Preparation of Pulse Deposited Pt/Ni Nanowires Electrode for Glucose Detection in Alkaline Solution

The development of an amperometric non-enzymatic electrode based on alloyed Pt/Ni nanowire arrays (NWAs) was described. The effect of pulse time on the fabrication of uniform nanowires was investigated by Scanning Electron Microscopy (SEM). In this regard, the pulse time had been designed in a way that the diffusion controlled deposition of metallic ions inside the pores had enough time to take place and uniform structure of nanowires was created. The resulting Pt/Ni NWAs electrode displayed good electro-catalytic activity for oxidation of glucose in alkaline solution. The impact of combination of Pt and Ni in a nanowire arrays electrode in comparison to individual Pt or Ni as nanowires has been studied by cyclic voltammetry in a wide range of potential scan. The amperometric response characteristics to glucose in 0.1 M NaOH solution were reported as low overpotential of 0.45 V vs. SCE, amperometric response time of almost 3 s, linear concentration range extended from 2 to 8 mM (R = 0.997), with 1.5 µM detection limit. Furthermore, the oxidable species such as ascorbic acid and uric acid showed no significant interference in determination of glucose.