Earth-abundant metal complexes as catalysts for water oxidation; is it homogeneous or heterogeneous?

2015 ◽  
Vol 5 (11) ◽  
pp. 4901-4925 ◽  
Author(s):  
Md. Ali Asraf ◽  
Hussein A. Younus ◽  
Mekhman Yusubov ◽  
Francis Verpoort
Keyword(s):  
Metal Complexes ◽  
Water Oxidation ◽  
Earth Abundant

This minireview focuses on the aspects that determine whether particular catalysts for the oxidation of water are homogeneous or heterogeneous.

scholarly journals Photoredox Catalysis with Metal Complexes Made from Earth-Abundant Elements

2017 ◽  
Vol 24 (9) ◽  
pp. 2039-2058 ◽  
Author(s):  
Christopher B. Larsen ◽  
Oliver S. Wenger
Keyword(s):  
Metal Complexes ◽  
Photoredox Catalysis ◽  
Earth Abundant

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.

scholarly journals Photocatalytic water oxidation with a Prussian blue modified brown TiO2

2021 ◽  
Author(s):  
Gulsum Gundogdu ◽  
T. Gamze Ulusoy Ghobadi ◽  
Sina Sadigh Akbari ◽  
Ekmel Ozbay ◽  
Ferdi Karadas
Keyword(s):  
Prussian Blue ◽  
Water Oxidation ◽  
Prussian Blue Analogue ◽  
Earth Abundant

A CoFe Prussian blue analogue is coupled with brown TiO2 nanoparticles to achieve an earth-abundant photocatalytic water oxidation assembly.

Ligand photodissociation in Ru(ii)–1,4,7-triazacyclononane complexes enhances water oxidation and enables electrochemical generation of surface active species

2020 ◽  
Vol 10 (10) ◽  
pp. 3399-3408 ◽  
Author(s):  
Hussein A. Younus ◽  
Nazir Ahmad ◽  
Ibrahim Yildiz ◽  
Serge Zhuiykov ◽  
Shiguo Zhang ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Partial Oxidation ◽  
Water Oxidation ◽  
Active Species ◽  
Electrochemical Generation ◽  
Surface Active ◽  
Complete Dissociation

Ligand transformations involved in metal complexes during water oxidation (WO), such as ligand decomposition, partial oxidation, or complete dissociation have been reported, however, ligand photodissociation has not been reported yet.

scholarly journals Cover Feature: Tailoring a Zinc Oxide Nanorod Surface by Adding an Earth‐Abundant Cocatalyst for Induced Sunlight Water Oxidation (ChemPhysChem 6/2020)

ChemPhysChem ◽  
2020 ◽  
Vol 21 (6) ◽  
pp. 465-465
Author(s):  
Rafael M. Almeida ◽  
Victoria C. Ferrari ◽  
Juliana S. Souza ◽  
Flavio L. Souza ◽  
Wendel A. Alves
Keyword(s):  
Zinc Oxide ◽  
Water Oxidation ◽  
Earth Abundant

Earth-Abundant Heterogeneous Water Oxidation Catalysts

2016 ◽  
Vol 116 (22) ◽  
pp. 14120-14136 ◽  
Author(s):  
Bryan M. Hunter ◽  
Harry B. Gray ◽  
Astrid M. Müller
Keyword(s):  
Water Oxidation ◽  
Oxidation Catalysts ◽  
Earth Abundant

Cobalt salophen complexes for light-driven water oxidation

2016 ◽  
Vol 6 (12) ◽  
pp. 4271-4282 ◽  
Author(s):  
Md. Ali Asraf ◽  
Hussein A. Younus ◽  
Chizoba I. Ezugwu ◽  
Akshay Mehta ◽  
Francis Verpoort
Keyword(s):  
Water Oxidation ◽  
Oxidation Reaction ◽  
Molecular Complexes ◽  
Earth Abundant

Earth-abundant molecular complexes have been found to be excellent catalysts for the light-driven water oxidation reaction.

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