EXAFS characterization of dendrimer-Pt nanocomposites used for the preparation of Pt/[gamma]-[Al.sub.2][O.sub.3] catalysts

Article Abstract:

Various steps of preparation process of Pt/[gamma]- [AI.sub.2][O.sub.3] using hydroxyl-terminated generation four (G4OH) PAMAM dendrimers as the templating agents are monitored by extended X-ray adsorption fine structure (EXAFS) spectroscopy. The results indicate that the hydrolysis of two different platinum precursors, namely [H.sub.2]Pt[CI.sub.6] and [K.sub.2]Pt[CI.sub.4] leads to the formation of [Pt[Cl.sub.3][[H.sub.2]O.sub.3]].sup.+ and [Pt[Cl.sub.2][[H.sub.2]O.sub.2]] species respectively.

Metal ores, not elsewhere classified, All Other Metal Ore Mining, Alumina, Platinum compounds, Structure, Dendrimers, Report

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Dynamics of transversal hot zones in shallow packed-bed reactors

Article Abstract:

The evolution and dynamics of hot zones on the top of a shallow packed-bed reactor, packed with spherical catalyst pellets (Pd/Al2O3) is studied using infrared thermography. The experiments suggested that global coupling between the top of the bed and the unconverted reactants stabilize the spatiotemporal patterns, which may not exist in its absence.

Palladium catalysts

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Ordered Co48Pb52 nanowire arrays electrodeposited in the porous anodic alumina oxide template with enhanced coercivity

Article Abstract:

Co-Pub nanowire arrays with an average diameter of 20nm and lengths up to several micrometers were grown in ordered anodic alumina templates using AC electro deposition. The as-deposited samples were annealed at different temperatures.

Anodizing Compounds, Chemistry, Physical and theoretical, Physical chemistry, Electrodeposition

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