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Title Electrocatalysis of anodic, oxygen-transfer reactions at noble metal electrodes
Creator/Author Vitt, J.E.
Publication Date1992 Jun 09
OSTI IdentifierOSTI ID: 10155835; Legacy ID: DE92016308
Report Number(s)IS-T--1569
DOE Contract NumberW-7405-ENG-82
Other Number(s)Other: ON: DE92016308
Resource TypeThesis/Dissertation
Specific TypeTechnical Report
Resource RelationOther Information: TH: Thesis (Ph.D.); PBD: 9 Jun 1992
Research OrgAmes Lab., IA (United States)
Sponsoring OrgUSDOE, Washington, DC (United States)
Subject37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; HYDROXYL RADICALS; TRANSFER REACTIONS; LUMINOL; CHEMILUMINESCENCE; WATER; OXIDATION; VOLTAMETRY; ELECTRON TRANSFER; ELECTRODES; GOLD; PLATINUM METALS; CARBON
Description/Abstract Voltammetry at rotated disk and rotated ring-disk electrodes was applied to the study of several aspects of anodic, oxygen-transfer reactions at noble electrodes. Anodic reactions which involve the transfer of oxygen from H{sub 2}O to the oxidation products generally exhibit a voltammetric response characterized by severe kinetic limitations. Mechanistic studies were performed at noble electrodes in order to contrive strategies for improving the kinetics of these reactions. Competitive adsorption studies were used to devise an adsorption hierarchy for Au rotated disk electrodes. It was concluded that adsorption was a prerequisite for oxidations involving the transfer of oxygen present on the electrodes surface as adsorbed hydroxyl radicals. The electrogenerated chemiluminescence (ECL) of luminol was studied at Au, Pt, Pd, glassy carbon, PbO{sub 2}, and Bi-doped PbO{sub 2} electrodes. The ECL intensity was determined to be inversely related to electrochemical activity for the oxidation of luminol. It was concluded that the oxygen-transfer oxidation of luminol to 3-aminophthalate ( n = 4 eq mol{sup {minus}1}) corresponded to the dark reaction, whereas the electron-transfer oxidation of luminol with n = 1 eq mol{sup {minus}1} initiated the chemiluminescent reaction in solution.
Country of PublicationUnited States
LanguageEnglish
FormatSize: 179 p.
AvailabilityOSTI; NTIS; GPO Dep.
System Entry Date2005 Jul 06

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