Nanowires zirconia

Fig. 3.4 SEM images of 20 nm wide Pt nanowires on different oxide supports. AU wires are 5 nm in height, (a) Sihca support, (b) ceria support, (c) alumina support, and (d) zirconia support, (e) Arrhenius plots measured for CO oxidation reactions on zirconia- and ceria-supported Pt nanowire arrays. (Reprinted with permission from ref. [16]. Springer.)...

SEM images of the nanowire arrays on different oxides. From the SEM images, the typical dimensions of a single platinum nanowire are 20x5x12 nm. Catalytic oxidation of CO to CO2 over the various catalyst arrays was carried out at temperatures of 513-613 K. Figure 3.4e shows Arrhenius plots for the reaction on zirconia-and ceria-supported samples. Apparent activation energies for the zirconia- and... 

Yan XM, Kwon S, Contreras AM, Koebel MM, Bokor J, Somoijai GA (2005) Fabrication of dense arrays of platinum nanowires on silica, alumina, zirconia and ceria surfaces as 2-D model catalysts. Catal Lett 105 127-132... 

AAO can only be removed by etching at either high or low pH. Although etching with KOH or NaOH proved effective for the selective removal of alumina in the presence of zirconia nanostructures, this led concurrently to the formation of nanowire bundles (see Figure 8.14). A soUd-gas-phase reaction method was also reported to enable the synthesis of boron nitride nanotubes filled with zirconia nanorods. The formation of these composite nanotubes was achieved simply from zirconium diboride and ammonium chloride as solid-state precursors [128]. 

An array of concentric composite nanostructure of metal nanowires encapsulated in zirconia nanotubes preparation, characterization, and magnetic properties. Chemistry of Materials, 14,4709-13. 

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