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Nickel Complexes and Carbon Dots for Efficient Light‐Driven Hydrogen Production
Author(s) -
Ladomenou Kalliopi,
Papadakis Michael,
Landrou Georgios,
Giorgi Michel,
Drivas Charalambos,
Kennou Stella,
Hardré Renaud,
Massin Julien,
Coutsolelos Athanassios G.,
Orio Maylis
Publication year - 2021
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202100449
Subject(s) - photocatalysis , nickel , catalysis , hydrogen production , ligand (biochemistry) , aqueous solution , chemistry , substituent , photochemistry , hydrogen , carbon fibers , inorganic chemistry , materials science , organic chemistry , composite number , biochemistry , receptor , composite material
Abstract Nitrogen‐doped carbon dots were used as photosensitizers for H 2 evolution in the presence of a series of mononuclear thiosemicarbazone nickel complexes. The catalysts were designed to display different substituents at the para position of the phenyl rings. These chemical modifications tune the electron‐donating abilities of the complexes and influence their capability to reduce protons into hydrogen. All photocatalytic experiments were performed in aqueous solution, using as sacrificial electron donor TCEP/Asc (1 : 1), 0.1 M each, at pH=5. The complex bearing the most electron‐donating ligand with the dimethylamino (N(CH 3 ) 2 ) substituent behaves as the best catalyst in our series of photocatalytic systems with TON CAT =148, under white led radiation for 30 h. Therefore, this noble metal‐free system can effectively produce hydrogen in water and further chemical modification of the ligand will likely improve its production.