DMFC膜电极界面微环境中动力学特性与催化剂性能高效表达研究

针对直接甲醇燃料电池（DMFC）阳极催化剂在膜电极（MEA）的性能表现达不到常规电化学测试性能的现象，通过深入研究催化剂粒子表界面微观环境特性，理解MEA表界面微环境中催化剂粒子对甲醇氧化反应的动力学行为，充分认识膜电极组成、界面微观结构、催化剂利用率、反应条件对催化剂效能表达的影响因素，阐明MEA三相界面微观区域结构-物质传输规律-电极/电池性能之间的对应关系，提出催化剂高性能表达的MEA构建原则和科学依据。

Aim at solving the problem that lower catalyst performance are always obtained from in-situ fuel cell than in electrochemical cell , the key differences of the two testing systems, including both charge transfer and mass transfer processes during reaction will be studied in-depth. The influence of MEA composition, electrode microstructure, and reaction conditions on catalysts performance will be researched. The dependency of mass transfer and cell performance on the MEA three-phase interface micro structure will be discussed. Effective strategy for building highly efficient electrode structure will be given. Knowledge thus gained will guide future advancement in catalysts utilization, MEA structure, and cell performance.