Electrochemical Betted not only can obtain the conducting film of polyaniline on a glass carbon electrode, but also can imobilize PMo_(12)O_(40)^(3-) in the film to form a organic conducting film electrode modified by...Electrochemical Betted not only can obtain the conducting film of polyaniline on a glass carbon electrode, but also can imobilize PMo_(12)O_(40)^(3-) in the film to form a organic conducting film electrode modified by heteropolyanion.The paper here reports electrochemical changes in the preparation of PMo_(12)O_(40)^(3-)-polyaniline modified electrode, the electrochemical reaction mechanism of the modified electrode was obtained from the study on its redox properties.Moreover, the above electrode showed marked electrocatalysis for the reduction reaction of CIO_(?)^-.展开更多
A reflux-treatment of soluble polyaniline(SPA)in dimethylformamide(DMF)containing CoCl_2 yields an active catalyst for dioxygen reduction which can be adsorbed on the electrode surface firmly.The catalytic reduction o...A reflux-treatment of soluble polyaniline(SPA)in dimethylformamide(DMF)containing CoCl_2 yields an active catalyst for dioxygen reduction which can be adsorbed on the electrode surface firmly.The catalytic reduction of dioxygen at the glassy carbon(GC)electrode modified by the cata- lyst was studied with cyclic voltammetry(CV),rotating disk electrode(RDE)and rotating ring-disk electrode(RRDE).The kinetic process of dioxygen reduction at the modified electrode was analyzed with a new RRDE theory dealing with a nondiffusion-controlled process on ring electrode.The rate constants for each scheme of dioxygen reduction were calculated,showing that only 2-electron reduction to H_2O_2 was conducted at the modified electrode.The effect of solution acidity on the electrocatalytic behaviour for dioxygen reduction was investigated.A possibility of initiating catalytic activity for dioxygen reduction was explored with ESCA method.展开更多
文摘Electrochemical Betted not only can obtain the conducting film of polyaniline on a glass carbon electrode, but also can imobilize PMo_(12)O_(40)^(3-) in the film to form a organic conducting film electrode modified by heteropolyanion.The paper here reports electrochemical changes in the preparation of PMo_(12)O_(40)^(3-)-polyaniline modified electrode, the electrochemical reaction mechanism of the modified electrode was obtained from the study on its redox properties.Moreover, the above electrode showed marked electrocatalysis for the reduction reaction of CIO_(?)^-.
文摘A reflux-treatment of soluble polyaniline(SPA)in dimethylformamide(DMF)containing CoCl_2 yields an active catalyst for dioxygen reduction which can be adsorbed on the electrode surface firmly.The catalytic reduction of dioxygen at the glassy carbon(GC)electrode modified by the cata- lyst was studied with cyclic voltammetry(CV),rotating disk electrode(RDE)and rotating ring-disk electrode(RRDE).The kinetic process of dioxygen reduction at the modified electrode was analyzed with a new RRDE theory dealing with a nondiffusion-controlled process on ring electrode.The rate constants for each scheme of dioxygen reduction were calculated,showing that only 2-electron reduction to H_2O_2 was conducted at the modified electrode.The effect of solution acidity on the electrocatalytic behaviour for dioxygen reduction was investigated.A possibility of initiating catalytic activity for dioxygen reduction was explored with ESCA method.
