Determination of (111) ordered domains on platinum electrodes by irreversible adsorption of bismuth

Paramaconi Rodríguez, José Solla-Gullón, Francisco J. Vidal-Iglesias, Enrique Herrero*, Antonio Aldaz, Juan M. Feliu, Paramaconi Rodriguez

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)


Irreversible adsorbed bismuth can be used to determine the fraction of (111) domains on a given platinum sample. On Pt(111) electrodes, the surface redox process of adsorbed bismuth takes place at 0.63 V in a well-defined peak. The behavior of this redox process on the Pt(111) vicinal surfaces indicates that the bismuth atoms involved in the redox process are only those deposited on the (111) terrace sites and that the charge under the peak at 0.63 V is directly proportional to the number of sites on (111) ordered domains (terraces). The good linear relationship obtained between the charge for the bismuth redox process and the number of (111) terrace sites on the vicinal surfaces allows construction of a calibration curve. This calibration curve has been used to directly estimate the amount of (111) ordered domain terrace sites on polycrystalline platinum samples with different surface ordered domains. The results agree with what we would expect from our knowledge of these surfaces.

Original languageEnglish
Pages (from-to)5317-5323
Number of pages7
JournalAnalytical Chemistry
Issue number16
Publication statusPublished - 15 Aug 2005

ASJC Scopus subject areas

  • Analytical Chemistry


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