platinum – Page 2 – TechConnect Briefs

Light-Off Characteristics for Diesel Oxidation Catalysts in Monolith Reactors: Effects of Catalyst Distribution Schemes

Kapur N., Wang L., Truex T.J., Fujdala K.L., Nicholas J.B., Nanostellar Inc., US

In order to fulfill the EPA emission standards for diesel automobiles, platinum-coated catalytic converters are commonly employed for CO and hydrocarbon oxidation. Mathematical models for monolith reactors can potentially shorten catalyst development time and provide [...]

Two-nozzle flame synthesis of Pt/Ba/Al2O3 for NOx storage

Büchel R., Strobel R., Pratsinis S.E., Baiker A., ETH Zürich, CH

A novel two-nozzle flame spray pyrolysis (FSP) process is presented for one-step preparation of Pt/Ba/Al2O3 particles for NOx storage-reduction (NSR) catalysts. These storage catalysts are of particular interest for mobile engines operating under lean conditions [...]

One-Step Flame-Synthesis of Carbon-Embedded and -Supported Platinum Clusters

Ernst F.O., Büchel R., Strobel R., Pratsinis S.E., ETH Zürich, CH

Carbon-embedded or -supported Pt-clusters were made by a scalable, single-step flame spray pyrolysis (FSP) process. Pt-containing precursors was dissolved in xylene and sprayed and combusted in a controlled oxidation atmosphere resulting in nanostructured, carbon-embedded Pt-clusters. [...]

Nanostructured Metals Synthesized in Swollen Liquid Crystals

Surendran G., Ramos L., Prouzet E., Remita H., CNRS, FR

We have developed a flexible approach for the preparation of nanostructured materials using swollen liquid cristals (SLCs) that exhibit hexagonal, cubic or lamellar symmetry as soft templates.Hexagonal SLCs consist in a regular packing of infinite [...]

Mimicking Photosynthesis to Make Functional Nanostructures and Nanodevices

Shelnutt J.A., Wang Z., Song Y., Medforth C.J., Pereira E., Sandia National Laboratories, US

Photocatalytic porphyrins are used to reduce metal complexes from aqueous solution and, further, to control the deposition of metals onto porphyrin nanotubes and surfactant assembly templates to produce metal composite nanostructures and nanodevices. For example, [...]