Results 31 to 40 of about 262,836 (345)

A study of the kinetics of the oxidative coupling of methane over a Li/Sn/MgO catalyst [PDF]

open access: yes, 1990
The rate of reaction of methane with oxygen in the presence of a Li/Sn/MgO catalyst has been studied as a function of the partial pressures of CH4, O2 and CO2 using a well-mixed reaction system which is practically gradientless with respect to gas-phase ...
Derksen, J.W.H.C.   +5 more
core   +4 more sources

Measurement and Manipulation of the Charge State of an Adsorbed Oxygen Adatom on the Rutile TiO2(110)-1×1 Surface by nc-AFM and KPFM.

open access: yesJournal of the American Chemical Society, 2018
For the first time, the charge states of adsorbed oxygen adatoms on the rutile TiO2(110)-1×1 surface are successfully measured and deliberately manipulated by a combination of noncontact atomic force microscopy and Kelvin probe force microscopy at 78 K ...
Quanzhen Zhang   +10 more
semanticscholar   +1 more source

Adhesion of endothelial cells and adsorption of serum proteins on gas plasma-treated polytetrafluoroethylene [PDF]

open access: yes, 1991
From in vitro experiments it is known that human endothelial cells show poor adhesion to hydrophobic polymers. The hydrophobicity of vascular prostheses manufactured from Teflon® or Dacron® may be the reason why endothelialization of these grafts does ...
Aken, W.G. van   +5 more
core   +2 more sources

The Role of Water-Surface Interactions of Platinum Based Catalysts in Electrochemical Methanol Oxidation

open access: yesChemical Engineering Transactions, 2014
Study focuses on the impact of potential of zero total charge (PZTC) determined with N2O reduction on different Pt-based catalysts in three important proton exchange membrane fuel cell (PEMFC) reactions, namely oxygen reduction (ORR), CO oxidation and ...
N. Hodnik
doaj   +1 more source

Experimental and Theoretical Study on the Nature of Adsorbed Oxygen Species on Shaped Ceria Nanoparticles.

open access: yesJournal of Physical Chemistry Letters, 2018
Ceria is widely used in heterogeneous catalysis owing to its redox properties. Engineering the shape of ceria particles offers a powerful tool to develop materials with enhanced catalytic properties.
C. Schilling   +2 more
semanticscholar   +1 more source

Oxygen Sensing of Pt/PEO-TiO2 in Humid Atmospheres at Moderate Temperatures

open access: yesSensors, 2021
Here, we show that the presence of adsorbed water improves the oxygen-sensing properties of Pt/TiO2 at moderate temperatures. The studied interface is based on porous plasma electrolytic oxidized titanium (PEO-TiO2) covered with platinum clusters.
Bernd Engelkamp, Klaus Schierbaum
doaj   +1 more source

Analytical carbon-oxygen reactive potential [PDF]

open access: yes, 2008
We present a reactive empirical potential with environment-dependent bond strengths for the carbon-oxygen (CO) system. The distinct feature of the potential is the use of three adjustable parameters characterizing the bond: the strength, length, and ...
Giapis, K. P., Kutana, A.
core   +1 more source

Phenol Adsorption from Dilute Aqueous Solutions by Carbons

open access: yesCHIMIA, 2003
The adsorption of phenol from dilute aqueous solutions by seven activated carbons and one non-porous carbon black is reported. It is confirmed that the equilibrium can be described by a modified Dubinin-Radushkevich-Kaganer equation, with ...
Elena Fernandez   +4 more
doaj   +1 more source

Heavy metal deposition and parameter change of soft contact lenses by exposure to particulate matter

open access: yesBMC Ophthalmology, 2023
Background Particulate matter (PM) is known to contain heavy metals and be harmful to the tissues and organs of the human body including the eyes. As such, in this study, the deposition of heavy metals from PM on soft contact lenses was examined, and ...
Won Young Jung   +3 more
doaj   +1 more source

Atomistic insights into interactions between oxygen and α–Zr (101-1) surface

open access: yesNuclear Materials and Energy, 2021
The oxidation corrosion is a crucial challenge for zirconium (Zr) alloys as cladding materials in fission power reactors. In the present study, a first-principles approach is employed for understanding behaviors of oxygen adsorbed on the Zr (101-1 ...
Zhixiao Liu, Wangyu Hu, Hiuqiu Deng
doaj   +1 more source

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