title: Ultra-fine Pt nanoparticles supported on ionic liquid polymer-functionalized ordered mesoporous carbons for nonenzymatic hydrogen peroxide detection.
abstract: Poly(ionic liquid) (PIL) coated ordered mesoporous carbons (OMCs) were prepared by in situ polymerization of 3-ethyl-1-vinylimidazolium tetrafluoroborate ([VEIM]BF(4)) monomer on OMCs matrix. PIL on the surface of OMCs can provide sufficient binding sites to anchor the precursors of metal ion. PIL/OMCs were employed as support material for the deposition and formation of ultra-fine Pt nanoparticles, via the self-assembly between the negative Pt precursor and positively charged functional groups of PIL-functionalized OMCs. The combination of the unique properties of each component endows Pt/PIL/OMCs as a good electrode material. Compared with the Pt/OMCs nanocomposite, the Pt/PIL/OMCs modified electrode displays high electrocatalytic activity towards hydrogen peroxide (H(2)O(2)) and gives linear range from 1.0 × 10(-7) to 3.2 × 10(-3) M (R=0.999). The Pt/PIL/OMCs responds very rapidly to the changes in the level of H(2)O(2), producing steady-state signals within 4-5s. A high sensitivity of 24.43 μA mM(-1) and low detection limit of 0.08 μM was obtained at Pt/PIL/OMCs modified electrode towards the reduction of H(2)O(2). The improved activity makes Pt/PIL/OMCs nanocomposite promising for being developed as an attractive robust and new electrode material for electrochemical sensors and biosensors design.
authors.affiliation: Faculty of Chemistry, Northeast Normal University, Renmin Street 5268, Changchun, Jilin 130024, PR China.
authors.forename: Xiangjie
authors.initials: X
authors.lastname: Bo
authors.forename: Jing
authors.initials: J
authors.lastname: Bai
authors.forename: Bin
authors.initials: B
authors.lastname: Qi
authors.forename: Liping
authors.initials: L
authors.lastname: Guo
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods; D002244:Carbon / Q000737:chemistry; D055664:Electrochemical Techniques; D006861:Hydrogen Peroxide / Q000032:analysis*; D052578:Ionic Liquids / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites; D010984:Platinum / Q000737:chemistry*; D016062:Porosity; D015203:Reproducibility of Results
chemical_list: D052578:Ionic Liquids; D010984:Platinum; D002244:Carbon; D006861:Hydrogen Peroxide