Hydrogen Adsorption at Nb(100): Photoemission Evidence of Two-Stage Exchange Involving Subsurface States

Abstract

Temperature dependent properties of electronic states resulting from hydrogen adsorption of Nb(100) surfaces have been studied by photoemission spectroscopy using synchrotron radiation. The most prominent hydrogen induced feature in photoemission spectra exhibits a temperature dependence that requires contributions from two distinct states. Analysis of the photon energy dependent cross section of the hydrogen induced features suggests that hydrogen chemisorption sites are located below the surface. These results have important consequences for kinetic models that attempt to account for hydrogen uptake by Nb. Keywords: Surface chemistry, Structure, Electronics properties, Surfaces, Niobium, Reprints.

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Document Details

Document Type
Technical Report
Publication Date
Apr 14, 1988
Accession Number
ADA207846

Entities

People

  • B. S. Fang
  • C. A. Ballentine
  • J. L. Erskine

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Auger Electron Spectroscopy
  • Auger Electrons
  • Chemisorption
  • Chemistry
  • Classification
  • Curve Fitting
  • Electric Fields
  • Electron Energy
  • Electron Spectroscopy
  • Electronic States
  • Radiation
  • Scattering
  • Spectra
  • Spectroscopy
  • Surface Chemistry
  • Synchrotron Radiation
  • Synchrotrons

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Quantum Chemistry

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene