A HREELS Investigation of Ethylene on Pt Model Catalysts

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)

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Document Details

Document Type
Technical Report
Publication Date
May 20, 1990
Accession Number
ADA222745

Entities

People

  • D. A. Hensley
  • L. L. Kesmodel

Organizations

  • Indiana University Bloomington

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Abstracts
  • Alkenes
  • Catalysts
  • Crystals
  • Electron Energy
  • Electrons
  • Ethylenes
  • High Resolution
  • Measurement
  • Metal Oxides
  • Metals
  • Platinum
  • Scattering
  • Single Crystals
  • Spectra
  • Spectroscopy
  • Transition Metals

Fields of Study

  • Chemistry

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene