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.

A porphyrin-stabilized iridium oxide water oxidation catalyst

2011 ◽  
Vol 89 (2) ◽  
pp. 152-157 ◽  
Author(s):  
Benjamin D. Sherman ◽  
Smitha Pillai ◽  
Gerdenis Kodis ◽  
Jesse Bergkamp ◽  
Thomas E. Mallouk ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Catalytic Activity ◽  
Strong Interaction ◽  
Water Oxidation ◽  
Iridium Oxide ◽  
Oxidation Catalyst ◽  
Porphyrin Ring ◽  
Oxygen Quenching ◽  
Applied Potential ◽  
Colloidal Solutions

Colloidal solutions of iridium oxide hydrate (IrO2·nH2O) were formed using porphyrin stabilizers bearing malonate-like functional groups at each of the four meso positions of the porphyrin ring. Cyclic voltammetry and monitoring of solution oxygen concentrations under constant applied potential demonstrated the electrochemical catalytic activity of the porphyrin–IrO2·nH2O complexes for the oxidation of water to oxygen. Quenching of the porphyrin fluorescence in the complex implies strong interaction between the porphyrin and the IrO2·nH2O. These results mark a step toward developing a porphyrin-based photoanode for use in a photoelectrochemical water-splitting cell.

scholarly journals Alzheimer Disease Biomarker Detection Through Electrocatalytic Water Oxidation Induced by Iridium Oxide Nanoparticles

2014 ◽  
Vol 26 (6) ◽  
pp. 1287-1294 ◽  
Author(s):  
Lourdes Rivas ◽  
Alfredo de la Escosura-Muñiz ◽  
Josefina Pons ◽  
Arben Merkoçi
Keyword(s):  
Alzheimer Disease ◽  
Water Oxidation ◽  
Iridium Oxide ◽  
Oxide Nanoparticles ◽  
Biomarker Detection ◽  
Disease Biomarker

Synthesis and Demonstration of Subnanometric Iridium Oxide as Highly Efficient and Robust Water Oxidation Catalyst

ACS Catalysis ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 5983-5986 ◽  
Author(s):  
Jingqi Guan ◽  
Deng Li ◽  
Rui Si ◽  
Shu Miao ◽  
Fuxiang Zhang ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Iridium Oxide ◽  
Oxidation Catalyst ◽  
Highly Efficient

scholarly journals Catalysis of water oxidation in acetonitrile by iridium oxide nanoparticles

2015 ◽  
Vol 6 (3) ◽  
pp. 1761-1769 ◽  
Author(s):  
Jonnathan C. Hidalgo-Acosta ◽  
Manuel A. Méndez ◽  
Micheál D. Scanlon ◽  
Heron Vrubel ◽  
Véronique Amstutz ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Water Oxidation ◽  
Bulk Water ◽  
Iridium Oxide ◽  
Oxide Nanoparticles ◽  
Water Molecules ◽  
Hydrogen Bonded

Micro-domains of water molecules surrounded by organic solvent exhibit enhanced reactivity towards oxidation compared to highly hydrogen-bonded bulk water molecules.

Domain structure for an amorphous iridium-oxide water-oxidation catalyst characterized by X-ray pair distribution function analysis

2014 ◽  
Vol 16 (5) ◽  
pp. 1814-1819 ◽  
Author(s):  
Jier Huang ◽  
James D. Blakemore ◽  
Diego Fazi ◽  
Oleksandr Kokhan ◽  
Nathan D. Schley ◽  
...  
Keyword(s):  
Distribution Function ◽  
Domain Structure ◽  
Water Oxidation ◽  
Pair Distribution Function ◽  
Function Analysis ◽  
Iridium Oxide ◽  
Oxidation Catalyst ◽  
X Ray

Easy Accommodation of Different Oxidation States in Iridium Oxide Nanoparticles with Different Hydration Degree as Water Oxidation Electrocatalysts

ACS Catalysis ◽  
2015 ◽  
Vol 5 (9) ◽  
pp. 5104-5115 ◽  
Author(s):  
Alessandro Minguzzi ◽  
Cristina Locatelli ◽  
Ottavio Lugaresi ◽  
Elisabetta Achilli ◽  
Giuseppe Cappelletti ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Iridium Oxide ◽  
Oxidation States ◽  
Oxide Nanoparticles ◽  
Hydration Degree
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