In situ monitoring of peroxodisulfate anion production

Dalrymple, Ian; Hitchman, Michael L.; Price, D. H.; Millington, J. P.

doi:10.1002/elan.1140090208

Cited by 3 publications

(6 citation statements)

References 2 publications

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“…Other electrode materials.-The electroreduction of peroxodisulfate has also been investigated using other electrode materials: leadand thallium-adsorbed silver (Ag), 79 Cd-adsorbed platinized Pt, 70 riboflavin/graphene quantum dots-modified glassy carbon, 80 ruthenium oxide/thionine-and ruthenium oxide/celestine blue-modified glassy carbon, 81 mercury, [82][83][84] Cd, [85][86][87] bismuth, 86 Prussian blue, 88 and BDD. 89 However, none of these materials exhibit diffusion-controlled currents.…”

Section: Electrochemical Behavior Of Peroxodisulfatementioning

confidence: 99%

Review—Electroreduction of Peroxodisulfate: A Review of a Complicated Reaction

Shafiee

Aarons

Hamzah

2018

J. Electrochem. Soc.

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The electroreduction of peroxodisulfate has been studied on various electrode materials for decades. However, the reduction of peroxodisulfate is not fully understood to date. Many research groups have searched for an electrode material that exhibits a diffusion-controlled response in the electroreduction of peroxodisulfate. However, the voltammetric responses obtained on most electrode materials have shown a kinetically-controlled reaction. Reaction mechanisms of peroxodisulfate reduction have also been proposed by a few groups. This review paper focuses on the electrochemical responses for the reduction of peroxodisulfate obtained on platinum, gold, platinized platinum, and bismuth-adsorbed platinum electrodes. This paper will not review the polarograms obtained on mercury drop electrodes for the reduction of peroxodisulfate anions because we believe that the results do not contribute to the understanding of the electrochemical reactions. We propose a simplified version of the reaction mechanisms. This paper also reviews the kinetic models proposed by several groups which could assist the readers to apprehend the kinetic behaviors of peroxodisulfate reduction. This paper discusses several issues related to peroxodisulfate from the natural decomposition of peroxodisulfate to the reaction mechanisms of peroxodisulfate reduction.

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Section: Electrochemical Behavior Of Peroxodisulfatementioning

confidence: 99%

Review—Electroreduction of Peroxodisulfate: A Review of a Complicated Reaction

Shafiee

Aarons

Hamzah

2018

J. Electrochem. Soc.

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“…E F is taken as 0 eV , Note that there are different values of E PDS 0 in the literature, ranging from 1.5 to 2.01 V SHE . This divergence does not affect the model results for reasons that will become clear soon.…”

Section: Model Developmentmentioning

confidence: 99%

“…24 E PDS 0 is taken as 2 V SHE . 11,12 Note that there are different values of E PDS 0 in the literature, ranging from 1.5 to…”

Section: ■ Model Developmentmentioning

confidence: 99%

“…In other words, the excess free charge on the electrode surface can be deduced, in principle, from the polarization curve of electrochemical reactions. , In this vein, the peroxodisulfate (PDS, S 2 O 8 2– ) reduction, S 2 O 8 2– + 2e – → 2(SO 4 2– ) with a standard equilibrium potential of 2.01 V SHE , , has been long-employed as a model reaction for this purpose on different metals, including, but not limited to, mercury, mercury-like metals (Cd, , Bi, , etc. ), and transition metals (Au ,, and Pt).…”

Section: Introductionmentioning

confidence: 99%

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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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“…Another approach is a voltammetric method which uses an electrode modified with a Prussian Blue film [5]. In [6] the proposed peroxodisulphate measuring method used as amalgamated copper rotating disk electrode. All these constructions are typical laboratory set-ups.…”

Section: List Of Symbolsmentioning

confidence: 99%

On-Line Measuring Method for the Concentration of Peroxodisulphate

Giebler

Kirmse

2005

J Appl Electrochem

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Although the analytical determination of peroxodisulphate is state of the art, there is no well-established on-line measuring method for this substance. This paper presents an on-line monitoring device for peroxodisulphate concentration that uses a coulometric measuring method. The method is based on the redox potential control in a miniaturised electrochemical reactor. This paper presents the design of the measuring cell and describes the integration of this cell in an on-line measuring device which can be applied in a process environment. Experimental results illustrate its dynamic characteristics and accuracy.

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In situ monitoring of peroxodisulfate anion production

Cited by 3 publications

References 2 publications

Review—Electroreduction of Peroxodisulfate: A Review of a Complicated Reaction

Review—Electroreduction of Peroxodisulfate: A Review of a Complicated Reaction

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

On-Line Measuring Method for the Concentration of Peroxodisulphate

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