title: An ultrasensitive iron(III)-complex based hydrogen peroxide electrochemical sensor based on a nonelectrocatalytic mechanism.
abstract: In this communication, the first nonelectrocatalysis-type hydrogen peroxide electrochemical sensor is reported. The electroactive iron(III) diethylenetriaminepentaacetic acid (DTPA-Fe(III)) complex is immobilized on the cysteamine (cys) modified nanoporous gold (NPG) films by covalent method. The immobilized DTPA-Fe(III) complex quickly communicates an electron with the electrode. Upon addition of hydrogen peroxide, however, hydrogen peroxide inhibits the direct electron transfer of the DTPA-Fe(III) complex due to the generation of nonelectroactive DTPA-Fe(III)-H2O2 complex. Based on quenching mechanism, the first hydrogen peroxide electrochemical sensor based on a nonelectrocatalytic mechanism is developed. The novel hydrogen peroxide electrochemical sensor has the ultralow detection limit (1.0×10(-14) M) and wide linear range (1.0×10(-13) to 1.0×10(-8) M) with excellent reproducibility and stability.
authors.affiliation: Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China.
authors.forename: Pan
authors.initials: P
authors.lastname: Li
authors.forename: Yu
authors.initials: Y
authors.lastname: Ding
authors.forename: Zhaoyang
authors.initials: Z
authors.lastname: Lu
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.forename: Yiming
authors.initials: Y
authors.lastname: Zhou
authors.forename: Yawen
authors.initials: Y
authors.lastname: Tang
authors.forename: Chenxin
authors.initials: C
authors.lastname: Cai
authors.forename: Tianhong
authors.initials: T
authors.lastname: Lu
mesh_terms: D015374:Biosensing Techniques / Q000379:methods* / Q000592:standards; D055664:Electrochemical Techniques / Q000379:methods* / Q000592:standards; D005290:Ferric Compounds / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; D006861:Hydrogen Peroxide