Results 21 to 30 of about 3,884,700 (306)

Recent development of hydrogen evolution, oxygen evolution and oxygen reduction reaction [PDF]

open access: yesSCIENTIA SINICA Chimica, 2018
In the 21st century, human beings have to face two serious problems, energy crisis and environmental pollution. Therefore, seeking cheap, durable and efficient overall water splitting electrocatalysts which can be comparable to those of state-of-the-art noble metal catalysts is our ultimate goal.
Yaxiao Guo   +3 more
openaire   +1 more source

Oxygen therapy in respiratory disorders [PDF]

open access: yes, 2012
PhDOxygen therapy remains a cornerstone of medical practice and is generally regarded as being safe. However, there is a lack of clinical evidence to support the routine use of oxygen therapy, and in certain conditions, injudicious oxygen may cause harm.
Wijesinghe, Meme
core   +4 more sources

Reversible perovskite electrocatalysts for oxygen reduction/oxygen evolution [PDF]

open access: yesChemical Science, 2019
Reversible (bi-functional) ORR/OER electrocatalysts identified with the creation of mixed valent Mn perovskites and the Mn 3+ /Mn 4+ surface redox couple.
Kieren Bradley   +4 more
openaire   +4 more sources

Self-template synthesis of hollow flower-like NiCo2O4 nanoparticles as an efficient bifunctional catalyst for oxygen reduction and oxygen evolution in alkaline media

open access: yesNanotechnology Reviews, 2023
A method was proposed to synthesize hollow flower-like NiCo2O4 composed of porous nanosheets using a self-template approach. The unique structure is attributed to the synergistic effect of the Kirkendall effect and the Ostwald ripening mechanism.
Fu Lixiang   +5 more
doaj   +1 more source

Oxygen Evolution Reaction at IrO2/Ir(Ni) Film Electrodes Prepared by Galvanic Replacement and Anodization: Effect of Precursor Ni Film Thickness

open access: yesMolecules, 2019
IrO2/Ir(Ni) film electrodes of variable Ni content have been prepared via a galvanic replacement method, whereby surface layers of pre-deposited Ni are replaced by Ir, followed by electrochemical anodization.
Aikaterini Touni   +4 more
doaj   +1 more source

Effect of Calcination Temperature on the Activity of Unsupported IrO2 Electrocatalysts for the Oxygen Evolution Reaction in Polymer Electrolyte Membrane Water Electrolyzers

open access: yesMolecules, 2023
Polymer electrolyte membrane (PEM) water electrolyzers suffer mainly from slow kinetics regarding the oxygen evolution reaction (OER). Noble metal oxides, like IrO2 and RuO2, are generally more active for OER than metal electrodes, exhibiting low anodic ...
Angeliki Banti   +3 more
doaj   +1 more source

The Evolution of Oxygen As a Biosynthetic Reagent [PDF]

open access: yesThe Journal of General Physiology, 1965
The biosynthesis of certain cell constituents: monounsaturated fatty acids, tyrosine, and nicotinic acid, is oxygen-dependent in many higher organisms. The same compounds can be synthesized by different, oxygen-independent pathways in lower organisms. The general outlines of these pathways are described and the importance of the compounds synthesized ...
openaire   +2 more sources

Evolution of Oxygen Deficiency Center on Fused Silica Surface Irradiated by Ultraviolet Laser and Posttreatment [PDF]

open access: yes, 2014
Evolution of oxygen deficiency centers (ODCs) on a fused silica surface irradiated using a 355 nm ultraviolet (UV) laser beam in both vacuum and atmospheric conditions was quantitatively studied using photoluminescence and X-ray photoelectron ...
Hai-Bing Lü   +11 more
core   +1 more source

UV-B induced alteration of oxygen evolving reactions in pea thylakoid membranes as affected by scavengers of reactive oxygen species

open access: yesBiologia Plantarum, 2014
The effect of UV-B irradiation at temperatures of 22 and 4 °C on flash induced oxygen yields, photochemical activity, and energy transfer in pea thylakoid membranes in the absence and presence of scavengers of reactive oxygen species (ROS) was studied ...
D. Lazarova   +4 more
doaj   +1 more source

Simple method for isolation of oxygen evolving photosystem 2 core complex free of cytochrome f contamination

open access: yesBiologia Plantarum, 2010
This communication presents a simple method for isolation of oxygen evolving photosystem 2 (PS 2) core complex by solubilisation of PS 2 membranes with the nonionic detergent octyl-β-D-thioglucopyranoside (OTG).
R. K. Mishra
doaj   +1 more source

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