2-甲基吡啶在PbO2-SPE组合电极上的电氧化研究

分别采用热压法和热压-电镀法制备PbO2-SPE组合电极, 通过循环伏安和稳态极化曲线测量, 研究了这两种电极对2-甲基吡啶电氧化反应的电催化活性, 同时考察了工作电极电解液中有、无液相支持电解质电位与电流密度的关系及不同对电极电解液情况下, 电流密度与过电位和过电位与槽压的关系. 通过一般PbO2电极与热压-电镀法PbO2-SPE组合电极在电流密度与过电位和电流密度与槽压变化的比较, 发现热压-电镀法制备的PbO2-SPE组合电极在相同过电位下具有更高的电流密度, 在相同电流密度下具有较低的槽压.

Electrooxidation of 2-Methylpyridine at PbO2-SPE Composite Electrodes

The PbO_(2)-SPE composite electrodes were prepared by hot press and hot-pressed electroplating methods.The electrocatalytic activity of the PbO_2-SPE composite electrode to the electrooxidation reactions of 2-methylpyridine were studied with the cyclic voltammetry and steady state polarization curves.The relationships between the current density and overpotential and between the overpotential and cell voltage were examined in different electrolytes of the counter electrode,as well as the relationship between the current density and potential was also examined in the solution of the working electrode in the presence of or in the absence of the liquid supporting electrolyte.Also the relationships between the current density and overpotential and between the current density and cell voltage were compared between common PbO_2 electrode and PbO_2-SPE composite(electrode) prepared by hot press electroplating method.It was found that the latter possesses a high current(density) at the same overpotential or a low cell voltage at the same current density.