Structural-Chemical Activity Criteria for Catalysts of Deep Oxidation

摘要

The problem of the determination of the structural-chemical criteria of the redox-catalysts activity evaluation remains one actual for theory and practice of the catalysts synthesis. In the present work we used the industrial domestic catalysts AP-64 (0.62 wt % Pt on an aluminum γ-oxide), catalyst of production of the "Walker" company (USA) (0.2 wt % Pt on a cordierite carrier), and analytically pure cor-dierite. The data of the high resolution IR spectroscopy [1] and analysis of the oxygen thermal desorption [2] made it possible to reveal the special features of the electron-excited states and the factors, which cause the catalytic action. The spectrum of the most active platinum contact shows that the significant modification of the carrier surface in the process of the catalyst preparation, which is accompanied with the notable decrease in the specific surface area (86->18 m~2 g~(-1)), does not practically change the characteristic intensive IR- emission bands (1750, 1370, 1240, and 1050 cm~(-1)) that indicates the localization of the processes of cooperative interaction of the excited states in the bulk.