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          Document History for Document ID 362557

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Document Version Version Comment Date Status
362557.1 [No comment] 13.05.2009 19:36 Released
362557.0 [No comment] 10.02.2009 09:48 Released

ID: 362557.1, Fritz-Haber-Institut / Physical Chemistry
Autocatalysis by the intermediate surface hydroxide formed during hydrogen peroxide reduction on silver electrodes
Authors:Doblhofer, Karl; Flätgen, Georg; Horswell, Sarah L.; Pettinger, Bruno; Wasle, Sabine; Weil, Konrad G.
Language:English
Date of Publication (YYYY-MM-DD):2009-06-01
Title of Journal:Surface Science
Journal Abbrev.:Surf. Sci.
Volume:603
Issue / Number:10-12
Start Page:1900
End Page:1903
Title of Issue:Special Issue dedicated to Prof. Dr. Dr. h.c. mult. Gerhard Ertl, Nobel-Laureate in Chemistry 2007
Full name of Issue-Editor(s):Wandelt, Klaus; Campbell, Charles W.
Copyright:© 2009 Elsevier B.V. All rights reserved
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Recent electrochemical studies of the cathodic reduction of hydrogen peroxide (H2O2) on silver electrodes in acidic electrolyte (HClO4) revealed a novel autocatalytic reaction path. Adsorbed hydroxyl groups, OHad, were proposed to act as the catalyst. To gather further clarity about this mechanism, in particular about the presence and nature of the postulated adsorbate formed as an intermediate, constitute the autocatalytically active species. In order to obtain a clearer conception of the species OHad, in the present work surface science experiments on Ag(111) electrodes are evaluated. It is concluded that the species OHad is identical with the surfaceAgOH formed in alkaline solution as a relatively stable intermediate in the anodic oxidation of OH– to surface-Ag2O.
Free Keywords:Models of non-equilibrium phenomena; Electrochemical methods; Surface chemical reactions; Hydrogen peroxide; Silver electrode
External Publication Status:published
Document Type:Article
Communicated by:Martin Wolf
Affiliations:Fritz-Haber-Institut/Physical Chemistry
External Affiliations:Flatgen G, Münsterstr. 113, D-40476 Düsseldorf, Germany; Horswell SL, Univ Birmingham, Sch Chem, Birmingham B15 2TT, W Midlands, UK
Identifiers:URL:http://www.sciencedirect.com/science?_ob=ArticleUR...
DOI:10.1016/j.susc.2008.11.047