The ALS provides high-resolution spectroscopic and imaging techniques that are essential for understanding the mechanisms of catalytic reactions. Techniques such as X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), and photoelectron spectroscopy (PES) can be used to study the active sites of catalysts, observe changes in oxidation states, and monitor the formation of reaction intermediates in real-time. This detailed information is critical for designing more efficient and selective catalysts.