Hydrogenolysis of carbon and its catalysis by platinum

Journal Article · Tue Dec 01 04:00:00 EST 1981 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(81)90016-6· OSTI ID:5696618

Holstein, W L; Boudart, M

The hydrogenolysis of carbon to methane and its catalysis by platinum were studied above and below 1050 K, respectively. Hydrogen pressure varied between ca. 10 and 100 kPa. At 890 K and atmospheric pressure, platinum accelerated the rate of the uncatalyzed reaction by a factor of 2000. Reaction orders with respect to H/sub 2/ and kinetic isotope effects in H/sub 2/ and D/sub 2/ suggest rapid equilibration of the carbon surface with hydrogen followed by a rate-determining step involving breaking of a carbon-carbon bond. This step appears to be a true hydrogenolysis step with direct participation of hydrogen in the uncatalyzed reaction. But with platinum, the rate-determining step seems to lead to the formation of a carbon-platinum bond with subsequent reaction of the carbidic carbon on platinum.

• Research Organization: Stanford Univ., CA
• OSTI ID: 5696618
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 72:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

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ALKANES
CARBON
CATALYSIS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DATA
DEUTERIUM
ELEMENTS
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGEN ISOTOPES
HYDROGENATION
INFORMATION
ISOTOPE EFFECTS
ISOTOPES
KINETICS
LIGHT NUCLEI
METALS
METHANE
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
PLATINUM
PLATINUM METALS
PRESSURE DEPENDENCE
REACTION KINETICS
STABLE ISOTOPES
SYNTHESIS
TEMPERATURE EFFECTS
TRANSITION ELEMENTS