In situ FTIR spektroskopie: Mocný nástroj pro studium katalyzátorů pro snižování emisí dusíkatých látek.

Abstract

This thesis focuses on the optimization of measurement methodology using in situ FTIR spectroscopy for the study of catalysts designed to reduce nitrogen oxide (NO) emissions. The main goal was not to analyze the reaction mechanisms in detail, but rather to establish and validate the experimental procedure using a HTHP (High Temperature High Pressure) reaction cell (Specac). Measurements were performed on a metal pellet and Co–Mn–Al mixed oxides, both undoped (inactive) and potassium-doped (active catalyst). A systematic study was carried out under varying experimental conditions, including spectral resolution, NO concentration, temperature, adsorption time, and gas atmosphere. The results demonstrated that the optimized methodology reliably captures the evolution of absorption bands corresponding to various surface species (e.g., NO, NO⁺, NO₂⁻), thereby providing valuable insights into surface processes. These findings form a foundation for future studies on NO decomposition mechanisms and the development of more efficient catalytic materials. The work also confirms that precise control of experimental parameters is essential for achieving reproducible and interpretable data when using in situ techniques.