Co-Ni-Cu ternary spinel oxide-coated electrodes for oxygen evolution in alkaline solution

Ten Chin Wen, Hong Ming Kang

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

A systematic investigation of Co-Ni-Cu ternary oxide-coated electrodes fabricated by thermal decomposition is performed in alkaline solution by a mixture design approach. Cyclic voltammograms have noticeable differences with the addition of Ni/Cu species into Co3O4 oxide, influencing the corresponding activities of oxygen evolution. The textural results of these oxide electrodes examined by XRD, SEM and XPS demonstrate a spinel structure for all prepared electrodes and a porous morphology with adding Ni/Cu species in the Co3O4 matrix. On the other hand, using mixture experimental design, empirical models for q* and i fitted and plotted as contour diagrams, facilitate straightforward examinations of the dependence of q* and i on the composition of both binary (Co-Ni, Co-Cu) and ternary (Co-Ni-Cu) oxide systems. The results from contour plots clearly reveal that ternary oxides prepared from the precursors containing 50-63% Co, 30-40% Ni, 5-15% Cu by molar proportion possess the highest electrochemical activity for oxygen evolution.

Original languageEnglish
Pages (from-to)1729-1745
Number of pages17
JournalElectrochimica Acta
Volume43
Issue number12-13
DOIs
Publication statusPublished - 1998 May 5

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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