Electrocatalysis of anodic oxygen-transfer reactions: Evolution of ozone

Journal Article · Sat Oct 01 04:00:00 EDT 1994 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2059184· OSTI ID:6992849

Feng, J; Johnson, D C ^[1]; Lowery, S N; Carey, J J ^[2]

---

1. Ames Lab., IA (United States)
2. Environmental Sciences/HAEL, Rochester, NY (United States). Kodak Research Labs.

Current efficiencies are compared for the generation of O[sub 3] simultaneously with O[sub 2] during anodic discharge of H[sub 2]O at pure and iron(III)-doped [beta]-lead dioxide film electrodes in phosphate buffer (pH 7.5, 10 C) containing 2.5 mM KF. Also examined is the effect of applied current density. A current efficiency of 14.6% was obtained for the Fe(III)-doped PbO[sub 2] film electrode deposited on a internally cooled (10 C) tubular titanium substrate at a current density of 200 mA cm[sup [minus]2] as compared to only 6.1% at the undoped PbO[sub 2] electrode under the same conditions. This result is tentatively explained on the basis of a mechanism involving the transfer of oxygen from hydroxyl radicals adsorbed on Pb(IV) sites adjacent to Fe(III) sites to O[sub 2] adsorbed at the Fe(III) sites in the surface of the Fe(III)-doped PbO[sub 2] electrodes.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6992849
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:10; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ALKALI METAL COMPOUNDS
CATALYSTS
CHALCOGENIDES
CHEMISTRY
DOPED MATERIALS
ELECTROCATALYSTS
ELECTROCHEMISTRY
ELECTROLYSIS
ELECTROLYTIC CELLS
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
IRON
LEAD COMPOUNDS
LEAD OXIDES
LYSIS
MATERIALS
METALS
OXIDES
OXYGEN COMPOUNDS
OZONE
POTASSIUM COMPOUNDS
POTASSIUM FLUORIDES
TRANSITION ELEMENTS
WATER