title: Highly accessible Pt nanodots homogeneously decorated on Au nanorods surface for sensing.
abstract: Some nanostructures are reported to possess enzyme-mimetic activities similar to those of natural enzymes. Herein, highly-dispersed Pt nanodots on Au nanorods (HD-PtNDs@AuNRs) with mimetic peroxidase activity were designed as an active electrode modifier for fabrication of a hydrogen peroxide (H2O2) electrochemical sensor. The HD-PtNDs@AuNRs were synthesized by a seed-mediated growth approach and confirmed by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, and UV-vis spectroscopy. The electrochemical and catalytical performances of HD-PtNDs@AuNRs towards H2O2 reduction were investigated in detail by cyclic voltammetry and amperometry. The HD-PtNDs@AuNRs modified electrode displayed a high catalytic activity to H2O2 at -0.10 V (versus SCE), a rapid response within 5 s, a wide linear range of 2.0-3800.0 μM, a detection limit of 1.2 μM (S/N=3), and a high sensitivity of 181 μA mM(-1) cm(-2). These results suggested a promising potential of fabricating H2O2 electrochemical sensor using HD-PtNDs@AuNRs.
authors.affiliation: College of Chemistry, Jilin University, Changchun 130012, PR China.
authors.forename: Xun
authors.initials: X
authors.lastname: Feng
authors.affiliation: College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China.
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.affiliation: College of Chemistry, Jilin University, Changchun 130012, PR China.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Shi
authors.affiliation: College of Chemistry, Jilin University, Changchun 130012, PR China.
authors.forename: Hao
authors.initials: H
authors.lastname: Huang
authors.affiliation: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing 100190, PR China.
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Wu
authors.affiliation: College of Chemistry, Jilin University, Changchun 130012, PR China. Electronic address: wbsong@jlu.edu.cn.
authors.forename: Wenbo
authors.initials: W
authors.lastname: Song
mesh_terms: D002384:Catalysis; D055664:Electrochemical Techniques / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000032:analysis*; D057230:Limit of Detection; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D010984:Platinum / Q000737:chemistry*
chemical_list: D010984:Platinum; D006046:Gold; D006861:Hydrogen Peroxide
keywords: Au nanorods; Core–shell nanostructure; Electrocatalysis; Hydrogen peroxide; Pt nanodots; Sensor