Spectroscopic and electrochemical studies of high-valent water soluble manganese porphyrine. Electrocatalytic water oxidation

2014 ◽  
Vol 135 ◽  
pp. 301-310 ◽  
Author(s):  
Maria Alejandra Luna ◽  
Fernando Moyano ◽  
Leonides Sereno ◽  
Fabiana D’Eramo
Keyword(s):  
Water Oxidation ◽  
Water Soluble ◽  
Electrochemical Studies ◽  
High Valent

scholarly journals Aromaticity Driven Electrocatalytic Water Oxidation by a Phosphorus-Nitrogen PN3-Pincer Cobalt Complex

2019 ◽  
Author(s):  
Pradip K. Das ◽  
Sarmistha Bhunia ◽  
Priyanka Chakraborty ◽  
Atanu Rana ◽  
Abhishek Dey ◽  
...  
Keyword(s):  
Water Oxidation ◽  
High Efficiency ◽  
Cobalt Complex ◽  
Potential Jump ◽  
Onset Potential ◽  
New Strategy ◽  
Earth Abundant ◽  
High Valent ◽  
Lower Overpotential ◽  
Cobalt Species

Water oxidation is the primary step in both natural and artificial photosynthesis to convert solar energy in into chemical fuels. Herein, we report the first cobalt-based pincer catalyst for electrolytic water oxidation at neutral pH with high efficiency under electrochemical conditions. Most importantly, ligand (pseudo)aromaticity is identified to play an important role in the electrocatalysis. A significant potential jump (~300 mV) was achieved towards a lower positive value when the aromatized cobalt complex was transformed to a (pseudo)dearomatized cobalt species. This complex catalyzes the water oxidation in its high valent oxidation state at a much lower overpotential (~ 340 mV vs. NHE) based on the onset potential (0.5 mA/cm<sup>2</sup>) of catalysis at pH 10.5, outperforming all the other literature systems. These observations may provide a new strategy for the design of earth-abundant transition metal-based water oxidation catalysts.

Synthesis, characterization, antiplasmodial evaluation and electrochemical studies of water-soluble heterobimetallic ferrocenyl complexes

2016 ◽  
Vol 446 ◽  
pp. 111-115 ◽  
Author(s):  
Nadia Baartzes ◽  
Tameryn Stringer ◽  
Prinessa Chellan ◽  
Jill M. Combrinck ◽  
Peter J. Smith ◽  
...  
Keyword(s):  
Water Soluble ◽  
Electrochemical Studies

Octanuclear Cu(II) cluster-tungstosilicate composite as efficient electrocatalyst for oxygen evolution reaction at near-neutral pH

2021 ◽  
Author(s):  
Junqi Lin ◽  
Xin Chen ◽  
Nini Wang ◽  
Shanshan Liu ◽  
Yanmei Chen ◽  
...  
Keyword(s):  
Transition Metal ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Metal Clusters ◽  
Catalytic Efficiency ◽  
Water Soluble ◽  
Transition Metal Clusters ◽  
Neutral Ph

Transition metal clusters have been used for water oxidation with high catalytic efficiency. However, they are water soluble and often used homogeneously rather than heterogeneously. Herein, a water soluble octanuclear...

Methodology for functionalization of water oxidation catalyst IrOx nanoparticles with hydrophobic and multi-functionalized chromophores

2021 ◽  
Author(s):  
Liniquer A. Fontana ◽  
Vitor H. Rigolin ◽  
Carolyne B. Braga ◽  
Catia Ornelas ◽  
Jackson D. Megiatto
Keyword(s):  
Click Chemistry ◽  
Water Oxidation ◽  
Iridium Oxide ◽  
Water Soluble ◽  
Oxidation Catalyst ◽  
Oxide Nanoparticles

A straightforward “click” chemistry methodology for the sensitization of water soluble iridium oxide nanoparticles with hydrophobic and multi-functionalized porphyrin-based chromophores is described.

Photochemical, Electrochemical, and Photoelectrochemical Water Oxidation Catalyzed by Water-Soluble Mononuclear Ruthenium Complexes

2014 ◽  
Vol 20 (43) ◽  
pp. 13957-13964 ◽  
Author(s):  
Ting-Ting Li ◽  
Wei-Liang Zhao ◽  
Yong Chen ◽  
Fu-Min Li ◽  
Chuan-Jun Wang ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Ruthenium Complexes ◽  
Water Soluble ◽  
Photoelectrochemical Water Oxidation

Photochemical water oxidation by cyclometalated iridium(iii) complexes: a mechanistic insight

2016 ◽  
Vol 52 (19) ◽  
pp. 3840-3843 ◽  
Author(s):  
Sujay Mukhopadhyay ◽  
Roop Shikha Singh ◽  
Arnab Biswas ◽  
Daya Shankar Pandey
Keyword(s):  
Water Oxidation ◽  
Catalytic Cycle ◽  
Mechanistic Insight ◽  
High Valent

Three cyclometalated Ir(iii) complexes for photochemical water oxidation with the realization of high valent iridium in the catalytic cycle are presented.

Tracking the FeIV(O) intermediate and O–O bond formation of a nonheme iron catalyst for water oxidation

2017 ◽  
Vol 53 (65) ◽  
pp. 9063-9066 ◽  
Author(s):  
Bing Yang ◽  
Qing-Qing Yang ◽  
Xin Jiang ◽  
Bin Chen ◽  
Chen-Ho Tung ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Water Oxidation ◽  
Iron Catalyst ◽  
Bond Formation ◽  
Nonheme Iron ◽  
High Valent

We describe here a new complex 1 by subtle modulation of the TPA ligand and succeed in capturing the high-valent FeIV(O) species, which is responsible for the O–O bond formation and oxygen evolution with higher efficiency.

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