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

Sahar Sadat Mahshid,Abolghasem Dolati,Qingyun Cai,Shenglian Luo,Sara Mahshid,Lixia Yang,Mohammad Ghorbani

doi:10.11159/ijtan.2012.010

Sahar Sadat Mahshid, Abolghasem Dolati + Show 5 more

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https://doi.org/10.11159/ijtan.2012.010

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Abstract

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.

Highlights

Metallic nanowires have recently attracted much attention, because of unique physical and electrical properties and potential applications in nanoelectronics devices, nanosensors and catalysts
The Pt/Ni nanowire arrays (NWAs) electrode was fabricated by pulseelectrodeposition of Pt and Ni into the pores of a polycarbonate membrane and subsequent chemical etching of the template
The catalytic activity of the Pt/Ni NWAs electrode towards glucose oxidation was investigated in the wide range of glucose concentration

Summary

Introduction

Metallic nanowires have recently attracted much attention, because of unique physical and electrical properties and potential applications in nanoelectronics devices, nanosensors and catalysts. The development of non-enzymatic glucose sensors has received great attentions. Different metals such as platinum, gold and their alloys have been explored as electrode materials to develop non-enzymatic glucose sensors (Turner et al, 1999). The nickel electrode has been the most widely utilized non-enzymatic electrode for determining glucose in alkaline media and the electrochemical property of metallic nickel electrode, nickel nanoparticles and nanowire arrays of nickel have been well investigated. Many researchers have reported that Pt-based alloy catalysts showed higher activity than Pt-alone (Min et al, 2000). Many works have reported that some Pt-based alloy catalysts show higher activity than Pt-alone, and this has been ascribed to changes in the Pt-Pt bond distance and Pt electronegativity, electron density in the 5d Pt orbital, and surface oxide layers (Lima et al, 2006; Park et al, 2002)

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