Coadsorption Chemistry of H2 and C2N2 on Pt(111): A Common Intermediate in the Hydrogenation of Cyanogen and the Dehydrogenation of Ethylenediamine on Pt(111).

Abstract

The adsorption of C2N2 on Pt(111) results in two desorption states (alpha, beta). The alpha state, T max = 368K, is due to the desorption of molecularly adsorbed C2N2. The beta state, T max = 780K, may be due to the recombination of adsorbed CN groups or the decomposition of an extended (CN)x polymer. Coadsorption of H2 and C2N2 results in a surface nitrene which decomposes to give back H2 and C2N2 at 430K. Decomposition of ethylenediamine results in the same species. Dehydrogenation of ethylene-diamine shows that the amine hydrogens are removed first in this process followed at 430K by the removal of the hydrogens from the carbons liberating C2N2 as the final product.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1979
Accession Number
ADA137270

Entities

People

  • J. C. Hemminger
  • J. R. Kingsley

Organizations

  • University of California, Irvine

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Adsorption
  • Alkenes
  • Auger Electron Spectroscopy
  • Auger Electrons
  • California
  • Chemistry
  • Crystal Structure
  • Cyanides
  • Dehydrogenation
  • Desorption
  • Electron Spectroscopy
  • Hydrogen
  • Mass Spectrometers
  • Measurement
  • Self Assembly
  • Spectra
  • Spectrometry

Fields of Study

  • Chemistry

Readers

  • Analytical Mechanics
  • Combustion science or combustion engineering.
  • Organic Chemistry