A Co(ii)–Ru(ii) dyad relevant to light-driven water oxidation catalysis

2014 ◽  
Vol 16 (24) ◽  
pp. 12000-12007 ◽  
Author(s):  
Alejandro Montellano López ◽  
Mirco Natali ◽  
Erica Pizzolato ◽  
Claudio Chiorboli ◽  
Marcella Bonchio ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Potential Application ◽  
Artificial Photosynthesis ◽  
Oxidation Catalysis ◽  
Oxidation Catalyst ◽  
Water Oxidation Catalysis

The covalent anchoring of a Co(ii) water oxidation catalyst to a Ru(ii) photosensitizer with potential application in artificial photosynthesis.

Efficient electrochemical water oxidation catalysis by nanostructured Mn2O3

RSC Advances ◽  
2015 ◽  
Vol 5 (31) ◽  
pp. 24200-24204 ◽  
Author(s):  
A. Singh ◽  
D. Roy Chowdhury ◽  
S. S. Amritphale ◽  
N. Chandra ◽  
I. B. Singh
Keyword(s):  
Surface Area ◽  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Oxidation Catalyst ◽  
Water Oxidation Catalysis

Hydrothermally synthesized Mn2O3nanorods have been demonstrated as an efficient electrochemical water oxidation catalyst over MnO2despite the fact that later has a higher surface area.

Concentrated-acid triggered superfast generation of porous amorphous cobalt oxide toward efficient water oxidation catalysis in alkaline solution

2019 ◽  
Vol 55 (12) ◽  
pp. 1797-1800 ◽  
Author(s):  
Xuqiang Ji ◽  
Yujia He ◽  
Jingquan Liu
Keyword(s):  
Cobalt Oxide ◽  
Alkaline Solution ◽  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Oxidation Catalyst ◽  
Carbon Cloth ◽  
Water Oxidation Catalysis

Amorphous cobalt oxide on carbon cloth (AMO-CoO/CC) was prepared as an excellent water-oxidation catalyst with 50 mV less overpotential at 10 mA cm−2 than highly-crystallized Co3O4 in 1.0 M KOH.

Differentiating Homogeneous and Heterogeneous Water Oxidation Catalysis: Confirmation that [Co4(H2O)2(α-PW9O34)2]10– Is a Molecular Water Oxidation Catalyst

2013 ◽  
Vol 135 (38) ◽  
pp. 14110-14118 ◽  
Author(s):  
James W. Vickers ◽  
Hongjin Lv ◽  
Jordan M. Sumliner ◽  
Guibo Zhu ◽  
Zhen Luo ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Oxidation Catalyst ◽  
Molecular Water ◽  
Water Oxidation Catalysis

scholarly journals A stable dye-sensitized photoelectrosynthesis cell mediated by a NiO overlayer for water oxidation

2019 ◽  
Vol 117 (23) ◽  
pp. 12564-12571 ◽  
Author(s):  
Degao Wang ◽  
Fujun Niu ◽  
Michael J. Mortelliti ◽  
Matthew V. Sheridan ◽  
Benjamin D. Sherman ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Photocurrent Density ◽  
Oxidation Catalysis ◽  
Oxidation Catalyst ◽  
Photoelectrochemical Cells ◽  
Half Cell ◽  
Dye Sensitized ◽  
Light Absorber ◽  
Water Oxidation Catalysis

In the development of photoelectrochemical cells for water splitting or CO2reduction, a major challenge is O2evolution at photoelectrodes that, in behavior, mimic photosystem II. At an appropriate semiconductor electrode, a water oxidation catalyst must be integrated with a visible light absorber in a stable half-cell configuration. Here, we describe an electrode consisting of a light absorber, an intermediate electron donor layer, and a water oxidation catalyst for sustained light driven water oxidation catalysis. In assembling the electrode on nanoparticle SnO2/TiO2electrodes, a Ru(II) polypyridyl complex was used as the light absorber, NiO was deposited as an overlayer, and a Ru(II) 2,2′-bipyridine-6,6′-dicarboxylate complex as the water oxidation catalyst. In the final electrode, addition of the NiO overlayer enhanced performance toward water oxidation with the final electrode operating with a 1.1 mA/cm2photocurrent density for 2 h without decomposition under one sun illumination in a pH 4.65 solution. We attribute the enhanced performance to the role of NiO as an electron transfer mediator between the light absorber and the catalyst.

scholarly journals Mechanisms of Photoisomerization and Water Oxidation Catalysis of Ruthenium(II) Aquo Complexes

2021 ◽  
Author(s):  
Yuta Tsubonouchi ◽  
Eman A. Mohamed ◽  
Zaki N. Zahran ◽  
Masayuki Yagi
Keyword(s):  
Physicochemical Properties ◽  
Water Oxidation ◽  
Recent Progress ◽  
Artificial Photosynthesis ◽  
Ruthenium Complexes ◽  
Oxidation Catalysis ◽  
Oxidation Catalysts ◽  
Water Oxidation Catalysis ◽  
Molecular Catalysts ◽  
Insight Into

