Comparisons between Scanning Tunneling Microscopy and Outer-Sphere Electron-Transfer Rates at Pt(111) Surfaces Coated with Ordered Iodine Adlayers

Abstract

Rate parameters are reported for the electroreduction of eight CoIII(NH3)5X complexes at ordered Pt(111) surfaces coated with iodine adlayers whose structures are characterized by scanning tunneling microscopy (STM) in order to explore possible correlations between the outer-sphere electron- transfer kinetics and the spatially resolved adlattice properties as revealed by STM. The sixth ligands: acetates, and three cyclic organic carboxylates, were selected so to vary the reactant charge, and hence the magnitude of electrostatic double-layer effects, and to examine the effect of potential organic mediators. The ordered Pt(111) surfaces were prepared by flame annealing, followed by cooling in a stream of nitrogen over iodine crystals.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 1991
Accession Number
ADA237507

Entities

People

  • B. C. Schardt
  • Michael J. Weaver
  • S. C. Chang
  • S. L. Yau

Organizations

  • Purdue University

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boundaries
  • Cells
  • Chemistry
  • Coefficients
  • Crystal Structure
  • Electrochemical Kinetics
  • Electrochemical Reactions
  • Electrochemistry
  • Electrodes
  • Electrolytes
  • Electron Transfer
  • Microscopy
  • Military Research
  • Physical Chemistry
  • Scanning
  • Universities
  • Valence Bond Theory

Fields of Study

  • Physics

Readers

  • Electrochemical Surface Science
  • Organic Chemistry

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene