Reverse microemulsion synthesis of nanostructured complex oxides for catalytic combustion

Article Abstract:

Sol-gel processing has been used in reverse microemulsions to produce discrete barium hexaaluminate (BHA) nanoparticles with excellent methane combustion activity. This is the result of their high thermal stability, high surface area and the ultrahigh dispersion of cerium oxide on their surfaces. Synthesis parameters such as water to alkoxide ratio were carefully controlled to mould the particle morphology, surface area and structure of BHA nanoparticles. These catalysts have potential practical applications in ultralean catalytic combustion of methane.

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Durable catalysts for cleaner air

Article Abstract:

It has been possible to synthesize promising new catalytic materials that permit methane combustion at 400 degrees C. A number of advanced synthesis methods were brought together to produce porous powders with high surface area and resistance to thermal coarsening at high temperatures. The most significant use of these hexaaluminate powders could be as a matrix to disperse and isolate small particles of other catalysts that are more vulnerable to coarsening.

Analysis, Combustion research

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Synthesis of microporous transition-metal-oxide molecular sieves by a supramolecular templating mechanism

Article Abstract:

Short-chain organic molecules such as amphiphiles can aggregate into supermolecular templates when they create bonds with transition-metal (niobium) alkoxides. This allows them to determine the formation of transition-metal oxides with pore sizes of less than 20 angstroms. It has been established that the supramolecular templating approach for making well-defined microporous Nb-TMS5 can be broadly applied to other short-chain amine molecules.

Molecular sieves

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