Electrode formed by silver nanoparticles has been obtained by a new method according to the self-assemble and electrochemical-assemble principles, which is capped by MPA and fabricated silver nanoparticles monolayer a...Electrode formed by silver nanoparticles has been obtained by a new method according to the self-assemble and electrochemical-assemble principles, which is capped by MPA and fabricated silver nanoparticles monolayer and multilayer films on pre-modified gold electrode. The performance of this modified electrode was studied by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS). The CV curve indicates that modified electrode 3(Ag-MPA)/2PDDA/4-ATP/Au was more active and steady than the others, and the EIS implies that the electrochemical impedance increased. The CV current of multilayer modified electrode was obviously higher than monolayer modified electrode in 0.5 mmol·L-1 K3 Fe(CN)6 solution.展开更多
The electrochemical behavior of SiCuW11 heteropolyacide in acidic aqueous solution was studied. The effect of solution pH on the electrochemical behavior of SiCuW11 was discussed and the mechanism was suggested. New e...The electrochemical behavior of SiCuW11 heteropolyacide in acidic aqueous solution was studied. The effect of solution pH on the electrochemical behavior of SiCuW11 was discussed and the mechanism was suggested. New electrode was modified by multilayer films composed of heteropolyanion (SiCuW11) and cationic polymer poly (diallyldimethylammonium chloride). Cyclic voltammetry showed the uniform growth of the film. The modified electrodes exhibited some special electrochemical properties in the films, different from those in homogeneous aqueous solutions. The effect of pH on the redox behavior of SiCuW11 in the films was discussed in details. The multilayer film electrodes have an excellent electrocatalytic response to the reduction of BrO3- and NO2-.展开更多
文摘Electrode formed by silver nanoparticles has been obtained by a new method according to the self-assemble and electrochemical-assemble principles, which is capped by MPA and fabricated silver nanoparticles monolayer and multilayer films on pre-modified gold electrode. The performance of this modified electrode was studied by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS). The CV curve indicates that modified electrode 3(Ag-MPA)/2PDDA/4-ATP/Au was more active and steady than the others, and the EIS implies that the electrochemical impedance increased. The CV current of multilayer modified electrode was obviously higher than monolayer modified electrode in 0.5 mmol·L-1 K3 Fe(CN)6 solution.
文摘The electrochemical behavior of SiCuW11 heteropolyacide in acidic aqueous solution was studied. The effect of solution pH on the electrochemical behavior of SiCuW11 was discussed and the mechanism was suggested. New electrode was modified by multilayer films composed of heteropolyanion (SiCuW11) and cationic polymer poly (diallyldimethylammonium chloride). Cyclic voltammetry showed the uniform growth of the film. The modified electrodes exhibited some special electrochemical properties in the films, different from those in homogeneous aqueous solutions. The effect of pH on the redox behavior of SiCuW11 in the films was discussed in details. The multilayer film electrodes have an excellent electrocatalytic response to the reduction of BrO3- and NO2-.
