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Title: Oxygen and hydrogen peroxide reduction on the Au(100) surface in alkaline electrolyte. The roles of surface structure and hydroxide adsorption

Abstract

The reduction of oxygen and hydrogen peroxide on the Au(100) surface has been studied using classical electroanalytic methods combined with in situ X-ray scattering techniques in order to relate surface structure to the kinetics. Confirming previous results, the 4e[sup [minus]] reduction pathway for O[sub 2] at low overpotentials gives way to a 2e[sup [minus]] path at higher overpotentials. It was determined that, contrary to previous speculation, the (1 [times] 1) [yields] hex' reconstruction transition is not the dominant mechanism for this change in reaction pathway since the transition in reduction kinetics occurs in a much narrower potential range than the (1 [times] 1) [yields] hex' transition. The time constants for the two transitions differ by approximately 2 orders of magnitude, with the structural transition the slower. We suggest that the change in reaction pathway is related to the potential dependence of the adsorption of hydroxyl anions that catalyze the reduction of peroxide. 15 refs., 2 figs.

Authors:
; ;  [1]
  1. Lawrence Berkeley Lab., CA (United States)
Publication Date:
OSTI Identifier:
5146056
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Journal Article
Journal Name:
Langmuir; (United States)
Additional Journal Information:
Journal Volume: 10:1; Journal ID: ISSN 0743-7463
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; HYDROGEN PEROXIDE; REDUCTION; HYDROXIDES; ADSORPTION; OXYGEN; X RADIATION; SCATTERING; CATALYSIS; ELECTROCHEMISTRY; ELECTRODES; ELECTROLYTES; GOLD; VOLTAMETRY; CHEMICAL REACTIONS; CHEMISTRY; ELECTROMAGNETIC RADIATION; ELEMENTS; HYDROGEN COMPOUNDS; IONIZING RADIATIONS; METALS; NONMETALS; OXYGEN COMPOUNDS; PEROXIDES; RADIATIONS; SORPTION; TRANSITION ELEMENTS; 400400* - Electrochemistry; 400201 - Chemical & Physicochemical Properties

Citation Formats

Markovic, N M, Tidswell, I M, and Ross, P N. Oxygen and hydrogen peroxide reduction on the Au(100) surface in alkaline electrolyte. The roles of surface structure and hydroxide adsorption. United States: N. p., 1994. Web. doi:10.1021/la00013a001.
Markovic, N M, Tidswell, I M, & Ross, P N. Oxygen and hydrogen peroxide reduction on the Au(100) surface in alkaline electrolyte. The roles of surface structure and hydroxide adsorption. United States. https://doi.org/10.1021/la00013a001
Markovic, N M, Tidswell, I M, and Ross, P N. Sat . "Oxygen and hydrogen peroxide reduction on the Au(100) surface in alkaline electrolyte. The roles of surface structure and hydroxide adsorption". United States. https://doi.org/10.1021/la00013a001.
@article{osti_5146056,
title = {Oxygen and hydrogen peroxide reduction on the Au(100) surface in alkaline electrolyte. The roles of surface structure and hydroxide adsorption},
author = {Markovic, N M and Tidswell, I M and Ross, P N},
abstractNote = {The reduction of oxygen and hydrogen peroxide on the Au(100) surface has been studied using classical electroanalytic methods combined with in situ X-ray scattering techniques in order to relate surface structure to the kinetics. Confirming previous results, the 4e[sup [minus]] reduction pathway for O[sub 2] at low overpotentials gives way to a 2e[sup [minus]] path at higher overpotentials. It was determined that, contrary to previous speculation, the (1 [times] 1) [yields] hex' reconstruction transition is not the dominant mechanism for this change in reaction pathway since the transition in reduction kinetics occurs in a much narrower potential range than the (1 [times] 1) [yields] hex' transition. The time constants for the two transitions differ by approximately 2 orders of magnitude, with the structural transition the slower. We suggest that the change in reaction pathway is related to the potential dependence of the adsorption of hydroxyl anions that catalyze the reduction of peroxide. 15 refs., 2 figs.},
doi = {10.1021/la00013a001},
url = {https://www.osti.gov/biblio/5146056}, journal = {Langmuir; (United States)},
issn = {0743-7463},
number = ,
volume = 10:1,
place = {United States},
year = {1994},
month = {1}
}