Nanoparticle size effects on methanol electrochemical oxidation on carbon supported platinum catalysts

Article Abstract:

An investigation was conducted under both potentiodynamic and potentiostatic conditions to study the influence of particle size distribution in the partitioning of methanol electro-oxidation products. An optimum particle size range for efficiently electro-oxidizing methanol to C[O.sub.2] was discovered in the range of 3-10 nm, and loss in efficiency is mostly related to the partial oxidation of methanol to formaldehyde on either too small or too large particles.

Carbon, Platinum catalysts

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TiC nanocrystal formation from carburization of laser-grown Ti/O/C nanopowders for nanostructured ceramics

Article Abstract:

Results concerning the synthesis of Ti/O/C nanopowders by laser pyrolysis and then carburization of these powders to form TiC nanoparticles are presented. Annealing treatments performed on these nanopowders under an inert atmosphere without any C addition enabled the formation of TiC grains through the carburization of the oxide phase by free C incorporated during the synthesis.

Analysis, Titanium compounds, Pyrolysis, Carbides

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Size, shape, and structural control of metallic nanocrystals

Article Abstract:

A study is conducted to show that chemical reduction in colloidal assemblies favors the formation of size-and shape-controlled metallic nanoparticles. The particle shape can be controlled by combining the strategy of the surfactant-based template and the capping of salts or molecules.

Metal crystals

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