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Now showing items 51-60 of 109
A study of the transport properties of perfluorosulfonate ionomers using microelectrodes
(1988)
Chronoamperometry at microelectrodes (10 μm to 0.5 mm in diameter) is a powerful and convenient technique for the determination of apparent diffusion coefficients and concentrations of electroactive cations ion-exchanged ...
A Mechanistic study : gas phase radical formation over metal oxides
(1985)
The formation of gas phase organic radicals during the reactions of methane, ethane, ethylene, propylene and toluene over a variety of metal oxides was investigated. Radicals were produced on the metal oxide surface in a ...
Speciation of arsenic in a Green River oil shale and in its retort oil and waters
(1986)
Oil shale, which geologically is a kerogen containing marlstone, contains arsenic in concentrations more than ten times greater than the earth's crustal concentration. Arsenic has been shown to rapidly and permanently ...
Effect of potassium and copper promoters on reduction behavior of precipitated iron catalysts
(1988)
Precipitated iron catalysts were characterized using temperature-programmed methods, isothermal reduction, and X-ray photoelectron spectroscopy to study the influence of copper and potassium promoters on reduction behavior ...
The effect of plasma composition on chemical and physical events in the direct current plasma
(1986)
Analytical atomic emission spectroscopy has been advanced greatly by the introduction of the plasma as an emission source. The high excitation which it obtains make it an excellent choice for atomic analysis. Still today ...
Catalytic oxidative dimerization of methane
(1987)
The results of this research indicate that [M⁺O⁻] centers (M = Group IA ions) in Group IA/Group IIA oxides are responsible for the catalytic production of CH₃[superscript dot] radicals from CH₄ through hydrogen atom ...
Particle desorption mass spectrometric surface characterization
(1986)
The feasibility of utilizing ²⁵²Cf-Particle Desorption Mass Spectrometry (PDMS) to characterize the surface region of solid samples has been evaluated. The PDMS experiment was adapted to an ultrahigh vacuum (UHV) environment ...
A comparison of anionic transition metal hydrides and anionic transition metal carbonyls : establishing the factors which influence relative reactivity
(1986)
The anionic transition metal hydride, HM(CO)₄L⁻ (M = Cr, W; L = CO, P(OMe)₃, P(C₆H₅)₃, P(Me)₃) reacts with transition metal carbonyl dimers (Cp₂W₂(CO)₆, Cp₂Mo₂(CO)₆, Mn₂(CO)₈{P(C₆H₅)₃}₂, Mn₂(CO)₁₀, Co₂⁻ (CO)₈) to give ...
Complexes of niobium and tantalum containing metal-metal bonds
(1987)
A new entry into the area of low valent niobium and tantalum complexes containing metal-metal bonds is described. M₂X₆(μ-THT)(THF)₂ complexes, where M = Nb or Ta, X = Cl or Br and THT = tetrahydrothiophene, are conveniently ...
Ion transport in thin polypyrrole films
(1987)
Fundamental and applied aspects of ion transport in polypyrrole films are investigated. In this context, three objectives have been accomplished: i) Composites of polypyrrole and a porous host membrane have been prepared ...