Anodic oxygen-transfer electrocatalysis at pure and modified lead dioxide electrodes in acidic media

Technical Report · Mon Jun 01 04:00:00 EDT 1987

OSTI ID:6427469

Yeo, In-Hyeong

Pure ..beta..-lead dioxide and lead dioxide doped heavily with other metal oxides were prepared by electrochemical deposition on a gold, rotated disc electrode (RDE) in 1.0 M HC1O/sub 4/. These electrodes were compared for their electrocatalytic support of anodic reactions accompanied by transfer of oxygen from the aqueous solvent to the reaction product. The heterogeneous rate constants of several inorganic and organic reactions were determined with emphasis on the reaction Mn(II) + 4H/sub 2/O ..-->.. MnO/sub 4/ + 8H/sup +/ + 5e. The electrocatalytic effects of numerous dopants were determined and bismuth oxide was found to cause the greatest increase in rates of anodic oxygen-transfer reactions. Physical properties of the bismuth mixed lead oxide electrodes were studied. The greatest rate of oxidation of Mn(II), smallest O/sub 2/ evolution overpotential, and highest preferred orientation level occurred for mixed oxides electrodeposited from solutions with Bi(III)/Pb(II) ratio of 0.7/1.0.

• Research Organization: Ames Lab., IA (USA)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6427469
• Report Number(s): IS-T-1303; ON: DE87010928
• Country of Publication: United States
• Language: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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BISMUTH COMPOUNDS
BISMUTH OXIDES
CATALYSTS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
DEPOSITION
DOPED MATERIALS
ELECTROCATALYSTS
ELECTROCHEMISTRY
ELECTRODEPOSITION
ELECTRODES
ELECTROLYSIS
ELEMENTS
IONS
KINETICS
LEAD COMPOUNDS
LEAD OXIDES
LYSIS
MANGANESE IONS
MATERIALS
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
REACTION KINETICS
SURFACE COATING