Deuterium isotope effects for hydrocarbon reactions catalyzed over platinum single crystal surfaces

Journal Article · Thu Sep 01 00:00:00 EDT 1983 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(83)90036-2· OSTI ID:5728009

Davis, S M; Gillespie, W D; Somorjai, G A

The initial rates of isobutane, neopentane, cyclohexane, n-hexane, and n-heptane skeletal rearrangement reactions catalyzed in the presence of deuterium gas over the flat(111), stepped(13,1,1), and kinked(10,8,7) platinum single crystal surfaces were measured at atmospheric pressures and 520 to 640 K. Inverse isotope effects ((R/sub D//R/sub H/) = 1.3 to 3.3) were detected for a variety of hydrogenolysis, isomerization, and C/sub 5/ cyclization reactions. The inverse isotope effects that appear to arise from a combination of kinetic and thermodynamic isotope effects displayed magnitudes that were not dependent on the platinum surface structure. 6 figures, 3 tables.

• Research Organization: Lawrence Berkeley Lab., CA
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5728009
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 83:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

2-2-DIMETHYLPROPANE
2-METHYLPROPANE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
400201 -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400302* -- Organic Chemistry-- Isotope Effects-- (-1987)
ACTIVATION ENERGY
ALKANES
AROMATIZATION
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
CRYSTALS
CYCLOALKANES
CYCLOHEXANE
DATA
DEHYDROCYCLIZATION
DEHYDROGENATION
DEUTERIUM
ELEMENTS
ENERGY
EXPERIMENTAL DATA
HEPTANE
HEXANE
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN
HYDROGEN ISOTOPES
HYDROGENATION
INFORMATION
ISOMERIZATION
ISOTOPE EFFECTS
ISOTOPES
KINETICS
LIGHT NUCLEI
LOW PRESSURE
MEDIUM TEMPERATURE
METALS
MONOCRYSTALS
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
PLATINUM
PLATINUM METALS
PRESSURE DEPENDENCE
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TRANSITION ELEMENTS