Structure analysis and photochemistry of adsorbates on platinum and palladium surfaces. [1,2-dichloroethene]

Technical Report · Fri May 01 04:00:00 EDT 1987

OSTI ID:6510302

Grassian, V H

The vibrational spectra of benzene and toluene adsorbed on Pd(111) indicates at 180K these molecules weakly bond to the surface. The adsorption of benzene and toluene on Pt(111) is much stronger as indicated by large frequency shifts from gas phase values. Pyridine adsorption on both Pt(111) and Pd(111) was studied as a function of temperature. At room temperature pyridine decomposes on the surface to form an ..cap alpha..-pyridyl fragment (NC/sub 5/H/sub 4/) on Pt(111), whereas the molecule remains intact on Pd(111). The electron energy loss spectra of pyridine adsorbed on these surfaces is compared to the ir spectra of two osmium cluster compounds: Os/sub 3/(CO)/sub 11/(NC/sub 5/H/sub 5/), a pyridine complex, and HOs/sub 3/(CO)/sub 10/(NC/sub 5/H/sub 4/), a pyridyl complex. The stronger interaction of these molecules to the platinum surface is a consequence of the stronger bonding of the 5d orbitals as compared to the 4d orbitals. The uv photochemistry of 2-butene and 1,2-dichloroethene when adsorbed on Pt and Pd surfaces was also studied.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6510302
• Report Number(s): LBL-23388; ON: DE87010694
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400500 -- Photochemistry
ADSORPTION
ALKENES
ALKYLATED AROMATICS
AROMATICS
AZINES
BENZENE
BUTENES
CHEMICAL REACTIONS
CHLORINATED ALIPHATIC HYDROCARBONS
DECOMPOSITION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY LEVELS
ENERGY-LOSS SPECTROSCOPY
EXCITED STATES
HALOGENATED ALIPHATIC HYDROCARBONS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
METALS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PALLADIUM
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PLATINUM
PLATINUM METALS
PYRIDINE
PYRIDINES
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
SURFACE PROPERTIES
TOLUENE
TRANSITION ELEMENTS
VIBRATIONAL STATES