The structure and proton conducting mechanism of solid polymer electrolyte (SPE) are described. Since the conductivity of electrolyte is important in SPE electrochemical cell research and development, we investigate q...The structure and proton conducting mechanism of solid polymer electrolyte (SPE) are described. Since the conductivity of electrolyte is important in SPE electrochemical cell research and development, we investigate quantitatively the conductivity of Nafion membrane and its dependence on temperature and relative humidity. Experimental results show that the conductivity of Nafion membrane increases with temperature and relative humidity. We also reports on the preparation and development of SPE membrane electrode with the emphasis on the mixture pressing method and impregnation-reduction process to prepare SPE composite electrode assemblies and their application to electrochemical sensors. We also investigate and fabricate a potentiometric electrochemical sensor of hydrogen and ethylene to measure the hydrogen and ethylene partial pressure.展开更多
The mechanism of electrocatalytic hydrogenation of benzene was investigated by electrochemical techniques——Rotating Electrode(RE),Cyclic Voltammetry(CV).Based on the experimental results and reasonable analysis,the ...The mechanism of electrocatalytic hydrogenation of benzene was investigated by electrochemical techniques——Rotating Electrode(RE),Cyclic Voltammetry(CV).Based on the experimental results and reasonable analysis,the following conclusions were drawn:benzene hydrogenation is a multi-step,irreversible and elelctrocatalytic process controlled mainly by diffusion on Pt and Hg electrodes.For electrochemical coupling of benzene hydrogenation and water electrolysis,the composite SPE electrode with optimum catalyst was applied.It was found that the process of benzene hydrogenation on SPE electrode was controlled by diffusion that was consistent with the behaviors of benzene on Pt and Hg electrodes,nevertheless the electrochemical hydrogenation voltage on electrode was different.展开更多
基金Supported by the National Natural Science Foundation of China (No. 29875002) and the Natural Science Foundation of Beijing (No. 2002017).
文摘The structure and proton conducting mechanism of solid polymer electrolyte (SPE) are described. Since the conductivity of electrolyte is important in SPE electrochemical cell research and development, we investigate quantitatively the conductivity of Nafion membrane and its dependence on temperature and relative humidity. Experimental results show that the conductivity of Nafion membrane increases with temperature and relative humidity. We also reports on the preparation and development of SPE membrane electrode with the emphasis on the mixture pressing method and impregnation-reduction process to prepare SPE composite electrode assemblies and their application to electrochemical sensors. We also investigate and fabricate a potentiometric electrochemical sensor of hydrogen and ethylene to measure the hydrogen and ethylene partial pressure.
文摘The mechanism of electrocatalytic hydrogenation of benzene was investigated by electrochemical techniques——Rotating Electrode(RE),Cyclic Voltammetry(CV).Based on the experimental results and reasonable analysis,the following conclusions were drawn:benzene hydrogenation is a multi-step,irreversible and elelctrocatalytic process controlled mainly by diffusion on Pt and Hg electrodes.For electrochemical coupling of benzene hydrogenation and water electrolysis,the composite SPE electrode with optimum catalyst was applied.It was found that the process of benzene hydrogenation on SPE electrode was controlled by diffusion that was consistent with the behaviors of benzene on Pt and Hg electrodes,nevertheless the electrochemical hydrogenation voltage on electrode was different.
