Coulometric Study of Acetate Adsorption at a Polycrystalline Platinum Electrode

Abstract

The adsorption of acetic acid from a perchloric acid electrolyte blocks the adsorption of oxygen on a polycrystalline platinum electrode. Using a staircase of potential pulses, it is possible to follow the adsorption process from the moment of surface activation and under well-defined conditions of mass transport. Under those conditions, the initial rate of blockage adheres well to that anticipated by diffusion control with each mole of acid preventing the adsorption of four equivalents of charge, validating coulombic measurement as a quantitative tool for determining the rates of adsorption, desorption, and equilibrium surface coverage.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2011
Accession Number
ADA550005

Entities

People

  • Sol Gilman

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acetic Acid
  • Acids
  • Adsorption
  • Crystal Structure
  • Desorption
  • Diffusion
  • Electrodes
  • Electrolytes
  • Equations
  • Fluoropolymers
  • Hydrogen Electrodes
  • Measurement
  • Military Research
  • Perchloric Acid
  • Platinum
  • Polycrystals
  • Surface Properties

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Joint Military Operations and Doctrine.