Solid Electrolyte Aided Study of Catalytic and Electrocatalytic Oxidations

固体电解质电位法(SEP)是一种原位电化学技术，用于监测吸附在催化剂表面的氧的热力学活性。为此，在氧浓度固体电解槽中对催化反应进行了研究。电池的一个电极暴露在环境空气中(参照物)，另一个电极用作研究中的催化剂。将SEP与动力学测量相结合，研究了钯和银催化剂上氢的催化氧化。通过在燃料电池模式下运行固体电解质电池，在700oC以上的温度下，可以在产生电能的同时获得有用的氧化产物。将研究在稳定的氧化锆槽中，用铂-铑合金电极氧化甲烷-氨混合物以联产电能和氰化氢。以类似的方式研究了甲烷将转化为氧化二聚产物(乙烷和乙烯)的固态燃料电池的产品选择性和功率输出特性。

Solid electrolyte potentiometry (SEP) is an in situ electrochemical technique used to monitor the thermodynamic activity of oxygen adsorbed on catalytic surfaces. To this end the catalytic reaction is studied in an oxygen concentration solid electrolyte cell. One electrode of the cell is exposed to the ambient air (reference) and the other serves as the catalyst under study. SEP is used in conjunction with kinetic measurements in order to study the catalytic oxidation of hydrogen over palladium and silver catalysts. By operating the solid-electrolyte cell in the fuel-cell mode and at temperatures above 700oC useful oxidation products can be obtained with simultaneous generation of electrical energy. The cogeneration of electricity and hydrogen cyanide by oxidizing methane-ammonia mixtures in a stabilized zirconia cell with platinum-rhodium alloy electrodes will be examined. In a similar manner the product selectivity and power output characteristics of a solid-state fuel cell in which methane will be converted to oxidative dimerization products (ethane and ethylene) is studied.