• 文献标题:   Branched Platinum Nanostructures on Reduced Graphene: An excellent Transducer for Nonenzymatic Sensing of Hydrogen Peroxide and Biosensing of Xanthine
  • 文献类型:   Article
  • 作  者:   BEHERA TK, SAHU SC, SATPATI B, BAG B, SANJAY K, JENA BK
  • 作者关键词:   graphene, pt nanostructure, hydrogen peroxide, sensor, xanthine biosensor
  • 出版物名称:   ELECTROCHIMICA ACTA
  • ISSN:   0013-4686 EI 1873-3859
  • 通讯作者地址:   CSIR Inst Minerals Mat Technol
  • 被引频次:   18
  • DOI:   10.1016/j.electacta.2016.03.046
  • 出版年:   2016

▎ 摘  要

Here, a facile and highly sensitive platform has been developed for synthesizing branched Pt nanostructures on graphene. Graphene support has been employed to enhance the performance of platinum nanostructures (PtNs) in electrochemical sensing/biosensing. The graphene supported PtNs (GPtNs) modified electrode efficiently oxidises the H2O2 at a lower potential in neutral phosphate buffer solution without employing the enzymes or redox mediators. The GPtNs electrode shows high sensitivity and can detect very low nanomolar concentrations (1 nM) of H2O2. It can linearly sense H2O2 from 0-0.32 mM, and the sensitivity of the sensor was estimated to be 811.26 mu AmM(-1)cm(-2). The sensor shows excellent reproducibility, long time storage and operational stability. The sensor successfully estimates the H2O2 concentration in the real sample (rainwater) for practical analysis. The interesting response of the sensor towards H2O2 employed for fabrication of amperometric oxidase based biosensor for sensing of xanthine. The biosensor is highly stable and showed fast response in biocatalytic sensing of xanthine. (c) 2016 Elsevier Ltd. All rights reserved.