In situ dual-beam coincidence second harmonic generation as a probe of spatially resolved dynamics at electrochemical interfaces

Boguslaw Pozniak, Daniel Alberto Scherson

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

In situ dual-beam coincidence second harmonic generation was used to monitor spatially resolved dynamics at the Pt(111)/CO-saturated 0.1 M HClO4 interface. The results obtained showed that, for potential steps from 30 to about 870 mV vs RHE, the full electrooxidation of CO as evidenced from SHG occurred at different times for the two areas of the Pt(111) surface probed by the beams. On this basis, the diffusional rates of adsorbed CO cannot be assumed to be generally large enough as to render the entire surface in a homogeneous state, as invoked by the mean field approximation model.

Original languageEnglish
Pages (from-to)14696-14697
Number of pages2
JournalJournal of the American Chemical Society
Volume126
Issue number45
DOIs
Publication statusPublished - 2004 Nov 17
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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