RuII Photosensitizer‐Functionalized Two‐Dimensional MoS2 for Light‐Driven Hydrogen Evolution

Metallic‐phase molybdenum disulfide (1T‐MoS2) nanosheets have proven to be highly active in the hydrogen evolution reaction (HER). We describe construction of photosensitizer functionalized 1T‐MoS2 by covalently tethering the molecular photosensitizer [RuII(bpy)3]2+ (bpy=2,2′‐bipyridine) on 1T‐MoS2...

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Bibliographic Details
Published in:Chemistry : a European journal 2018-01, Vol.24 (2), p.351-355
Main Authors: Chen, Xin, McAteer, David, McGuinness, Cormac, Godwin, Ian, Coleman, Jonathan N., McDonald, Aidan R.
Format: Article
Language:English
Subjects:
Chemistry
dye-sensitized
Electron microscopy
hydrogen
Hydrogen evolution reactions
Molybdenum
Molybdenum disulfide
Nanostructure
photocatalysis
Photoelectric effect
Photoelectric emission
Tethering
transition metals
X ray powder diffraction
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Summary:Metallic‐phase molybdenum disulfide (1T‐MoS2) nanosheets have proven to be highly active in the hydrogen evolution reaction (HER). We describe construction of photosensitizer functionalized 1T‐MoS2 by covalently tethering the molecular photosensitizer [RuII(bpy)3]2+ (bpy=2,2′‐bipyridine) on 1T‐MoS2 nanosheets. This was achieved by covalently tethering the bpy ligand to 1T‐MoS2 nanosheets, and subsequent complexation with [RuII(bpy)2Cl2] to yield [RuII(bpy)3]–MoS2. The obtained [RuII(bpy)3]–MoS2 nanosheets were characterized using infra‐red, electronic absorption, X‐ray photoelectron, and Raman spectroscopies, X‐ray powder diffraction and electron microscopy. The fabricated material exhibited a significant improvement of photocurrent and HER performance, demonstrating the potential of such two‐dimensional [RuII(bpy)3]–MoS2 constructs in photosensitized HER. Catalyzing evolution: Covalent tethering of 1T‐MoS2 nanosheets with [RuII(bpy)3]2+ photosensitizers yields photosensitizing H2‐evolution catalysts. The [RuII(bpy)3]–MoS2 hybrid exhibited a significantly enhanced photocurrent and H2‐evolution performance.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201705203