Polypyridyl ruthenium(II) complexes have been widely researched as promising functional molecules. We have found unique photoisomerization reactions of polypyridyl ruthenium(II) aquo complexes. Recently we have attempted to provide insight into the mechanism of the photoisomerization of the complexes and distinguish between the distal−/proximal-isomers in their physicochemical properties and functions. Moreover, polypyridyl ruthenium(II) aquo complexes have been intensively studied as active water oxidation catalysts (WOCs) which are indispensable for artificial photosynthesis. The catalytic aspect and mechanism of water oxidation by the distal-/proximal-isomers of polypyridyl ruthenium(II) aquo complexes have been investigated to provide the guided thought to develop more efficient molecular catalysts for water oxidation. The recent progress on the photoisomerization and water oxidation of polypyridyl ruthenium(II) aquo complexes in our group are reviewed to understand the properties and functions of ruthenium complexes.

scholarly journals Decoration of the layered manganese oxide birnessite with Mn(ii/iii) gives a new water oxidation catalyst with fifty-fold turnover number enhancement

2015 ◽  
Vol 44 (29) ◽  
pp. 12981-12984 ◽  
Author(s):  
Ian G. McKendry ◽  
Sandeep K. Kondaveeti ◽  
Samantha L. Shumlas ◽  
Daniel R. Strongin ◽  
Michael J. Zdilla
Keyword(s):  
Manganese Oxide ◽  
Oxidation State ◽  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Oxidation Catalyst ◽  
Turnover Number ◽  
Average Oxidation State ◽  
Water Oxidation Catalysis ◽  
Layered Manganese Oxide

The role of the manganese average oxidation state (AOS) in water oxidation catalysis by birnessite was investigated.

Structural evolution of the Ru-bms complex to the real water oxidation catalyst of Ru-bda: the bite angle matters

2020 ◽  
Vol 49 (14) ◽  
pp. 4369-4375
Author(s):  
Jing Yang ◽  
Bin Liu ◽  
Lele Duan
Keyword(s):  
Water Oxidation ◽  
Structural Evolution ◽  
Oxidation Catalysis ◽  
Oxidation Catalyst ◽  
The Real ◽  
Bite Angle ◽  
Water Oxidation Catalysis ◽  
Ru Complexes ◽  
Opening Up

The bite angle matters: Opening up the O–Ru–O angle of Ru complexes enables water oxidation catalysis.

In Situ ATR Infrared Study of Cobalt-Borate Water Oxidation Catalysts

2020 ◽  
Vol 998 ◽  
pp. 123-133
Author(s):  
Li Fei Xi ◽  
Christoph Schwanke ◽  
Kathrin M. Lange ◽  
Marcel Risch
Keyword(s):  
Water Oxidation ◽  
Attenuated Total Reflection ◽  
Oxidation Catalysis ◽  
Oxidation Catalyst ◽  
Sodium Borate ◽  
Intermediate Species ◽  
Infrared Study ◽  
Electrode Surfaces ◽  
Water Oxidation Catalysis

Understanding the process of water oxidation, especially intermediate species, represents an important step toward gaining a mechanistic understanding of new emerging catalysts. The aim of this study is exploring the process of water oxidation and electrolyte orientation under external potential when using an emerging water oxidation catalyst, CoBi, in sodium borate (NaBi) buffer using in situ attenuated–total-reflection Fourier transform infrared spectroscopy (ATR-FTIR) spectroscopy. CoBi is generated via electrodeposition from aqueous solutions containing borate and Co2+. IR spectra were obtained for CoBi films under applied potentials supporting water oxidation catalysis. The spectra of water and CoBi on ZnSe/Cr/Au electrode surfaces change in intensity and their slope depends on the potential, which is rarely reported. The appearance of new bands at certain potentials is interpreted in terms of the potential-dependent re-alignment of water and borate molecules both from the film and electrolyte. A superoxide surface intermediate at 1027 cm-1 was observed in both thin and thick films. It is proposed to be Co (III)OO*H bridging and relates to a fast water oxidation process. The chemical structure of the intermediate species is proposed finally.

scholarly journals Hybrid compound based on diethylenetriaminecopper(ii) cations and scarce V-monosubstituted β-octamolybdate as water oxidation catalyst

RSC Advances ◽  
2021 ◽  
Vol 11 (51) ◽  
pp. 32119-32125
Author(s):  
Halyna I. Buvailo ◽  
Valeriya G. Makhankova ◽  
Vladimir N. Kokozay ◽  
Iryna V. Omelchenko ◽  
Svitlana V. Shishkina ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Oxidation Catalyst ◽  
Hybrid Compound ◽  
Water Oxidation Catalysis

A new hybrid compound (NH4){[Cu(dien)(H2O)2]2[β-VMo7O26]}·1.5H2O was employed in homogeneous water oxidation catalysis. At pH 8.0, its efficiency attains 0.19 turnovers per second, supported by the relatively mild water oxidation overpotential of 0.54 V.

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