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

Related Subjects

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