Fracture of Au-Pt alloys with modulated structure

Dealloying to nanoporous Au/Pt alloys and their structure sensitive electrocatalytic properties.

A simple and general dealloying method is employed to fabricate nanoporous Au/Pt alloys with pre-determined alloy compositions. Structural characterization by electron microscopes demonstrates that selective etching of Cu from Au/Pt/Cu alloy precursors results in the formation of three-dimensional bicontinuous porous network structures with uniform pores and ligaments less than 10 nm. X-Ray pho...

Electronic structure and vibrational entropies of fcc Au-Fe alloys

J. A. Muñoz,1 M. S. Lucas,2,3 L. Mauger,1 I. Halevy,1 J. Horwath,2 S. L. Semiatin,2 Yuming Xiao,4 Paul Chow,4 M. B. Stone,5 D. L. Abernathy,5 and B. Fultz1 1California Institute of Technology, W. M. Keck Laboratory 138-78, Pasadena, California 91125, USA 2Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, USA 3UTC Inc., 1270 North Fairfield Road, Dayton, Ohio 45432, USA 4HPCAT, Ge...

Structure of liquid alloys of the Au - Si and Au - Ge systems

A study of the liquid alloys of the simple eutectic systems Au-Si and AuCre at selected compositions has demonstrated a pattern of behaviour very similar to that seen in the related gold-based system Au-Sn. The sharp x ray diffraction profile of Au-Ge liquid alloys at the gold-rich end demonstrates that the structure, like that of pure Au. is simple, close-packed but with a mean closest distanc...

Hybrid Pt/Au Nanowires: Synthesis and Electronic Structure

This letter reports the synthesis of a new type of noble metal/noble metal hybrid (Pt/Au hybrid nanowires) via galvanic replacement reaction between Pt nanowires and AuCl3. The width of nanowire component is about 2.3 ( 0.2 nm wide, and the diameter of Au component is about 4.5 nm ( 0.8 nm. More interestingly, by using X-ray absorption spectroscopy technique, charge transfer upon hybrids format...

Ground-state properties of ordered, partially ordered, and random Cu-Au and Ni-Pt alloys.