Ethylene Adsorption and Reaction on Pd(111): An Angle-Dependent EELS Analysis.

reportActive / Technical Report | Accession Number: ADA109722 | Open PDF

Abstract:

The chemisorption and surface reactivity of ethylene on a palladium 111 surface near room temperature has been studied by high-resolution electron energy loss spectroscopy EELS. The C2H4 molecule reacts with the Pd111 surface to form a rather stable surface species which is identified as ethylidyne C3-CH3 by analysis of the EELS vibrational spectra. This molecule is also formed on Pt111 and Rh111 and is believed to be symmetrically bonded at threefold surface sites. Angle-dependent EELS spectra are reported and show the relative importance of impact and dipole excitation mechanisms Off-specular data is found to be of critical importance in drawing conclusions about surface bonding symmetry from EELS spectra.

Author(s):
Kesmodel, L. L. ; Gates, J. A.
Author Organization(s):
INDIANA UNIV AT BLOOMINGTON DEPT OF PHYSICS
Descriptive Note:
Technical rept.,
Pagination:
0020

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-2
Contract/Grant Number(s):
N00014-80-C-0147
 Subject Terms
Joint Capability Areas:
JCA_6.3.3_Spectrum Management; JCA_5_Command and Control; JCA_6.3_Net Management; JCA_6_Net Centric; JCA_1_Force Support; JCA_5.3_Planning; JCA_1.3_Human Capital Management; JCA_1.3.2_Personnel Management; JCA_1.2_Force Preparation; JCA_1.2.3_Educating
Modernization Areas:
Fully Networked C3
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*ETHYLENE, *ELECTRON ENERGY, *LOSSES, *ABSORPTION SPECTRA, *ELECTRON SPECTROSCOPY, STABILITY, REACTION KINETICS, HIGH RESOLUTION, SURFACES, CHEMICAL BONDS, SYMMETRY, MOLECULE MOLECULE INTERACTIONS, PALLADIUM, CHEMISORPTION, VIBRATIONAL SPECTRA
Field(s)/Group(s):
Atomic and Molecular Physics and Spectroscopy
Keyword(s):
Electron energy loss spectroscopy, Ethylidine
Report Date:
1981 Dec 28