Several techniques are commonly used for vibration analysis in catalysis: 1. Infrared (IR) Spectroscopy: This technique measures the absorption of infrared light by the molecule, which causes vibrations. It is particularly useful for identifying functional groups and studying surface interactions. 2. Raman Spectroscopy: Complementary to IR spectroscopy, Raman spectroscopy involves the scattering of light. It is beneficial for studying non-polar bonds and provides information about molecular vibrations that are IR-inactive. 3. Inelastic Neutron Scattering (INS): This technique uses neutrons to probe the vibrations of atoms. It is highly sensitive to hydrogen atoms and can provide detailed information about the catalyst's structure.