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  Autocatalysis by the intermediate surface hydroxide formed during H2O2 reduction on Ag(111) electrodes

Danckwerts, M., Horswell, S. L., Pettinger, B., Savinova, E. R., Weil, K. G., & Doblhofer, K. (2004). Autocatalysis by the intermediate surface hydroxide formed during H2O2 reduction on Ag(111) electrodes. In Birss, V. I., Burke, L. D., Hillman, A. R., et al. (Eds.), Surface Oxide Films (pp. 151-159). Pennington, NJ 08534-2839, USA: The Electrochemical Society Inc.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-0DF3-A Version Permalink: https://hdl.handle.net/21.11116/0000-0006-3D43-B
Genre: Conference Paper

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 Creators:
Danckwerts, Matthias1, Author           
Horswell, Sarah L.1, Author           
Pettinger, Bruno1, Author           
Savinova, Elena R.1, Author           
Weil, Konrad G.1, Author           
Doblhofer, Karl1, Author           
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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Free keywords: Single-crystal electrode; Hyrogen-peroxide; Oxygen reduction; Ag electrodes; Silver; Mechanism, Interface; Oxidation; Behavior; Platinum; Electrocatalysis; Ag(111); surface reaction; hydrogen peroxide; adsorption; activation; second harmonic generation
 Abstract: The cathodic hydrogen peroxide, H2O2, reduction in HClO4 proceeds by two parallel mechanisms, the “normal” H2O2 reduction, and a remarkable autocatalytic reaction path. Chemisorbed hydroxyl groups OHad, formed as an intermediate on the silver electrode, are considered to constitute the autocatalytically active species. In order to obtain a clearer conception of the species OHad, the state of Ag(111) electrodes in inert electrolytes of varying pH is analysed with electrochemical and surface science tech-niques. Experiments with Second Harmonic Generation yield particularly valuable results. The surface studies, along with numerical simulations of the adsorption dynamics, indicate that the species OHad is identical with the discharged surface hydroxyl species formed as a relatively stable intermediate in the anodic oxidation of OH- to surface-Ag2O.

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Language(s): eng - English
 Dates: 2004
 Publication Status: Issued
 Pages: 360 pages
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 192045
URI: https://iopscience.iop.org/journal/2576-1579/page/PV2003
 Degree: -

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Title: International Symposium on Surface Oxide Films held at the 204th Electrochemical-Society Meeting
Place of Event: Orlando, FL, USA
Start-/End Date: 2003-10-12 - 2003-10-17

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Title: Surface Oxide Films
Source Genre: Proceedings
 Creator(s):
Birss, Editor
I., V., Editor
Burke, Editor
D., L., Editor
Hillman, Editor
R., A., Editor
Lillard, Editor
S., R., Editor
Affiliations:
-
Publ. Info: Pennington, NJ 08534-2839, USA : The Electrochemical Society Inc.
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 151 - 159 Identifier: ISBN: 1-56677-410-1

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Title: Proceedings Volumes
Source Genre: Series
 Creator(s):
The Electrochemical Society Inc., Editor              
Affiliations:
-
Publ. Info: -
Pages: - Volume / Issue: 2003-25 Sequence Number: - Start / End Page: - Identifier: -