The cathodic reduction mechanism of MnO2 electrode is studied by means of the rotating ring-disk electrode. The mass transport process in the solution plays an important role in the reduction process of MnO2 electrode...The cathodic reduction mechanism of MnO2 electrode is studied by means of the rotating ring-disk electrode. The mass transport process in the solution plays an important role in the reduction process of MnO2 electrode. The relation between IR-1 and ω-1/2 is deduced as a diagnostic criterion of the reduction medianism. The dissolutionprecipitation and the electron-proton mechanism occur simultaneously but the relative contributions are qulte different in various pH value solutions.展开更多
The electrochemical behaviors of Mn 3+ /Mn 2+ redox couple used as the cathodic electroactive material in a new electrochemical storing energy system (redox flow cell) were studied by means of RDE techniques on platin...The electrochemical behaviors of Mn 3+ /Mn 2+ redox couple used as the cathodic electroactive material in a new electrochemical storing energy system (redox flow cell) were studied by means of RDE techniques on platinum electrode.The experiment results showed that kinetics of electrode process was controlled by mass transported on the static Pteledtrode;and on RDE electron transfer and/or mass transport could become the rate controlling step of the electrode process depending on the magnitude of the overpotential and the rotating speed of RDE.展开更多
文摘The cathodic reduction mechanism of MnO2 electrode is studied by means of the rotating ring-disk electrode. The mass transport process in the solution plays an important role in the reduction process of MnO2 electrode. The relation between IR-1 and ω-1/2 is deduced as a diagnostic criterion of the reduction medianism. The dissolutionprecipitation and the electron-proton mechanism occur simultaneously but the relative contributions are qulte different in various pH value solutions.
文摘The electrochemical behaviors of Mn 3+ /Mn 2+ redox couple used as the cathodic electroactive material in a new electrochemical storing energy system (redox flow cell) were studied by means of RDE techniques on platinum electrode.The experiment results showed that kinetics of electrode process was controlled by mass transported on the static Pteledtrode;and on RDE electron transfer and/or mass transport could become the rate controlling step of the electrode process depending on the magnitude of the overpotential and the rotating speed of RDE.
