Electrocatalytic reduction of chloroform at nanostructured silver electrodes

Brzózka, Agnieszka; Jeleń, Anna; Brudzisz, Anna; Marzec, Mateusz; Sulka, Grzegorz D.

doi:10.1016/j.electacta.2016.12.111

Cited by 26 publications

(22 citation statements)

References 53 publications

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“…Compared to the Ag bulk electrode, ZSM-5 provided more sites for dispersing and stabilizing Ag nanoparticles and promoted Ag nanoparticles' catalytic activity. As a result, The Ag-ZSM-5/SS displayed marvelous electrocatalytic activities towards electrocarboxylation of PhCH 2 Cl, with the electrocarboxylation yield of 61% was obtained at -1.1 V. However, the application of Ag bulk electrode showed a lower yield of 40% at a more negative potential of -1.5 V. Brzózka et al 178 m (Fig. 7 b-d).…”

Section: Electrooxidative Dehalogenation Mechanismsmentioning

confidence: 82%

“…172,177 Ag nanoparticles present distinctive capabilities that are different from the bulk material because of their decreased dimensions and improved surface to volume ratios. 178 For instance, Sui and co-workers 172 fabricated an Ag-ZSM-5/SS zeolite modified electrode with a facile one-step method, and Ag nanoparticles (average diameter of 9 nm) was formed in-situ with ZSM-5 films grown on the stainless steel.…”

Section: Electrooxidative Dehalogenation Mechanismsmentioning

confidence: 99%

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Recent advances in electrocatalysts for halogenated organic pollutant degradation

Chen

Liu

Wei

et al. 2019

Environ. Sci.: Nano

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Section: Electrooxidative Dehalogenation Mechanismsmentioning

confidence: 82%

Section: Electrooxidative Dehalogenation Mechanismsmentioning

confidence: 99%

Recent advances in electrocatalysts for halogenated organic pollutant degradation

Chen

Liu

Wei

et al. 2019

Environ. Sci.: Nano

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“…Film thicknesses in the 20-200 nm range are commonly achieved by varying the electrochemical deposition of sol-gels or ormosils, and pore diameters can be controlled in accord with the size of the PSS nanobeads or the use of alternative templates such as CDs and various generations of PAMAM. Applicability needs to be investigated relative to other means of fabricating nanoarrays such as ion milling [45], aluminum oxide films [46], noble metal modification of aluminum oxide films [47][48][49], and screen-printed titania [50].…”

Section: Formation Of Nanoporous Sol-gel Films On Electrodesmentioning

confidence: 99%

Electroanalysis based on stand-alone matrices and electrode-modifying films with silica sol-gel frameworks: a review

Miecznikowski

Cox

2020

J Solid State Electrochem

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Silica sol-gel matrices and its organically modified analogues that contain aqueous electrolytes, ionic liquids, or other ionic conductors constitute stand-alone solid-state electrochemical cells when hosting electrodes or serve as modifying films on working electrodes in conventional cells. These materials facilitate a wide variety of analytical applications and are employed in various designs of power sources. In this review, analytical applications are the focus. Solid-state cells that serve as gas sensors, including in chromatographic detectors of gas-phase analytes, are described. Sol-gel films that modify working electrodes to perform functions such as hosting electrochemical catalysts and acting as size-exclusion moieties that protect the electrode from passivation by adsorption of macromolecules are discussed with emphasis on pore size, structure, and orientation. Silica sol-gel chemistry has been studied extensively; thus, factors that control its general properties as frameworks for solid-state cells and for thin films on the working electrode are well characterized. Here, recent advances such as the use of dendrimers and of nanoscale beads in conjunction with electrochemically assisted deposition of silica to template pore size and distribution are emphasized. Related topics include replacing aqueous solutions as the internal electrolyte with room-temperature ionic liquids, using the sol-gel as an anchor for functional groups and modifying electrodes with silica-based composites.

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“…At this point, most of the reported studies on the electrocatalytic reduction of organic halides were oriented to explore the mechanism of bond-braking reactions in nonaqueous solutions [8][9][10]. The aqueous solutions were also studied, regardless of the fact that the electrochemical reduction of many organic halides takes place at very negative potentials, at which a simultaneous hydrogen evolution reaction (HER) occurs, significantly increasing the energy consumption of the process [11][12][13][14][15][16][17][18][19]. Nonetheless, further studies on principal aspects of the chloroform electrocatalytic reduction at silver electrodes in aqueous solutions is a crucial step toward environmental applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Supporting Electrolyte on Chloroform Reduction at a Silver Electrode in Aqueous Solutions

2021

Self Cite

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Herein, we report, for the first time, a comparative study on the electrocatalytic reduction of chloroform on silver in different aqueous supporting electrolytes. Cyclic voltammetry measurements were performed at a wide range of scan rates and concentrations of CHCl3 using 0.05 M NaClO4, NaH2PO4, and Na2HPO4 as supporting electrolytes. We observed that a type of supporting electrolyte anion strongly influences both the potential as well as the current density of the chloroform reduction peak, mainly due to the presence of OH− in an alkaline Na2HPO4 solution, which is a specifically interacting anion. Moreover, the highest sensitivity of the Ag electrode toward CHCl3 reduction was observed in a neutral NaClO4 aqueous solution. It was found that the electroreduction of chloroform at the silver surface occurs via a concerted mechanism regardless of the type of the studied supporting electrolyte.

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Electrocatalytic reduction of chloroform at nanostructured silver electrodes

Cited by 26 publications

References 53 publications

Recent advances in electrocatalysts for halogenated organic pollutant degradation

Recent advances in electrocatalysts for halogenated organic pollutant degradation

Electroanalysis based on stand-alone matrices and electrode-modifying films with silica sol-gel frameworks: a review

Effect of the Supporting Electrolyte on Chloroform Reduction at a Silver Electrode in Aqueous Solutions

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