Novel iridium complexes with N-heterocyclic dicarbene ligands in light-driven water oxidation catalysis: photon management, ligand effect and catalyst evolution

2020 ◽  
Vol 49 (8) ◽  
pp. 2696-2705 ◽  
Author(s):  
Andrea Volpe ◽  
Mirco Natali ◽  
Claudia Graiff ◽  
Andrea Sartorel ◽  
Cristina Tubaro ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Iridium Complexes ◽  
Ligand Effect ◽  
Photon Management ◽  
Water Oxidation Catalysis

Iridium complexes with N-heterocyclic dicarbene ligands have been investigated in light driven water oxidation catalysis within the Ru(bpy)32+/S2O82− cycle.

scholarly journals Post Synthetic Defect Engineering of UiO-66 Metal–Organic Framework with An Iridium(III)-HEDTA Complex and Application in Water Oxidation Catalysis

Inorganics ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 123 ◽  
Author(s):  
Giordano Gatto ◽  
Alceo Macchioni ◽  
Roberto Bondi ◽  
Fabio Marmottini ◽  
Ferdinando Costantino
Keyword(s):  
Water Oxidation ◽  
Metal Organic Framework ◽  
Oxidation Catalysis ◽  
Partial Substitution ◽  
Iridium Complexes ◽  
Cerium Ammonium Nitrate ◽  
Highly Active ◽  
Water Oxidation Catalysis ◽  
Metal Organic ◽  
Organic Framework

Clean production of renewable fuels is a great challenge of our scientific community. Iridium complexes have demonstrated a superior catalytic activity in the water oxidation (WO) reaction, which is a crucial step in water splitting process. Herein, we have used a defective zirconium metal–organic framework (MOF) with UiO-66 structure as support of a highly active Ir complex based on EDTA with the formula [Ir(HEDTA)Cl]Na. The defects are induced by the partial substitution of terephthalic acid with smaller formate groups. Anchoring of the complex occurs through a post-synthetic exchange of formate anions, coordinated at the zirconium clusters of the MOF, with the free carboxylate group of the [Ir(HEDTA)Cl]− complex. The modified material was tested as a heterogeneous catalyst for the WO reaction by using cerium ammonium nitrate (CAN) as the sacrificial agent. Although turnover frequency (TOF) and turnover number (TON) values are comparable to those of other iridium heterogenized catalysts, the MOF exhibits iridium leaching not limited at the first catalytic run, as usually observed, suggesting a lack of stability of the hybrid system under strong oxidative conditions.

Highly Effective Water Oxidation Catalysis with Iridium Complexes through the Use of NaIO4

2013 ◽  
Vol 19 (22) ◽  
pp. 7203-7213 ◽  
Author(s):  
Zoel Codolà ◽  
João M. S. Cardoso ◽  
Beatriz Royo ◽  
Miquel Costas ◽  
Julio Lloret-Fillol
Keyword(s):  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Iridium Complexes ◽  
Highly Effective ◽  
Water Oxidation Catalysis ◽  
Effective Water

scholarly journals Molecular water oxidation catalysis by zwitterionic carboxylate bridge-functionalized bis-NHC iridium complexes

2019 ◽  
Vol 9 (6) ◽  
pp. 1437-1450 ◽  
Author(s):  
Raquel Puerta-Oteo ◽  
M. Victoria Jiménez ◽  
Jesús J. Pérez-Torrente
Keyword(s):  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Molecular Water ◽  
Iridium Complexes ◽  
Intermediate Species ◽  
Carboxylate Bridge ◽  
Water Oxidation Catalysis ◽  
High Valent

Carboxylate functionalized bis-NHC ligands allow for the stabilization of high-valent iridium intermediate species involved in homogeneous water oxidation catalysis.

Half-Sandwich Iridium Complexes for Homogeneous Water-Oxidation Catalysis

2010 ◽  
Vol 132 (45) ◽  
pp. 16017-16029 ◽  
Author(s):  
James D. Blakemore ◽  
Nathan D. Schley ◽  
David Balcells ◽  
Jonathan F. Hull ◽  
Gerard W. Olack ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Iridium Complexes ◽  
Water Oxidation Catalysis ◽  
Half Sandwich

Electrochemical Activation of Cp* Iridium Complexes for Electrode-Driven Water-Oxidation Catalysis

2014 ◽  
Vol 136 (39) ◽  
pp. 13826-13834 ◽  
Author(s):  
Julianne M. Thomsen ◽  
Stafford W. Sheehan ◽  
Sara M. Hashmi ◽  
Jesús Campos ◽  
Ulrich Hintermair ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Electrochemical Activation ◽  
Iridium Complexes ◽  
Water Oxidation Catalysis
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