Fourier transform infrared spectroscopy study of CO Electro-oxidation on Pt(111) in Alkaline Media

Research output: Contribution to journalArticle

Authors

Colleges, School and Institutes

External organisations

  • Leiden University
  • Leiden Institute of Chemistry
  • Energy Research Centre of the Netherlands (ECN)

Abstract

In this work we investigate the electro-oxidation of CO on Pt(111) in alkaline solution by using Fourier transform infrared spectroscopy (FTIRS), to determine the adsorption sites of the CO, the intermediate species and the final oxidation product as a function of the applied potential. Multiple CO vibration bands (on-top, bridge and 3-fold hollow site) are observed on the Pt(111) electrode, their distribution and potential dependence being strongly dependent on the surface treatment. Spectroscopic results show that the final reaction product is carbonate and suggest that adsorbed carbonate blocks the access of CO from the (111) terrace to the active sites (i.e., step and kink sites).

Details

Original languageEnglish
Pages (from-to)13661-13666
Number of pages6
JournalLangmuir
Volume25
Issue number23
Publication statusPublished - 1 Dec 2009