Correlation of the broadband electric and catalytic properties of zeolite based NH3/SCR catalyst materials

研究催化剂材料的电性能及其与催化性能的相关性具有很高的学术和技术意义。到目前为止，人们的注意力主要集中在电子导电材料上，其中气体的化学吸附导致导带或价带中载流子密度的变化，这可以分别通过电导率或介电常数的变化来检测。同时分析的产品应导致访问的结构-性能-关系和更好地了解基本的基本过程，并最终改进的催化剂design.Aim的这个项目是分析状态的沸石为基础的，质子传导NH3-SCR催化剂通过在一个宽的频率范围内的电测量。两个项目合作伙伴的互补焦点是微观理解和修改的电荷载体传输依赖于沸石的催化性能和汽车催化剂的原位状态分析，通过阻抗和高频光谱。本计画将跨越一座桥梁，从微观的电性理解，到应用于汽车触媒装置的宏观模型。该方法是以知识为基础的，涵盖了科学、微观理解到工程模型的规模。

Investigations of the electric properties of catalyst materials and their correlation with the catalytic properties are of high academic and technical relevance. Up to now the attention has been preferentially paid to electron-conducting materials, where chemisorption of gases leads to a change in charge carrier density in the conduction or valance band, which can be detected by a change in conductivity or permittivity, respectively. Simultaneous analysis of the products should lead to access structure-property-relations and to a better understanding of the basic elementary processes and eventually to an improved catalyst design.Aim of this project is to analyze the state of zeolite-based, proton-conducting NH3-SCR-catalysts by means of electrical measurements over a broad frequency range. The complementary foci of both project partners are the microscopic understanding and modification of charge carrier transport in addiction to catalytic properties of zeolites and the in situ state analysis of automotive catalysts by means of impedance and high frequency spectroscopy. This project should span a bridge from the microscopic understanding of the electrical properties to the macroscopic model applied for automotive catalyst devices. The approach is knowledge-based overarching the scale of scientific, microscopic understanding up to the engineering model.