Abstract: The formation of various oxygen states at the surface of silver catalysts for ethylene epoxidation was studied by the kinetic isotope method with the isotope oxygen-18. Relaxation of both chemical and isotope compositions of the reaction products was monitored. The difference between isotope compositions of ethylene oxide and carbon dioxide in time was found. Increases in the amount of exchangeable oxygen and in the relaxation time of the isotope composition of the reaction products with increasing dispersion and surface defectivity of silver particles was revealed. It was confirmed that two states of atomic adsorbed oxygen take part in epoxidation and deep oxidation of ethylene. The conclusion was drawn that electrophilic oxygen, which is responsible for ethylene epoxidation, is formed from the nucleophilic form (surface oxygen of silver oxide) via subsurface oxygen.

Cite: Bulushev D.A. , Balʹzhinimaev B.S.
Kinetic Isotope Study of the States of Oxygen Adsorbed on Silver Catalysts for Ethylene Epoxidation
Kinetics and Catalysis. 1996. V.37. N1. P.140-145. WOS Scopus РИНЦ ANCAN

Original: Булушев Д.А. , Бальжинимаев Б.С.
Исследование состояний адсорбированного кислорода на серебряных катализаторах эпоксидирования этилена изотопно-кинетическим методом
Кинетика и катализ. 1996. Т.37. №1. С.149-154. РИНЦ

Dates:

Submitted:

Nov 23, 1994

Identifiers:

Web of science:	WOS:A1996TY56500024
Scopus:	2-s2.0-0347241960
Elibrary:	13249404
Chemical Abstracts:	1996:149036
Chemical Abstracts (print):	124:288587

Citing:

DB	Citing
Web of science	6
Scopus	3
Elibrary	3