Lead oxide nano-structure

Cells Produced with Nano-Structured Lead Oxide... 

During the past decade, nanotechnologies have found application in the manufacture of a number of products. Attempts have been made to obtain lead oxide with nano-sized particles under laboratory conditions. Synthesis of a-PbO with nano-crystal structure is achieved through two chemical reactions [26,27]. The first reaction is between solutions of Pb(N03)2 and Na2C03 ... 

Recent studies [193] of the CO oxidation activity exhibited by highly dispersed nano-gold (Au) catalysts have reached the following conclusions (a) bilayer structures of Au are critical (b) a strong interaction between Au and the support leads to wetting and electron rich Au (c) oxidative environments deactivate Au catalyst by re-ox-idizing the support, which causes the Au to de-wet and sinter. Recent results have shown that the direct intervention of the support is not necessary to facilitate the CO oxidation reaction therefore, an Au-only mechanism is sufficient to explain the reaction kinetics. 

The metal oxides prepared by conventional baking or by the CVD method are, in general, chemically stable, crystalline materials, and show excellent mechanical, electrical, optical, and physical properties. Flexible porous gel films obtained by the surface sol-gel process are totally different. In this chapter, we described a new preparative method for ultrathin metal oxide films by stepwise adsorption of various metal alkoxides. We named this method the surface sol-gel process. Structural characterization of the gel films thus obtained, the electrical property, and formation of nano-composites with organic compounds, were also explained. The soft porous gel contains many active hydroxyl groups at the surface and interior of the film. This facilitates adsorption of organic compounds, and consequent preparation of ultrathin metal oxide/polymer nano-composite films and organization of functional small molecules. In the nano-composites, proper selection of polymer components leads to the design of new materials with unique electrical, optical, and chemi-... 

FTIR and Raman spectroscopy of nano-SnO anodes at different discharge states in rechargeable lithium batteries have been investigated. The structure and the composition of the SEI layer are characterized with HRTEM and FTIR spectroscopy, respectively. It is found that irreversible reduction of SnO and electrolyte decomposition lead to capacity loss of the metal oxide anodes in the first cycle. Similar to the SEI layer on carbonaceous anode materials, the main components in the SEI layer on discharged nano-SnO electrode include Li COj and ROCOjLi. The reduction of SnO anode is determined to occur above 1.2V and last until rather low voltages. The formation of Li COj dominates the solvent reduction above 0.9V (vs Li/Li ) while the formation of ROCO Li mainly takes place below 0.9V. 

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