scholarly journals Early stages of catalyst aging in the iridium mediated water oxidation reaction

2016 ◽  
Vol 18 (16) ◽  
pp. 10931-10940 ◽  
Author(s):  
Dennis G. H. Hetterscheid ◽  
Cornelis J. M. van der Ham ◽  
Oscar Diaz-Morales ◽  
M. W. G. M. (Tiny) Verhoeven ◽  
Alessandro Longo ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Oxidation Reaction ◽  
Oxidation Catalyst ◽  
Applied Potential ◽  
Early Stages ◽  
Catalyst Aging

The structure of an iridium Cp* water oxidation catalyst was evaluated as a function of time and applied potential.

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.

A high surface area flower-like Ni–Fe layered double hydroxide for electrocatalytic water oxidation reaction

2015 ◽  
Vol 44 (25) ◽  
pp. 11592-11600 ◽  
Author(s):  
Li-Jing Zhou ◽  
Xiaoxi Huang ◽  
Hui Chen ◽  
Panpan Jin ◽  
Guo-Dong Li ◽  
...  
Keyword(s):  
Surface Area ◽  
Layered Double Hydroxide ◽  
Water Oxidation ◽  
Oxidation Reaction ◽  
High Surface ◽  
High Surface Area ◽  
Oxidation Catalyst ◽  
Double Hydroxide

A high surface area flower-like Ni–Fe LDH was shown to be a water oxidation catalyst.

A high-valent di-μ-oxo dimanganese complex covalently anchored in a metal–organic framework as a highly efficient and recoverable water oxidation catalyst

2018 ◽  
Vol 54 (33) ◽  
pp. 4188-4191 ◽  
Author(s):  
Lina Zhang ◽  
Junying Chen ◽  
Ting Fan ◽  
Kui Shen ◽  
Miao Jiang ◽  
...  
Keyword(s):  
High Activity ◽  
Water Oxidation ◽  
Oxidation Reaction ◽  
Metal Organic Framework ◽  
Oxidation Catalyst ◽  
Homogeneous Catalyst ◽  
Highly Efficient ◽  
Metal Organic ◽  
High Valent ◽  
Organic Framework

A biomimetic homogeneous catalyst is successfully anchored inside MOFs, exhibiting high activity and reliable durability in the water oxidation reaction.

CoOx thin film deposited by CVD as efficient water oxidation catalyst: change of oxidation state in XPS and its correlation to electrochemical activity

2016 ◽  
Vol 18 (16) ◽  
pp. 10708-10718 ◽  
Author(s):  
Natascha Weidler ◽  
Sarina Paulus ◽  
Jona Schuch ◽  
Joachim Klett ◽  
Sascha Hoch ◽  
...  
Keyword(s):  
Thin Film ◽  
Oxygen Evolution ◽  
Oxidation State ◽  
Water Oxidation ◽  
Oxidation Reaction ◽  
Electrochemical Activity ◽  
Oxidation Catalyst ◽  
Energy Losses ◽  
Fundamental Understanding

To reduce energy losses in water electrolysers a fundamental understanding of the water oxidation reaction steps is necessary to design efficient oxygen evolution catalysts.

Impact Of Synthesis Route on the Water Oxidation Kinetics of Hematite Photoanodes

2020 ◽  
Author(s):  
Camilo A. Mesa ◽  
Ludmilla Steier ◽  
Benjamin Moss ◽  
Laia Francàs ◽  
James E. Thorne ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Reaction Kinetics ◽  
Water Oxidation ◽  
Oxidation Kinetics ◽  
Oxidation Reaction ◽  
Charge Accumulation ◽  
Optical Signals ◽  
Current Voltage ◽  
Voltage Performance ◽  
Kinetics Of

<p><i>Operando</i> spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Lower photoanode performance was found to correlate with the observation of optical signals indicative of charge accumulation in mid-gap oxygen vacancy states, indicating these states do not contribute directly to water oxidation.</p>

Water Oxidation Catalyst via Heterogenization of Iridium Oxides on Silica: A Polyamine-Mediated Route To Achieve Activity and Stability

ACS Catalysis ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 5699-5705 ◽  
Author(s):  
Nagaraju Shilpa ◽  
Joydeb Manna ◽  
Parasmani Rajput ◽  
Rohit Kumar Rana
Keyword(s):  
Water Oxidation ◽  
Oxidation Catalyst ◽  
Iridium Oxides

Nano-sized Mn oxide: A true catalyst in the water-oxidation reaction

2015 ◽  
Vol 152 ◽  
pp. 127-132 ◽  
Author(s):  
Mohammad Mahdi Najafpour ◽  
Suleyman I. Allakhverdiev
Keyword(s):  
Water Oxidation ◽  
Oxidation Reaction ◽  
Mn Oxide
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