Potential dependent adhesion forces on bare and underpotential deposition modified electrode surfaces

Joseph M. Serafin, Show Jon Hsieh, Jennifer Monahan, Andrew A. Gewirth

Research output: Contribution to journalArticlepeer-review

Abstract

Adhesion force measurements are used to determine the potential dependence of the force of adhesion between a Si3N4 cantilever and a Au(111) surface modified by the underpotential deposition (upd) of Bi or Cu in acid solution or by oxide formation. The measured work of adhesion is near zero for most of the potential region examined in Bi upd but rises after the formation of a full Bi monolayer. The work of adhesion is high at positive potentials for Cu upd but then decreases as the Cu partial and full monolayers are formed. The work of adhesion is low in the oxide region on Au(111) but rises following the sulfate disordering transition at 1.1 V vs NHE. These results are interpreted in terms of the degree of solvent order on the electrode surface.

Original languageEnglish (US)
Pages (from-to)10027-10033
Number of pages7
JournalJournal of Physical Chemistry B
Volume102
Issue number49
DOIs
StatePublished - Dec 3 1998

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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