Solid Electrolyte Aided Study of Catalytic and Electrocatalytic Oxidations

固体电解质辅助催化和电催化氧化研究

• 批准号: 8711870
• 负责人: Michael Stoukides
• 金额: $ 13.73万
• 依托单位: Tufts University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-10-15 至 1990-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8711870&HistoricalAwards=false
• 关键词: Solid; Electrolyte; Aided; Study; Catalytic

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.

固体电解质电位法（SEP）是一种原位电化学技术，用于监测氧吸附在催化表面的热力学活性。为此，在氧浓固体电解质电池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（参考），另一个电极作为研究中的催化剂。为了研究氢在钯和银催化剂上的催化氧化，SEP与动力学测量一起使用。在燃料电池模式下，在700℃以上的温度下操作固体电解质电池，可以获得有用的氧化产物，同时产生电能。研究了在稳定的氧化锆电池中用铂铑合金电极氧化甲烷-氨混合物产生电和氰化氢的热电联产。以类似的方式研究了甲烷转化为氧化二聚化产物（乙烷和乙烯）的固态燃料电池的产物选择性和功率输出特性。