Electrocatalysis of anodic oxygen-transfer reactions; Acetate-doped lead dioxide electrodes in sulfuric acid media

Journal Article · Sat Feb 01 04:00:00 EST 1992 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2069226· OSTI ID:5384137

Hsiao, Y L; Vitt, J E; Johnson, D C ^[1]

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1. Ames Lab., Dept. of Chemistry, Iowa State Univ., Ames, IA (US)

This paper reports that oxidations of dimethyl sulfoxide, toluene, and p-xylene at pure PbO{sub 2}-film electrodes were determined to be under extreme kinetic control with values of the apparent heterogeneous rate constant (k{sub app} {much lt} 1 {times} 10{sup {minus}1}. However, a significant increase in K{sub app} was observed at acetate-doped PbO{sub 2}-film electrodes (OAc-PbO{sub 2}) in 1M H{sub 2}SO{sub 4}. X-ray diffraction data indicated the OAc-PbO{sub 2} films retained the slightly distorted rutile structure of the {beta}-form of the pure PbO{sub 2}. Catalysis of the anodic discharge of H{sub 2}O to produce adsorbed hydroxyl radicals (OH{sub ads}) is concluded to account for the enhanced catalytic activity of the OAc-PbO{sub 2} films for the anodic oxygen transfer reactions in H{sub 2}SO{sub 4}.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5384137
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 139:2; ISSN 0013-4651; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101 -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
400400* -- Electrochemistry
ALKYLATED AROMATICS
ANODES
AROMATICS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
COHERENT SCATTERING
DIFFRACTION
DMSO
DOPED MATERIALS
ELECTROCATALYSTS
ELECTROCHEMISTRY
ELECTRODES
ENERGY TRANSFER
FILMS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXYL RADICALS
INORGANIC ACIDS
LEAD COMPOUNDS
LEAD OXIDES
MATERIALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
RADICALS
REDOX REACTIONS
SCATTERING
SULFOXIDES
SULFURIC ACID
THIN FILMS
TOLUENE
X-RAY DIFFRACTION
XYLENES