Neutron vibrational spectroscopy of hydrogen and deuterium on Raney nickel

Journal Article · Sun Aug 01 04:00:00 EDT 1982 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.443935· OSTI ID:5146502

Cavanagh, R R; Kelley, R D; Rush, J J

Incoherent neutron inelastic scattering has been applied to the study of the chemisorption of hydrogen and deuterium on Raney nickel (a high surface area nickel powder). The binding sites have been identified by comparing the vibrational frequencies and intensities provided by the inelastic scattering with calculations for model structures of different geometries, force constants, and symmetries. We conclude that, on Raney nickel above 150 K, hydrogen chemisorbs predominantly in sites of threefold symmetry. The ''best fit'' corresponds to a Ni--H bond distance of 1.88 +- 0.03 A and a force constant of 0.58 +- 0.03 mdyn/A. In addition, we have observed lateral adsorbate interactions, deuterium isotope shifts, and temperature dependent binding sites.

• Research Organization: National Measurements Laboratory, National Bureau of Standards, Washington, D.C. 20234
• OSTI ID: 5146502
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 77:3; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CHEMICAL REACTIONS
CHEMISORPTION
COHERENT SCATTERING
DEUTERIUM
DIFFRACTION
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HYDROGEN
HYDROGEN ISOTOPES
ISOTOPE EFFECTS
ISOTOPES
LIGHT NUCLEI
METALS
NEUTRON DIFFRACTION
NICKEL
NONMETALS
NUCLEI
ODD-ODD NUCLEI
POWDERS
SCATTERING
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SPECTRAL SHIFT
STABLE ISOTOPES
SURFACE PROPERTIES
TRANSITION ELEMENTS
VIBRATIONAL STATES