A novel amperometric transducer electrode with iridium-niobium binary alloys

Toru Matsumoto, Naoaki Sata, Yoko Mitarai

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We have discovered that an Ir-23Nb binary alloy more effectively oxidizes hydrogen peroxide than Ir, Ir-13Nb, Ir17Nb, Ir-30Nb, Ir-43Nb, Ir-62Nb, or Nb. The oxidation capability was determined via cyclic voltammogram measurements of pH-buffer and hydrogen peroxide. We ascertained that applying a 0.7 V potential produces hydrogen peroxide currents of 9.2 μA/mm2 Ir-23Nb, 5.3 μA/mm2 Ir, 5.1 μA/mm2 Ir-17Nb, 3.7 μA/mm2 Ir-13Nb, 2.0 μA/mm2 Ir-30Nb, 1.5 μA/mm2 Ir-43Nb, 0.6 μA/mm2 Ir-62Nb, and 0.13 μA/mm2 Nb. These results indicate that the effective oxidation of Ir-23Nb for hydrogen peroxide might be due to its fcc+L12 two-phase structure and that Ir-23Nb can be used as an amperometric transducer material.

Original languageEnglish
Pages (from-to)2263-2266
Number of pages4
Issue number20
Publication statusPublished - 2009 Oct 1
Externally publishedYes


  • Alloys
  • Amperometric transducer
  • Iridium
  • Niobium

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry


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