Original Title:
Two nickel thiosemicarbazone-dithiolene complexes for photocatalytic hydrogen evolution in the presence of CdTe quantum dots
Languages of Item:
English
Creator:
Kourmousi, Maria
Charalampous, Eleni
Vassiliou, Stamatia
Mitsopoloulou, Christiana
Affiliation:
Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian
University of Athens
Organic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian
University of Athens
Abstract:
Τhe global need to reduce the carbon footprint and switch to greener energy resources has
made hydrogen gas (H2) a promising alternative to be used as fuel.1 Hydrogen can be produced
from the reduction of water while its combustion solely emits water as a by-product too. This
procedure forms the basis of a circular economy for environmentally friendly energy
production. Photocatalytic hydrogen evolution is a biomimetic process that uses visible light
to split water into hydrogen. To reproduce such an artificial photosynthesis (AP) system, a
photocatalyst, a photosensitizer with absorption in the visible region, an electron donor, and
water are necessary.2 Inspired by biological catalysts, such as [NiFe] hydrogenases, many
complexes containing Ni-S or Ni have been designed to imitate this natural catalytic activity.3,4
Nickel is seen as a cheap and easily accessible metal that belongs to the platinum group and
creates efficient catalysts to be used for hydrogen generation.5 Moreover a range of various
non-innocent ligands attached to a nickel-metal centre represent this kind of biomimetic
catalysts with excessive activity in hydrogen production.6 .Herein we report two Ni (II)
complexes, which come to complement the long-term research work of our laboratory, in
artificial photosynthesis systems for hydrogen evolution.8,9A homoleptic Ni(II)-
thiosemicarbazone complex and a novel heteroleptic Ni(II)-thiosemicarbazone combined with
a dithiolene ligand were studied, in the presence of semiconducting quantum dots (CdTe-TGA)
as photosensitizers, for their photocatalytic activity in different ratios and solvents under
visible light radiation.
Main subject category:
Chemistry
Notes:
Includes bibliographical references:
1. Z. Chen et al., Nano-Micro Lett. 15 (2022) 4.
2. E. Amouyal, Solar Energy Materials and Solar Cells 38 (1995) 249–276.
3. C. A. Mitsopoulou, Coordination Chemistry Reviews 254 (2010) 1448–1456.
4. F. Kamatsos et al., International Journal of Hydrogen Energy.
5. S. Chakrabarti, Nat Commun 14 (2023) 905.
6. M. Drosou, et al., Inorg. Chem. Front. 7 (2020) 37–71.
7. C. Makedonas, C. A. Mitsopoulou, Inorganica Chimica Acta 360 (2007) 3997–4009.
8. A. Zarkadoulas et al., Polyhedron 152 (2018) 138–146.
9. F. Kamatsos et al., Catalysts (2021) 11.
