Dynamics of the interaction of ethane with Ir(110)-(1 times 2)

Journal Article · Tue May 01 04:00:00 EDT 1990 · Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA)

DOI:https://doi.org/10.1116/1.576715· OSTI ID:6861637

Mullins, C B ^[1]; Weinberg, W H ^[2]

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1. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA (USA)
2. Department of Chemical Engineering, University of California, Santa Barbara, CA (USA)

Experimentally determined values of the initial adsorption probability of ethane on Ir(110)-(1{times}2) are presented which probe the dynamics of the interaction. The data were obtained from supersonic molecular beam measurements with an incident kinetic energy {ital E}{sub {ital i}} ranging between 1.2 and 24 kcal/mol, surface temperatures {ital T}{sub {ital S}} between 77 and 550 K, and incident angle {theta}{sub {ital i}} between 0{degree} and 45{degree}. Experimentally determined values of the initial trapping probability {zeta}{sub 0} of ethane into a physically adsorbed state at {ital T}{sub {ital S}}=77 K as a function of {ital E}{sub {ital i}} and {theta}{sub {ital i}} and experimentally determined values of the initial probability of dissociative chemisorption {ital S}{sub 0} as a function of {ital E}{sub {ital i}},{theta}{sub {ital i}}, and {ital T}{sub {ital S}} are presented. The value of {zeta}{sub 0} is found to decrease with increasing {ital E}{sub {ital i}} consistent with the fact that an increasingly larger fraction of the incident kinetic energy must be dissipated in order for the molecule to physically adsorb.

• DOE Contract Number: FG03-89ER14048
• OSTI ID: 6861637
• Journal Information: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA), Journal Name: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA) Journal Issue: 3 Vol. 8:3; ISSN JVTAD; ISSN 0734-2101
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
656003* -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
ALKANES
BEAMS
CHEMICAL REACTIONS
CHEMISORPTION
DATA
ELEMENTS
ETHANE
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDROCARBONS
INFORMATION
IRIDIUM
METALS
MOLECULAR BEAMS
NUMERICAL DATA
ORGANIC COMPOUNDS
PLATINUM METALS
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
TRAPPING
VERY HIGH TEMPERATURE