In situ core-electron spectroscopy of carbon monoxide adsorbed on high-area platinum in an acid electrolyte

In Tae Bae, Daniel Alberto Scherson

研究成果: Article査読

19 被引用数 (Scopus)

抄録

Modifications in the electronic density of states of small Pt particles (4-5 nm diameter) dispersed in high-area carbon (XC72-R) induced by the presence of adsorbed CO were examined by in situ Pt-L III -edge X-ray absorption near edge structure (XANES) in a 1.0 M H 3 P 4 solution. An increase in the intensity of the in situ Pt-L III -edge XANES was observed at energies a few electronvolts positive of the white line maximum (11 567 eV), after CO was bubbled in the solution, with the electrode polarized at potentials in the range in which CO undergoes irreversible adsorption on Pt. A well-defined peak centered at 11 570 eV could be clearly identified upon subtracting these spectra from those acquired in that same potential region prior to CO adsorption. This feature has been ascribed to transitions from the Pt 2p 3/2 orbital to unoccupied states above the Fermi level localized predominantly on CO.

本文言語English
ページ(範囲)19215-19217
ページ数3
ジャーナルJournal of physical chemistry
100
50
出版ステータスPublished - 1996 12 12
外部発表はい

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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