Journal article
Hydrogen peroxide sensing using ultrathin platinum-coated gold nanoparticles with core@shell structure
Biosensors & bioelectronics, Vol.41(1), pp.576-581
03/15/2013
Handle:
https://hdl.handle.net/2376/105713
PMID: 23062554
Abstract
Ultrathin platinum-coated gold (Pt@Au) nanoparticles with core@shell structure have been developed by under-potential deposition (UPD) redox replacement technique. A single UPD Cu replacement with Pt2+ produced a uniform Pt monolayer on the surface of gold nanoparticles, which are immobilized on glassy carbon electrode (GCE) surface based on electrostatic interaction. The ultrathin Pt@Au nanoparticles were confirmed by cyclic voltammetry and X-ray photoelectron spectroscopy (XPS). Voltammetry and amperometric methodologies were used to evaluate the electrocatalytic activity of the Pt@Au nanoparticles modified electrode towards the reduction of hydrogen peroxide under the physiological condition. The present results show that ultrathin Pt coating greatly enhances the electrocatalytic activity towards the reduction of hydrogen peroxide, which can be utilized to fabricate the hydrogen peroxide sensor. Chronoamperometric experiments showed that at an applied potential of 0.08V (vs. Ag/AgCl), the current reduction of hydrogen peroxide was linear to its concentration in the range of 1–450μΜ, and the detection limit was found to be 0.18μM (signal-to-noise ratio, S/N=3).
► Pt@Au nanoparticles have been developed by UPD redox replacement technique. ► Ultrathin Pt layer greatly enhances the electrocatalytic activity towards the reduction of H2O2. ► Pt@Au nanoparticles show high stability, good selectivity and precision for H2O2 sensing.
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Details
- Title
- Hydrogen peroxide sensing using ultrathin platinum-coated gold nanoparticles with core@shell structure
- Creators
- Yongxin Li - College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, ChinaQiufang Lu - College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, ChinaShengnan Wu - College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, ChinaLun Wang - College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, ChinaXianming Shi - Corrosion and Sustainable Infrastructure Lab, Western Transportation Institute, Montana State University, PO Box 174250, Bozeman, MT 59717-4250, United States
- Publication Details
- Biosensors & bioelectronics, Vol.41(1), pp.576-581
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- Elsevier B.V
- Identifiers
- 99900546679001842
- Language
- English
- Resource Type
- Journal article