Study Of The Nano-porous Surface Made On Ti-Cu Metallic Glass

In this paper, nano-porous structure was prepared in a certain concentration of nitric acid by the constant potential corrosion of the Ti-Cu amorphous alloy. The surface morphology of nano-porous structure was characterized by Scanning Electron Microscopy (SEM) and X-ray Photoelectron Spectroscopy (XPS).Studied the electrocatalytic property of the samples with ideal nano-porous structure. Validated and illustrated the property by Cyclic Voltammetry (CV).The results showed that: During constant potential corrosion process, the final morphology of the nano-porous structure surface was related to five factors: the original sample composition, concentration, load voltage, reaction time and reaction temperature. In the case of the sample composition was given, influence of the load voltage to the morphology was the largest, followed by nitric acid concentration, then the reaction temperature, and finally the reaction time. In the case of other conditions being the same, the influence of the sample composition to the morphology of nano-porous structure were: In the Ti-Cu amorphous alloy, the increased content of the Ti element made it more difficult to form a nano-structure. The XPS analysis of samples with nano-porous structure showed that the sample composition were TiO₂ and Cu₂O. Under alkaline condition samples with nano-porous structure had good catalytic property to ethylene glycol, and this performance was related to the concentration of alkaline solution in the mixture solution: With the growing concentration of alkaline solution, the distance of the redox peak continued to shorten. However, this was not unlimited and the distance had an extreme value. In acidic condition, samples with nano-porous structure did not play a catalytic role, but had the trend of hindering the redox reaction.