Reaction of carbon monoxide with chemisorbed oxygen on (111) and (110) faces of iridium

Journal Article · · Kinet. Catal. (Engl. Transl.); (United States)

OSTI ID:6577843

Ivanov, V P; Boreskov, G K; Savchenko, V I; Tataurov, V L

Using the methods of low-energy electron diffraction (LEED), Auger electron spectroscopy (AES), kinetic titration (KT), and thermodesorption (TD), the authors have studied the reaction of CI with chemisorbed oxygen on the (111) and (110) faces of Ir. They have determined the kinetic constants of the reaction and have shown that the initial rate of the reaction between CO and O/sub chem/ (W/sub CO/sub 2///sup 2/)/sup 0/ on Ir (111) is proportional to the degree of thermal disordering of the (2 x 1)O oxygen layer. On Ir (110), microfaceted with (111) faces, W/sup 0//sub CO/sub 2//sup 0// at 330/sup 0/K is more than an order of magnitude greater than the rate of the reaction with Ir (111) - (2 x 1)O. This may be connected with structural disordering of the oxygen layer on the surface defects (hills and valleys of the microfacets).

• Research Organization: Inst. of Catalysis, Novosibirsk, USSR
• OSTI ID: 6577843
• Journal Information: Kinet. Catal. (Engl. Transl.); (United States), Journal Name: Kinet. Catal. (Engl. Transl.); (United States) Vol. 24:4; ISSN KICAA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
02 PETROLEUM
020800 -- Petroleum-- Waste Management
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
ELEMENTS
IRIDIUM
KINETICS
METALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
TRANSITION ELEMENTS