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.

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.

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.

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.

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.

High Spin State Promotes Water Oxidation Catalysis at Neutral pH in Spinel Cobalt Oxide

2018 ◽  
Vol 57 (5) ◽  
pp. 1441-1445 ◽  
Author(s):  
Lin Ma ◽  
Sung-Fu Hung ◽  
Liping Zhang ◽  
Weizheng Cai ◽  
Hong Bin Yang ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
High Spin ◽  
Spin State ◽  
Water Oxidation ◽  
High Spin State ◽  
Oxidation Catalysis ◽  
Neutral Ph ◽  
Water Oxidation Catalysis

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.

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