Dynamics of atomic hydrogen and deuterium recombination on the stepped Pt(557) crystal surface

Journal Article · Thu Jan 03 04:00:00 EST 1985 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100247a030· OSTI ID:5788371

Lin, T H; Somorjai, G A

The velocity distribution of HD produced on the Pt(557) crystal surface from atomic hydrogen and deuterium incident beams is measured in the temperature range of 150-700 K. The striking results are that (1) the average kinetic energy of the desorbing HD increases as the crystal temperature decreases from 300 to 200 K; (2) at 200 K, the velocity distribution is considerably wider than the Maxwellian distribution and there is a significant amount of HD leaving the surface with translational energy corresponding to 1900 K; (3) for a fraction of the incident atoms, the residence time decreases as the crystal temperature decreases from 300 to 200 K. It appears that some of the incident atoms can react with chemisorbed atoms at high coverage before they achieve thermal equilibrium with the surface. 21 references, 5 figures.

• Research Organization: Univ. of California, Berkeley
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5788371
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Journal Issue: 1 Vol. 89:1; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400203* -- Isotope Exchange & Isotope Separation-- (-1987)
ATOMIC BEAMS
BEAMS
CHEMICAL REACTIONS
DATA
DESORPTION
DEUTERATION
DEUTERIDES
DEUTERIUM
DEUTERIUM COMPOUNDS
ELEMENTS
ENERGY
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN DEUTERIDE
HYDROGEN ISOTOPES
HYDROGENATION
INFORMATION
ISOTOPES
KINETIC ENERGY
LIGHT NUCLEI
MEDIUM TEMPERATURE
METALS
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
PLATINUM
PLATINUM METALS
POTENTIAL ENERGY
SCATTERING
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TIME-OF-FLIGHT METHOD
TRANSITION ELEMENTS