Electrocatalysis of anodic oxygen-transfer reactions; Chloride-doped lead dioxide electrodes

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Journal of the Electrochemical Society; (USA)

DOI:https://doi.org/10.1149/1.2096534· OSTI ID:7037913

Hsiao, Y L; Johnson, D C ^[1]

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

The electrocatalytic activities were compared for pure and chloride-doped beta-PbO{sub 2} films on gold and platinum substrates. Rate constants were increased significantly for oxidations of Mn{sup 2 +}, toluene, benzyl alcohol, dimethylsulfoxide and benzaldenhyde in acidic media by the incorporation of Cl{sup {minus}} into the oxide films. These reactions are concluded to occur by the electrocatalytic transfer of oxygen fro H{sub 2}O to the reaction products. Results of x-ray diffraction studies indicate the Cl{sup {minus}} - doped PbO{sub 2} continues to have the slightly distorted rutile structure of pure beta-PbO{sub 2}. The observed electrocatalytic phenomena is concluded to be the beneficial consequence of surface defects generated when Cl {sup {minus}} serves for charge compensation within the surface matrix and, thereby, increases surface sites capable of adsorbing hydroxyl radicals which are transferred in the electrocatalytic O-transfer reactions.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 7037913
• Journal Information: Journal of the Electrochemical Society; (USA), Journal Name: Journal of the Electrochemical Society; (USA) Vol. 136:12; ISSN 0013-4651; ISSN JESOA
• Country of Publication: United States
• Language: English

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ALKYLATED AROMATICS
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AROMATICS
CATALYSTS
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CHEMICAL REACTION KINETICS
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
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ELECTROCATALYSTS
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HALOGEN COMPOUNDS
HYDROCARBONS
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LEAD COMPOUNDS
LEAD OXIDES
LEAD-ACID BATTERIES
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TOLUENE
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X-RAY DIFFRACTION