PHASE-ANALYSIS OF HETEROGENEOUS CATALYSTS BY THE STOICHIOGRAPHIC METHOD OF DIFFERENTIATING DISSOLUTION

The basic principles of the theory, methodology, and instrumental desi gn of a new reference-free chemical method of phase analysis, the meth od of differential dissolution, are described. The method is based on the laws of stoichiography, which determine the stoichiometry of mass exchange processes in the dynamic regime. The works devoted to the use of the differential dissolution method for phase analysis of heteroge neous catalysts of different types, compositions, and structures are r eviewed. Unique possibilities of this method are demonstrated for dete rmining quantitative and qualitative phase compositions of multiphase heterogeneous catalysts, including those with unknown phase compositio ns.