The collection is devoted to topical problems of heterogeneous catalysis - the nature and mechanism of chemical adsorption on solid bodies of the role of chemosorption in catalysis . It consists of the following sections: general issues of chemosorption and its role in catalysis; study of chemosorption by modern methods; chemosorption of gases on metals and semiconductors; chemosorption mechanisms in catalysis; influence of annealing and irradiation on chemosorption and catalytic properties of contacts . The collection is designed for scientists - chemists and physicists engaged in catalysis and adsorption, and can also be useful for teachers, graduate students and students specializing in relevant fields.