Chemisorption and Reaction of Oxygen and Carbon-Monoxide on (110) Plane of an Iridium Single-Crystal Conference Abstracts
Conference |
III Советско-американский симпозиум по катализу 05-07 Jul 1976 , Киев |
||||||
---|---|---|---|---|---|---|---|
Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
||||||
Output data | Year: 1977, Volume: 18, Number: 3, Pages: 481-482 Pages count : 2 | ||||||
Authors |
|
||||||
Affiliations |
|
Abstract:
LEED and Auger electron spectroscopy and thermodesorption with mass spectrometric anal. at 300-800 K and 10-9-10-7 torr were used to study chemisorption and reaction of O and CO2 on the Ir (110) crystal face. O diffusion in near-surface layers of the crystal leads to micro-faceting of the (110) surface with formation of the denser (111) boundaries. At 325 K, undissocd. CO2 is adsorbed with initial sticking coeff. 1 and max. conc. 1015 mol/cm2. Ordered structures are not formed. Desorption spectra show 3 states with 1st order desorption kinetics and activation energies 37, 31, and 26 kcal/mol. O2 is adsorbed at 325 K with initial sticking coeff. 0.26 and max. coverage ∼1015 atoms/cm2 forming a 21D structure. Desorption spectra show 2 states with 2nd order desorption kinetics and activation energies ∼56 and 70 kcal/mol and a 3rd state with temp. max. peak at 1460 K caused by desorption of Ir oxides (1st order rate 1013s-1 with activation energy 89 kcal/mol). At 530 K, CO reacts with O in the adsorbed layer with activation energy 9-10 kcal/mol and pre-exponential factor 10-11cm2s-1 (limited by CO desorption).
Cite:
Ivanov V.P.
, Boreskov G.K.
, Savchenko V.I.
, Tataurov V.L.
, Egelhoff Jr. W.F.
, Weinberg W.H.
Chemisorption and Reaction of Oxygen and Carbon-Monoxide on (110) Plane of an Iridium Single-Crystal
Kinetics and Catalysis. 1977. V.18. N3. P.481-482. WOS РИНЦ
Chemisorption and Reaction of Oxygen and Carbon-Monoxide on (110) Plane of an Iridium Single-Crystal
Kinetics and Catalysis. 1977. V.18. N3. P.481-482. WOS РИНЦ
Original:
Иванов В.П.
, Боресков Г.К.
, Савченко В.И.
, Татауров В.Л.
, Эгельхофф В.Ф.
, Вайнберг В.Г.
Исследование хемосорбции и взаимодействия кислорода и окиси углерода на грани (110) монокристалла иридия
Кинетика и катализ. 1977. Т.18. №3. С.575-576. РИНЦ
Исследование хемосорбции и взаимодействия кислорода и окиси углерода на грани (110) монокристалла иридия
Кинетика и катализ. 1977. Т.18. №3. С.575-576. РИНЦ
Identifiers:
Web of science | WOS:A1977EG45000035 |
Elibrary | 30628975 |
Citing:
Пока нет цитирований