The monograph is devoted to the application of infrared spectroscopy in adsorption, chemisorption and catalysis. Three chapters were written by A.V. Kiselev and V.I. Lygin. The book summarizes all the material available before 1966 according to the method and results of research by this method of adsorption and chemisorption of molecules by metals, oxides, zeolites and clays. The book is of great interest to a wide range of physicochemists - specialists working in the field of catalysis, chromatographic methods of analysis and adsorption methods of separation of organic substances, spectral methods of analysis, filling of polymer materials.