POTENTIAL OF A PLATINUM ELECTRODE AT LOW PARTIAL PRESSURES OF HYDROGEN OR OXYGEN.

Abstract

The open-circuit potential on birght platinum in 1M H2SO4 was studied as a function of oxygen or hydrogen partial pressure from .10 to 10 to the minus 7th power atm. The very low rates of H2 or O2 flow which were required were produced by a special gas generator. Potentials predicted by the Nernst equation for the H+/H2 couple were not observed below .0010 atm H2 partial pressure. A Nernst relation with a slope of 0.06 v per decade of O2 partial pressure was found. The O2 leak into the closed system used was found to be about 10 to the minus 7th power atm. Based on the assumption that dissolved O2 decreases the effective H2 partial pressure at the electrode surface, an equation was developed for obtaining the effective H2 partial pressure. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 15, 1965
Accession Number
AD0624024

Entities

People

  • S. Schuldiner
  • T. B. Warner

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Electrodes
  • Elements
  • Equations
  • Generators
  • Hydrogen
  • Partial Pressure
  • Platinum
  • Vapor Pressure

Readers

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  • Plasma Physics.
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