Decomposition of methane over a Ni-Cu-MgO catalyst to produce hydrogen and carbon nanofibers

Article Abstract:

Findings suggest that a Ni-Cu-MgO catalyst maintained its activity for the decomposition of methane at high levels for substantially long periods of time at 665-725 degree Celsius, being capable of generating large amounts of CO-free H2 and solid carbon. Transmission electron microscopy (TEM) studies revealed that the solid carbon consisted exclusively of nanofibers possessing a 'platelet' structure, in which the graphite layers are aligned in a direction perpendicular to the axis of the fiber.

Magnesium Oxide, Methane, Decomposition (Chemistry)

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High-temperature Raman spectroscopy of solid oxide fuel cells materials and processes

Article Abstract:

Raman spectroscopy is shown to be a very valuable means of characterizing in-situ chemical processes of solid oxide fuel cells (SOFC) materials in high temperature environments. Experiments demonstrate the ability of Raman spectroscopy to follow reversible oxidation/reduction kinetics of Ni/NiO as well as the rate of carbon disappearance when graphite, formed in-situ, is exposed to a weakly oxidizing atmosphere.

Oxidation-reduction reaction, Oxidation-reduction reactions, Raman spectroscopy, Dynamics, Dynamics (Mechanics), Mechanical properties

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A solid-state NMR study of Hydrogen-bonding networks and ion dynamics in benzimidazole salts

Article Abstract:

The long-range proton transport in cell membrane constituent phosphoric acid-doped poly(benzimidazole) is dependent on the phosphate anion dynamics. The solid state NMR data show that the phosphate anions have a faster tetrahedral reorientation and a four-site jump compared to a slower reorientation and a three site jump as observed of the methane phosphonate.

Hydrogen bonding, Hydrogen bonds, Nuclear magnetic resonance, Salts, Structure, Benzimidazoles, Report

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