Die Bestimmung des Bedeckungsgrades von S2O82− und Jodat an Platin

Müller, Lothar; Wetzel, R.; Otto, H.

doi:10.1016/s0022-0728(70)80018-3

Cited by 23 publications

(15 citation statements)

References 4 publications

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“…Data reported in this paper in combination with the results published earlier [21,22,24] demonstrate that at various pH the reaction takes place in one and the same potential domain (RHE scale). This fact favors an assumption about the important role of the reactant adsorption step.…”

Section: Discussionsupporting

confidence: 83%

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Peroxodisulphate reduction as a novel probe for the study of platinum single crystal/solution interphases

Climent

Maciá

Herrero

et al. 2008

Journal of Electroanalytical Chemistry

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Section: Discussionsupporting

confidence: 83%

“…Successive experiments on Pt in alkaline solutions [21,22] discovered complications of reaction kinetics by adsorbed intermediate species formed in the course of dissociative PS adsorption with O-O bond rupture. This hypothesis was applied to explain the data reported in Refs.…”

Section: Introductionmentioning

confidence: 99%

Peroxodisulphate reduction as a novel probe for the study of platinum single crystal/solution interphases

Climent

Maciá

Herrero

et al. 2008

Journal of Electroanalytical Chemistry

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“…On catalytically active materials, the PA reduction mechanism can be more complicated [4][5][6][7][8][9]. Along with successive gain of two electrons, as on mercury and its analogues, the catalytically active surfaces favor the O-O bond breaking in PA followed by the capture of electrons by the formed (SO 4 ) ads species.…”

Section: Introductionmentioning

confidence: 99%

Effect of cadmium and lead adatoms on the reduction kinetics of peroxodisulfate anions at platinized platinum in acid solutions

Nikiforova

Петрий

2005

Russ J Electrochem

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The reduction of peroxodisulfate anions on a rotating Pt/Pt disk electrode in solutions of sulfuric and perchloric acids with or without cadmium and lead salts is studied. At E r > 0.2 V (RHE) the reduction rate in HClO 4 exceeds that in H 2 SO 4 , but at E r < 0.2 V, the process in HClO 4 is strongly inhibited upon approaching E r = 0. Lead adatoms catalyze the process, while cadmium adatoms inhibit it in H 2 SO 4 and accelerate it at E r < 0.2 V in HClO 4 . The results are interpreted by taking account of the specific adsorption of sulfuric-acid anions and their co-adsorption with cadmium cations, as well as the adsorption of peroxodisulfate anions on the Pt surface modified by lead and cadmium ions in perchlorate solutions.

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“…The PDS reduction begins with a dissociative chemisorption step. ,,,, The adsorptive dissociation S 2 O 8 2– forms two adsorbed SO 4 – , each blocking up to three surface sites denoted as (SO 4 – ) ad , namely where * A denotes adsorption sites for (SO 4 – ) ad , and k f and k b denote the rate constants of the forward and backward reactions of the first dissociative chemisorption step, respectively. In this model, we distinguish adsorption sites for (SO 4 – ) ad and those for adsorbed hydroxyl (OH ad ), and experiments have proved the absence of site-blocking effect of OH ad on PDS reduction at Pt(111) …”

Section: Model Developmentmentioning

confidence: 99%

“…Equation is followed by two one-electron reduction steps, ,,,, occurring at the IHP2 where k O and k R are the oxidation and reduction reaction rate constants, respectively.…”

Section: Model Developmentmentioning

confidence: 99%

Understanding Surface Charge Effects in Electrocatalysis. Part I: Peroxodisulfate Reduction at Pt(111)

Zhang

Huang

2020

J. Phys. Chem. C

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Electrocatalytic reactions invariably occur in the electrochemical double layer (EDL) whose properties are markedly dictated by the excess free charge on the electrode surface. The peroxodisulfate (PDS) reduction has long served as a model reaction to understand the surface charge effect on electrocatalytic reactions. Herein, we develop a mechanistic model for the PDS reduction at Pt(111) based on a mechanism consisting of a dissociative chemisorption step and two one-electron reduction steps. The electron-transfer step is described using the Marcus−Hush−Chidsey theory considering the double-layer structure and the metal electronic structure. The model reveals that considering the metal electronic structure in the kinetic rate expression is essential to explain the experimental observation that the reduction current first increases as the electrode potential decreases and is then suppressed when the electrode potential is lower than the potential of zero charge (pzc). In addition, a quantitative match with experimental data requires electrostatic interactions that are much stronger than that described by the mean-field Poisson−Boltzmann equation. Furthermore, hydroxyl adsorption forms surface dipoles at the metal surface and changes the surface-charging behavior, leading to a second pzc in high potential range that coincides with the onset potential of PDS reduction.

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Die Bestimmung des Bedeckungsgrades von S2O82− und Jodat an Platin

Cited by 23 publications

References 4 publications

Peroxodisulphate reduction as a novel probe for the study of platinum single crystal/solution interphases

Peroxodisulphate reduction as a novel probe for the study of platinum single crystal/solution interphases

Effect of cadmium and lead adatoms on the reduction kinetics of peroxodisulfate anions at platinized platinum in acid solutions

Understanding Surface Charge Effects in Electrocatalysis. Part I: Peroxodisulfate Reduction at Pt(111)

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