title: A ternary nanocomposite electrode of polyoxometalate/carbon nanotubes/gold nanoparticles for electrochemical detection of hydrogen peroxide.
abstract: In this work, a nanocomposite film electrode containing polyoxometalate (POM) clusters K6P2W18O62 (P2W18), carbon nanotubes (CNTs) and Au nanoparticles (AuNPs) was fabricated by a smart combination of layer-by-layer (LbL) with the self-assembly technique. The synergistic effect of POM, CNTs and AuNPs on the electrocatalysis of H2O2 was investigated to improve the sensitivity of H2O2 detection. The response of (P2W18/CNTs/P2W18/AuNPs)4 electrodes to H2O2 was remarkably enhanced due to large active sites and good electron conducting ability. The sensor exhibited a quick response (less than 1 second) to H2O2 with a high sensitivity (596.1 μAm M(-1) cm(-2)), and a low detection limit (52 nM). Based on the respective advantages of POMs, CNTs and AuNPs, the nanocomposite multilayer POMs/CNTs/POMs/AuNPs will have special properties and high potential for application.
authors.affiliation: Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, No. 5268 Renmin Street, Changchun 130024, PR China. linxu@nenu.edu.cn.
authors.forename: Shuyue
authors.initials: S
authors.lastname: Guo
authors.forename: Lin
authors.initials: L
authors.lastname: Xu
authors.forename: Bingbing
authors.initials: B
authors.lastname: Xu
authors.forename: Zhixia
authors.initials: Z
authors.lastname: Sun
authors.forename: Lihao
authors.initials: L
authors.lastname: Wang
mesh_terms: D015374:Biosensing Techniques / Q000379:methods; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000032:analysis*; D057230:Limit of Detection; D053768:Metal Nanoparticles / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D017973:Tungsten Compounds / Q000737:chemistry*; D000099294:Polyoxometalates
chemical_list: D006046:Gold; D006108:Graphite; D006861:Hydrogen Peroxide; D037742:Nanotubes, Carbon; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates