Synthesis, characterization and application of electrode materials

Thesis/Dissertation · Fri Jul 07 00:00:00 EDT 1995

DOI:https://doi.org/10.2172/108148· OSTI ID:108148

He, Lin ^[1]

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1. Iowa State Univ., Ames, IA (United States)

It has been known that significant advances in electrochemistry really depend on improvements in the sensitivity, selectivity, convenience, and/or economy of working electrodes, especially through the development of new working electrode materials. The advancement of solid state chemistry and materials science makes it possible to provide the materials which may be required as satisfactory electrode materials. The combination of solid state techniques with electrochemistry expands the applications of solid state materials and leads to the improvement of electrocatalysis. The study of Ru-Ti₄O₇ and Pt-Ti₄O₇ microelectrode arrays as introduced in paper 1 and paper 4, respectively, focuses on their synthesis and characterization. The synthesis is described by high temperature techniques for Ru or Pt microelectrode arrays within a conductive Ti₄O₇ceramic matrix. The characterization is based on the data obtained by x-ray diffractometry, scanning electron microscopy, voltammetry and amperometry. These microelectrode arrays show significant enhancement in current densities in comparison to solid Ru and Pt electrodes. Electrocatalysis at pyrochlore oxide Bi₂Ru₂O_7.3 and Bi₂Ir₂O₇ electrodes are described in paper 2 and paper 3, respectively. Details are reported for the synthesis and characterization of composite Bi₂Ru₂O_7.3 electrodes. Voltammetric data are examined for evidence that oxidation can occur with transfer of oxygen to the oxidation products in the potential region corresponding to anodic discharge of H₂O with simultaneous evolution of O₂. Paper 3 includes electrocatalytic activities of composite Bi₂Ir₂O₇ disk electrodes for the oxidation of I^- and the reduction of IO₃^-.

• Research Organization: Ames Lab., IA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 108148
• Report Number(s): IS-T--1739; ON: DE96000218
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AMPEROMETRY
BISMUTH OXIDES
CATALYTIC EFFECTS
ELECTROCATALYSTS
ELECTRODES
IRIDIUM OXIDES
MICROSTRUCTURE
OXIDATION
PLATINUM
PYROCHLORE
RUTHENIUM OXIDES
SYNTHESIS
TITANIUM OXIDES
X-RAY DIFFRACTION