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Synthesis and Characterization of a Covalent Porphyrin‐Cobalt Diimine‐Dioxime Dyad for Photoelectrochemical H 2 Evolution
Author(s) -
Charisiadis Asterios,
Giannoudis Emmanouil,
Pournara Zoi,
Kosma Aimilia,
Nikolaou Vasilis,
Charalambidis Georgios,
Artero Vincent,
ChavarotKerlidou Murielle,
Coutsolelos Athanassios G.
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.202001111
Subject(s) - porphyrin , diimine , cobalt , photocathode , photochemistry , covalent bond , materials science , hydrogen production , artificial photosynthesis , water splitting , catalysis , chemistry , photocatalysis , inorganic chemistry , organic chemistry , physics , quantum mechanics , electron
The utilization of solar energy via photoelectrochemical cells (PEC) towards hydrogen (H 2 ) production is a promising approach in the field of artificial photosynthesis. In this work, the synthesis and complete characterization of the first covalently linked porphyrin‐cobalt diimine‐dioxime dyad ( ZnP‐Co ) is reported. The synthetic procedure that was followed is based on simple and high yielding reactions, without using any noble metal. Photophysical investigation of the dyad revealed sufficient electronic communication between the sensitizer and the catalyst in the excited state. Finally, NiO films were sensitized with ZnP‐Co and the H 2 ‐evolving photoelectrochemical activity of the resulting photocathode was assessed. The modest performances could be rationalized thanks to photolysis and post‐operando characterizations of the system, thus providing some guidelines toward the design of more efficient porphyrin‐based assemblies.