Papers by Keyword: Au-Cu

Abstract: The liquid local structure of Au₅₀Cu₅₀ solid solution was detected by high-temperature X-ray diffraction experiment and Reverse Monte Carlo (RMC) simulation. The clusters in the liquid Au₅₀Cu₅₀ alloy comprise the 12-coordinated polyhedron with Au center, which was the same as the clusters in the liquid pure Au. In the case of alloying, there was a high population of Au-Au bonds, and the local structure around Cu atoms was changed. In the case of solidification, the 12-coordinated clusters around Au atoms were preserved into the AuCu alloy, forming the disordered solid solution structure. The strong tendency for Cu-Cu bonds was weakened from 2.35 Å in the liquid to 2.81 Å in the solid solution, and the local structure around Cu atoms rearranges. It is shown that the liquid structure of the Au₅₀Cu₅₀ alloy plays a crucial role in the solid solution. Our findings elucidate that the disordered solid solution structure in AuCu alloy stems from the highly dominated 12-coordinated clusters associated with centered Au atom in the melt.

Abstract: Au-Cu alloy nanowires with diameters 50-100nm and lengths of 500nm have been obtained by direct electrochemical deposition.The fabrication of highly ordered Au-Cu alloy nanowires arrays was used as a Anodic aluminum oxide (AAO) template. This template was fabricated with two-step anodizing method. In this paper, we report electrochemical deposition fabrication of Au–Cu alloy nanowire arrays by AAO. Use SEM, TEM can detect morphology of Au-Cu alloy nanowires, And use EDS to analyse the elements.The electrocatalytic activities of the Au-Cu alloy nanowires for the oxidation of ethanol in acidic medium were investigated by cyclic voltammetry.