The Pt/Ni modified TiO_2 nanotubes and its catalytic activity toward glucose

摘要

The catalytic activity of Pt/Ni/TiO_2 nanotubes electrode toward glucose has been studied. Fabrication of Pt/Ni nanostructures was done in a single-bath solution through electrochemical pulse method by changing the deposition potential between -0.3 and -4 V vs. SCE, respectively. The resulting modified electrode represented high conductivity due to the effective presence of metallic components and uniform surface area caused by dispersion of Pt and Ni nanostructures. The scanning electron microscopy images also confirmed that a large amount of metals colonies were well-dispersed at the edge of the TiO_2 nanotubes. In addition, the Pt/Ni TiO_2 nanotubes modified electrode exhibited an excellent performance in cyclic voltammetry results by changing the concentration of glucose. The proposed electrode had a wide linear range up to 13 mM with the detection sensitivity of 230 μAmM~(-1) cm~(-2) respectively. The experiment results also revealed that the electrode exhibited good selectivity with no interference from other oxidable species.