Results 1 to 10 of about 83,253 (118)

Adsorbed Oxygen Ions and Oxygen Vacancies: Their Concentration and Distribution in Metal Oxide Chemical Sensors and Influencing Role in Sensitivity and Sensing Mechanisms [PDF]

open access: yesSensors, 2022
Oxidation reactions on semiconducting metal oxide (SMOs) surfaces have been extensively worked on in catalysis, fuel cells, and sensors. SMOs engage powerfully in energy-related applications such as batteries, supercapacitors, solid oxide fuel cells ...
Engin Ciftyurek   +2 more
doaj   +2 more sources

Adsorbed oxygen dynamics at forced convection interface in the oxygen evolution reaction [PDF]

open access: yesNature Communications
The oxygen evolution reaction is a prevalent anodic reaction in electrocatalytic processes. Modulation of adsorbed oxygen (*O) at the electrochemical interface is an effective means to reduce the overpotential of the oxygen evolution reaction.
Zhixuan Chen   +4 more
doaj   +2 more sources

The use of 18O2 to investigate the soot oxidation process on Co3O4, Co3O4-CeO2 and CeO2 catalysts in tight contact conditions

open access: yesCatalysis Communications, 2023
The reaction mechanism of soot oxidation in tight contact conditions and that of oxygen mobility in the crystal lattices of Co3O4, Co3O4-CeO2 and CeO2 was studied.
Marek Rotko
doaj   +1 more source

A highly dispersed Pt/copper modified-MnO2 catalyst for the complete oxidation of volatile organic compounds: The effect of oxygen species on the catalytic mechanism

open access: yesGreen Energy & Environment, 2023
Manganese oxide (MnO2) exhibits excellent activity for volatile organic compound oxidation. However, it is currently unknown whether lattice oxygen or adsorbed oxygen is more conducive to the progress of the catalytic reaction.
Xunxun Li   +7 more
doaj   +1 more source

Quantitative Characterization of Oxygen-Containing Groups on the Surface of Carbon Materials: XPS and NEXAFS Study

open access: yesApplied Sciences, 2022
The results of the comparative quantitative study of oxygen-containing groups adsorbed on the surface of carbonized sponge scaffold (CSS), highly oriented pyrolytic graphite (HOPG), fullerite C60 and multi-walled carbon nanotubes (MWCNTs) introduced into
Danil V. Sivkov   +10 more
doaj   +1 more source

On deoxidation and modification of carbon steel

open access: yesЛитьë и металлургия, 2023
It has been shown that the elementary crystal cells of the basic products of deoxidation and modification of carbon steel, δ ferrite and austenite do not correspond to the principle of structural and dimensional correspondence of Dankov – Konobeevsky ...
E. I. Marukovich   +2 more
doaj   +1 more source

Photocatalytic reduction of CO2 over Ni-CuxO thin films towards formic acid production

open access: yesJournal of Materials Research and Technology, 2023
Copper oxide (CuO) is an abundant and low-cost material, which is active as a photocatalyst under visible light due to its narrow band gap (1.3 eV). In the present work, CuO thin films at different Ni doping amounts (5, 10, and 30 % mol) were prepared ...
Luz I. Ibarra-Rodriguez   +7 more
doaj   +1 more source

On the anomalous shapes of native copper crystals from the Michigan Copper Country [PDF]

open access: yesEuropean Journal of Mineralogy, 2021
For over a century, the anomalous shapes of Michigan copper crystals from the Michigan Copper Country have been acknowledged. They are well known by mineral collectors and curated in museums from all around the world; still, their particular habits ...
J.-C. Boulliard, J. Aléon, E. Gaillou
doaj   +1 more source

Assisting effect of Al2O3 on MnOx for NO catalytic oxidation

open access: yesGreen Energy & Environment, 2021
Various Mn-based catalysts for NO oxidation were prepared using MnOx as active compound, while TiO2 and Al2O3 were adopted as catalyst support. The performance of the catalysts was tested to study the effect of support on Mn-based catalyst activity ...
Denghui Wang   +4 more
doaj   +1 more source

ALUMINIUM BRONZE. NANOSTRUCTURAL PROCESSES OF MELTING AND MOULDING

open access: yesЛитьë и металлургия, 2018
It is shown that melting and molding of aluminum bronze are difficult physical and chemical processes. In them the major role is played by the centers of crystallization of dendrites of a a-phase, the a-phase nanocrystals dissolved and the adsorbed ...
E. I. Marukovich, V. Yu. Stetsenko
doaj   +1 more source

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