The NOx waste stream from automobile exhaust includes species such as NO and NO2. Catalysts that convert these species to N2 are desirable to reduce air pollution. Design a spectroscopic experiment to monitor the conversion of NOx into N2, describing what wavelengths of light need to be monitored as a function of time.

Spectroscopy is a technique used to measure the interaction of light with matter. It involves analyzing the light emitted, absorbed, or scattered by substances to identify their composition and concentration. In the context of monitoring NOx conversion, specific wavelengths corresponding to the absorption characteristics of NO, NO2, and N2 must be measured to track the reaction progress.

Different chemical species absorb light at specific wavelengths, which are determined by their electronic transitions. For NO and NO2, the relevant wavelengths typically fall within the ultraviolet and visible regions of the spectrum. Monitoring these wavelengths allows for the detection of the presence and concentration of these gases during the conversion process to N2.

Catalytic conversion refers to the process where a catalyst facilitates a chemical reaction, often lowering the activation energy required. In the case of NOx reduction, catalysts such as platinum or palladium can convert NO and NO2 into N2, a less harmful gas. Understanding the kinetics of this reaction is essential for designing an effective spectroscopic experiment to monitor the conversion over time.