Study Of Nano-porous Structure Made On Amorphous Alloy

In this paper, nanoporous structure of the Ti-Cu and Ti-Cu-Pd amorphous alloyswas prepared by an electrochemical and chemical corrosion method. The surfacemorphology of nanoporous structure, element, and phase composition of as-dealloyedsamples were characterized by Scanning Electron Microscopy （SEM）, X-rayPhotoelectron Spectroscopy （XPS）, and X-ray diffraction （XRD）, respectively. Theelectrocatalytic property of the samples with ideal nanoporous structure was studied.The test results show that:（1） a layer or several layers of nanoporous structure issuccessfully prepared by the electrochemical method, the pore size is about30-60nm.However, a uniform porous structure can be observed throughout the wholeas-dealloyed ribbons by chemical dealloying. The EDS and XPS analysis of thesamples with nanoporous structure showed that sample compositions were TiO₂andCu₂O. Under different alkaline conditions, have good catalytic property, and thisperformance was related to the concentration of alkaline solution. With the increasingof concentration of alkaline, the distance of the redox peak decreases. Under differentacidic conditions, the electric catalytic of the samples with nanoporous structure wassmall. Under neutral conditions, no redox peaks of ethylene glycol were found.（2） Anew nanoporous structure of Ti-Cu alloys is successfully prepared by chemicaldealloying. The EDS and XRD analysis of the nanoporous structure show that thesample composition is the element of Cu. For the as-dealloyed of Ti-Cu-Pd alloys, auniform porous structure can be observed throughout the whole ribbons by chemicaldealloying. The EDS, XRD, TEM and N₂adsorption analysis of samples with thenanoporous structure show that the sample compositions are PdCu and CuO. TheBrunauer Emmett Teller （BET） surface areas of the Ti₃₀Cu₆₉Pd₁, Ti₃₀Cu₆₇Pd₃, andTi₃₀Cu₆₅Pd₅amorphous alloys are high and have been determined to be22.718m²/g,17.357m²/g and22.149m²/g, respectively. The pore size of Ti₃₀Cu₆₉Pd₁, Ti₃₀Cu₆₇Pd₃,and Ti₃₀Cu₆₅Pd₅amorphous alloys are11.395nm,18.906nm and11.427nm,respectively.