Formation Mechanism, Structure, and Catalytic Activity of Phosphorous Promoted Silver Catalyst of the Ethylene Glycol Oxidation Process

摘要

Silver is widely used catalyst for the processes of ethylene epoxidation, synthesis of formaldehyde, glyoxal etc. For increasing of the selectivity a promoting substances of the various nature are added to the Ag catalyst. As such promoters increasing selectivity of the silver catalyst of the ethylene glycol oxidation process, phosphorous content compounds are used. Catalytic activity and mechanism of the P-content promoter action introduced in silver catalyst is not practically investigated now. The aim of the present work is study of catalytic activity of P-content Ag catalysts and also investigation of mechanism of formation of an active silver surface by methods XPS, AES, SEM and TPD.