules and strongly binds the split hydrogen at the exposed Mo atoms. Thereon the additional H 2 molecule is adsorbed with enabling more hydrogen physisorption on the top sites around the sulphur vacancy. Furthermore, the increase of the sulphur vacancy on the MoS 2 surface further activates the dissociative hydrogen chemisorption than the H 2 physisorption.
Bibliography:ObjectType-Article-1
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-017-07178-9