Electrocatalysis on silver and silver alloys for dichloromethane and trichloromethane dehalogenation

Rondinini, Sandra; Vertova, Alberto

doi:10.1016/j.electacta.2003.12.061

Cited by 97 publications

(72 citation statements)

References 19 publications

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“…The great interest for this process is due to the important roles it plays in synthetic [2,4] and environmental applications, [5][6][7] especially the abatement of volatile polychlorinated organic compounds, but also to mechanistic aspects.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalysis and electron transfer mechanisms in the reduction of organic halides at Ag

et al. 2009

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The reductive cleavage of a series of organic halides, including both aromatic and aliphatic compounds, has been investigated in acetonitrile at glassy carbon and silver electrodes. Ag exhibits extraordinary electrocatalytic activities for the reduction of most of the investigated halides. During the reductive cleavage of a carbon-halogen bond, electron transfer (ET) and bond breaking may occur either in a single step or in two distinct steps. The compounds examined in this study are representative of both dissociative electron transfer (DET) mechanisms. In general a link between the DET mechanism and electrocatalysis at Ag is observed for the whole set of data. There is no catalysis at all when the ET involves a substituent that gives a stable radical anion. Furthermore, there is no catalysis for all aromatic chlorides. Instead, a remarkable electrocatalysis is observed for all compounds undergoing a concerted DET mechanism, regardless of the nature of the halogen atom.

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Section: Introductionmentioning

confidence: 99%

Electrocatalysis and electron transfer mechanisms in the reduction of organic halides at Ag

et al. 2009

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“…Among all those new catalytic electrodes, silver electrodes [19][20][21][22] appear mainly convenient for activating the catalytic scission of carbonhalogen bonds (Scheme 1.4). Within the same period, palladium electrodes also showed powerful capabilities to operate the catalytic reduction of alkyl and aromatic organic halides [23].…”

Section: Intrinsically Catalytic Electrodesmentioning

confidence: 99%

“…Homo-coupling reactions in high yield at surfaces strongly activated by chemical or electro-chemical grafting were developed. The use of transition metals such as Ag [20][21][22], Pd [23], Cu [24] as well as Pt [25] were promoted. The aim of this extended survey, although not complete, is to underline some possibilities both in solution, at the interface, and inside the conductor bulk (carbons, metals) that may not always be chemically modified and may contribute to accelerate the electron transfer rate.…”

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confidence: 99%

How to Modify Solid Electrodes for Generating New Interfacial Processes — Another Approach in Electro-Chemical Catalysis

Simonet¹

2017

Catalytic Science Series

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The word "catalytic" comes from Ancient Greek and can be translated as "a breaking down". The word "catalysis" was introduced in the first half of the 19 th century by the Swedish Scientist J. J. Berzelius who applied it to the observation that in chemical reactions, the normal barriers can be removed by the help of external reagents. Nowadays, the term "catalysis" remains attached to the petroleum refining science introduced more than half a century ago. It mainly refers to the removal of sulfur and nitrogen from naphthas in order to produce fuel (gasoline, diesels, etc.). Refining reactions are conducted in the presence of catalysts often constituting of metals and metal oxides (mixed metal oxides, MMOs) in order to decrease cracking temperatures and improve selectivity of chemical reactions [1,2].In electro-chemistry, the term catalysis is quite recent and remains mainly linked to an easiness in interfacial reactions. Therefore, for It may then appear that most of the 19 chapters that follow this introduction possess an undeniable character of novelty both in the domain of new catalytic reactions, the chemical and electrochemical modifications of conducting solid surfaces, especially in the field of carbons, precious metals and copper. It is obvious however that some parts of the book could present a superficial or unbelievable aspect since both the ideas and the significant results do not go sufficiently into enough details about the scientific aspect and the possible applications. It could actually be the responsibility of the reader to freely reproduce some results and use some ideas (good or judged as incomplete) presented in this research.Among the well-established electro-catalytic processes, redox catalysis remains an intriguing and powerful method that specifically belongs to organic electro-chemistry. This technique 3 corresponds to the innovative and important progress in the field of indirect electrolyses. The first evidence of the indirect reduction of an alkyl-halide RX by the anion radical of naphthalene was reported by Fry [3] while the wide scope of redox catalysis (kinetics and synthetic applications) was unambiguously disclosed by Lund and co-workers [4-6, 8, 16] in the course of 1970s by using polarographic currents of Koutecky's theory. Meanwhile, other authors were also interested in this form of catalysis [7,9,10]. Based on this indirect process, kinetic and thermodynamic results were successfully achieved by by using the voltammetric technique. Thus, for the first time, thermodynamic data and standard potential values concerning reduction of R • radicals (issued from the cleavage of alkyl and aryl halides, (RX's and ArX's)) were appreciated in this way. Thus, RIs (alkyl iodides) in general and certain RBrs (alkyl bromides) may lead to one-electron scissions at cathodes. Therefore, selective one-electron processes and subsequently produced free radicals were considered to be of high interest also for synthesis and they prompted many authors in the course of last three decades to revi...

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“…For this reason, the electrochemical reductive cleavage of carbon-halogen bonds in organic compounds, with the particular focus on volatile organic halides, has been mainly studied and developed in the last decades [10][11][12][13] being the subject of numerous studies in aqueous [14][15][16], non aqueous [17][18][19] and mixed solvents [13,20]. The great interest for this process is due to its important role in some environmental applications, such as the abatement of volatile polychlorinated organic compounds, a group of pollutants having hazardous effects on living beings and out of the scope of most EAOPs.…”

Section: Introductionmentioning

confidence: 99%

Rapid screening of silver nanoparticles for the catalytic degradation of chlorinated pollutants in water

Lugaresi

Perales-Rondón

Minguzzi

et al. 2015

Applied Catalysis B: Environmental

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Please cite this article as: O. Lugaresi, J.V. Perales-Rondón, A. Minguzzi, J. SollaGullón, S. Rondinini, J.M. Feliu, C.M. Sánchez-Sánchez, Rapid screening of silver nanoparticles for the catalytic degradation of chlorinated pollutants in water, Applied Catalysis B, Environmental (2014), http://dx.doi.org/10. 1016/j.apcatb.2014.08.030 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. We suggest the proper size range and the presence of abundant superficial defective sites, such as steps or kinks, as the main reasons for Ag NPs C1 exhibiting the best overall catalytic performance in trichloromethane electrochemical reduction.

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Electrocatalysis on silver and silver alloys for dichloromethane and trichloromethane dehalogenation

Cited by 97 publications

References 19 publications

Electrocatalysis and electron transfer mechanisms in the reduction of organic halides at Ag

Electrocatalysis and electron transfer mechanisms in the reduction of organic halides at Ag

How to Modify Solid Electrodes for Generating New Interfacial Processes — Another Approach in Electro-Chemical Catalysis

Rapid screening of silver nanoparticles for the catalytic degradation of chlorinated pollutants in water

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