Abstract

The adsorbate-induced surface stress was studied for the system CO/Pt{111}-textured thin films in CO-saturated 0.1 M HClO4 and characterized through the techniques of cyclic voltammetry and chronoamperometry. A compressive stress of -1.1 N/m was measured for a saturation coverage. It is shown that CO blocks the electrode both electrochemically (charge transfer) and physically (surface stress changes). Additionally, it is demonstrated with surface stress measurements that CO does not desorb with the removal of CO from the electrolyte. The adsorption kinetics of CO are shown to be slow, with a saturation coverage taking more than 65 s to acquire. When driven electrochemically, CO oxidation kinetics are fast, occurring in much less than 1 s.

Original languageEnglish (US)
Pages (from-to)1060-1063
Number of pages4
JournalJournal of Physical Chemistry C
Volume112
Issue number4
DOIs
StatePublished - Jan 31 2008

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electrochemical oxidation
Electrochemical oxidation
Carbon Monoxide
Adsorption
Chronoamperometry
oxidation
Kinetics
adsorption
Stress measurement
Surface measurement
Adsorbates
Compressive stress
Cyclic voltammetry
saturation
Charge transfer
stress measurement
Electrolytes
kinetics
Thin films
Oxidation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Surface stress observations during the adsorption and electrochemical oxidation of CO on Pt{111}. / Mickelson, L.; Heaton, Th; Friesen, Cody.

In: Journal of Physical Chemistry C, Vol. 112, No. 4, 31.01.2008, p. 1060-1063.

Research output: Contribution to journalArticle

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AB - The adsorbate-induced surface stress was studied for the system CO/Pt{111}-textured thin films in CO-saturated 0.1 M HClO4 and characterized through the techniques of cyclic voltammetry and chronoamperometry. A compressive stress of -1.1 N/m was measured for a saturation coverage. It is shown that CO blocks the electrode both electrochemically (charge transfer) and physically (surface stress changes). Additionally, it is demonstrated with surface stress measurements that CO does not desorb with the removal of CO from the electrolyte. The adsorption kinetics of CO are shown to be slow, with a saturation coverage taking more than 65 s to acquire. When driven electrochemically, CO oxidation kinetics are fast, occurring in much less than 1 s.

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