Accession Number:

ADA222745

Title:

A HREELS Investigation of Ethylene on Pt Model Catalysts

Descriptive Note:

Technical rept.

Corporate Author:

INDIANA UNIV AT BLOOMINGTON DEPT OF PHYSICS

Personal Author(s):

Report Date:

1990-05-20

Pagination or Media Count:

19.0

Abstract:

The adsorption of C2H4 on supported Pt model catalysts is investigated with High Resolution Electron Energy Loss Spectroscopy for the cases of Pt Platinum vapor deposited on an oxidized Al aluminum foil and a single crystal of TiO2 titanium dioxide. At 160 K the HREELS spectra show evidence of the di-sigma bonded ethylene species present on the supported Pt Platinum clusters, but upon warming to 325 K, only the TiO2 titanium dioxide supported model catalyst shows evidence of forming the ethylidyne species commonly seen on Pt Platinum 111 single crystals. The oxidized Al aluminum supported species begins to decompose by 250 K, and no spectra characteristic of ethylidyne has been seen. In the case of the TiO2 titanium dioxide supported model catalyst, we believe this is the first HREELS observation of ethylidyne on supported metal clusters. JG

Subject Categories:

  • Organic Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE