Journal of Applied Electrochemistry

, Volume 1, Issue 2, pp 113–126 | Cite as

Investigations in platinum metal group electrochemistry: I some iridium (IV) — iridium (III) systems

  • E. Jackson
  • D. A. Pantony


The ‘Norbide’, boron carbide, electrode has been shown to be exceptionally good in terms of its chemical inertness, rapid response and high hydrogen overvoltage. It has been applied especially in potentiometric and polarographic studies of the Ir(IV)-Ir(III) system in various media. By its means, supported by evidence from use of other cathodes, certain previous work has been confirmed and standard or formal redox potentials of the following systems have been determined: Ir(IV)-Ir(III)-ClO 4 (M HClO4, 1·27 V; Ir (IV)-Ir(III)-SO 4 2− (0·18M H2SO4), 1·08 V; Ir(IV)-Ir(III)-PO 4 3− (0·3M H3PO4), provisionally 0·99 V; IrCl 6 2− -IrCl 6 3− (0·1M NaClO4 or NaCl), 0·899 V; IrBr 6 2− -IrBr 6 2− (0·1M NaClO4or NaBr), 0·838 V. The potentials fall in the expected sequence. The possibility of analytical application of the ‘Norbide’ and rotating platinum electrode has also been examined.


Carbide Boron H3PO4 HClO4 Iridium 
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Copyright information

© Chapman and Hall Ltd 1971

Authors and Affiliations

  • E. Jackson
    • 1
    • 2
  • D. A. Pantony
    • 1
  1. 1.Department of MetallurgyImperial College of Science and TechnologyLondonUK
  2. 2.Department of MetallurgySheffield PolytechnicSheffieldUK

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