Electrochemical reduction and flow detection of iodate on (Bu4N)2Mo6O19 self-assembled monolayer.
A stable monolayer of the inorganic-organic hybrid polyoxometalate (Bu4N)2Mo6O19, denoted as Mo6O19, was formed on a sodium-3-mercapto-1-propanesulfonate (MPPS)-covered gold electrode surface, interlaced with an anionic poly(dimethyldiallylammonium chloride) (PDDA) binding layer based on the electrostatic self-assembled (ESA) technique. Electrochemical characterization of the Mo6O19 self-assembled thin films on the solid surface by cyclic voltammetry and AC impedance spectroscopy revealed a stable and sensitive electrocatalytic response to the reduction of iodate. Iodate was determined amperometrically through a flow injection cell at the modified electrode in the concentration range of 1.0 x 10(-6) to 1.0 x 10(-1) M with a detection limit of 8 x 10(-8) M (signal-to-noise ratio = 3). Performance was improved to meet practical needs compared with previously reported analogues.
Chen
Li
L
College of Chemistry, Jilin University, Changchun 130012, China.
Tian
Xuefei
X
Tian
Li
L
Liu
Li
L
Song
Wenbo
W
Xu
Hongding
H
D004563:Electrochemistry; D004566:Electrodes; D017022:Flow Injection Analysis / Q000379:methods; D006046:Gold / Q000737:chemistry; D007452:Iodates / Q000032:analysis*; D008567:Membranes, Artificial; D008982:Molybdenum / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D012680:Sensitivity and Specificity; D013499:Surface Properties
D007452:Iodates; D008567:Membranes, Artificial; D009942:Organometallic Compounds; D006046:Gold; D008982:Molybdenum