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Tuning the Photo‐electrochemical Performance of Ru II ‐Sensitized Two‐Dimensional MoS 2
Author(s) -
Chen Xin,
Krajewska Aleksandra M.,
McGuinness Cormac,
Lynes Amy,
McAteer David,
Berner Nina,
Duesberg Georg,
Coleman Jonathan N.,
McDonald Aidan R.
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202002615
Subject(s) - electrochemistry , covalent bond , catalysis , surface modification , photochemistry , dye sensitized solar cell , materials science , ruthenium , chemistry , combinatorial chemistry , nanotechnology , electrode , organic chemistry , electrolyte
Covalently tethering photosensitizers to catalytically active 1T‐MoS 2 surfaces holds great promise for the solar‐driven hydrogen evolution reaction (HER). Herein, we report the preparation of two new Ru II ‐complex‐functionalized MoS 2 hybrids [Ru II (bpy) 2 (phen)]‐MoS 2 and [Ru II (bpy) 2 (py)Cl]‐MoS 2 . The influence of covalent functionalization of chemically exfoliated 1T‐MoS 2 with coordinating ligands and Ru II complexes on the HER activity and photo‐electrochemical performance of this dye‐sensitized system was studied systematically. We find that the photo‐electrochemical performance of this Ru II ‐complex‐sensitized MoS 2 system is highly dependent on the surface extent of photosensitizers and the catalytic activity of functionalized MoS 2 . The latter was strongly affected by the number and the kind of functional groups. Our results underline the tunability of the photovoltage generation in this dye‐sensitized MoS 2 system by manipulation of the surface functionalities, which provides a practical guidance for smart design of future dye‐sensitized MoS 2 hydrogen production devices towards improved the photofuel conversion efficiency.