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Smirnov, M. K.; Smetanin, A. V.; Турыгин, В. В.; Khudenko, A. V.; Томилов, А. П.

doi:10.1023/a:1012366929250

Cited by 10 publications

(4 citation statements)

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“…Brusciotti and Duby [12] found that the evolution of arsine became negligible on Pt and Cu electrodes at controlled potentials. Smirnov and coworkers [13,14] discovered that Pb electrode was favorable for the evolution of arsine and that the current efficiency for arsine evolution reached to 70%.…”

Section: Introductionmentioning

confidence: 99%

A study on the evolution of arsine during arsenic electrodeposition: The influence of ammonium citrate

Shan

Ruan

2012

Electrochemistry Communications

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Section: Introductionmentioning

confidence: 99%

A study on the evolution of arsine during arsenic electrodeposition: The influence of ammonium citrate

Shan

Ruan

2012

Electrochemistry Communications

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“…However, with the gold microwire electrode it was reported that the ASV response was decreasing with time, which has been ascribed to gold-chloride deposits on the electrode surface (13), oxidation of the gold surface by chlorine generated at the counter electrode during the deposition step, arsenite reduction to arsine at the working electrode (14) and oxidation to As(V). Therefore, different supporting electrolytes (with pH 1): 0.1M HNO 3 As shown in figure 2, the mixture of 0.1 M H 2 SO 4 and 0.5 M KCl supports highest responded peak current for As(III) speciation.…”

Section: Supporting Electrolytementioning

confidence: 99%

“…Hydrochloric acid (HCl) has been used as supporting electrolyte for numerous As(III) electrochemical analyses (11,12). However, with the gold microwire electrode it was reported that the ASV response was decreasing with time, which has been ascribed to gold-chloride deposits on the electrode surface (13), oxidation of the gold surface by chlorine generated at the counter electrode during the deposition step, arsenite reduction to arsine at the working electrode ( 14) and oxidation to As(V). Therefore, different supporting electrolytes (with pH 1): 0.1M HNO 3 , 0.1M H 2 SO 4 , 0.1M HClO 4 and 1M H 3 PO 4 solutions, as well as 0.1M HNO 3 /0.5M KCl, 0.1M H 2 SO 4 /0.5M KCl and 0.1M HClO 4 /0.5M KCl mixtures were tested in this research.…”

Section: Supporting Electrolytementioning

confidence: 99%

Determination of Inorganic Arsenic As(III) in Water by Linear Sweep Anodic Stripping Voltammetry Using Gold Ultra-Microelectrode Array

Duong

et al. 2015

ECS Trans.

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A gold ultra-microelectrode array has been developed for the determination of arsenic As(III) ions by linear sweep anodic stripping voltammetry (LSASV). The deposition potential (E dep ) and time (t dep ) and supporting electrolytes were investigated. The repeatability, linearity, accuracy of the proposed method and the effect of pH and interference ions were evaluated. It was found that As(III) can be determined by the proposed method using our developed gold ultra-microwire electrode at any pH including the pH values typical for natural waters. Well defined voltammetric waves at E dep = -0.450 V (vs. Ag/AgCl/3M KCl reference electrode), t dep = 100 s and 1.000 V.s -1 scan rate are obtained in 1M H 3 PO 4 supporting electrolyte. A good linear relationship between LSASV peak current and As(III) concentration is observed for the typical values in natural waters and in arsenic contaminated ones. The limit of detection was 2 ng.L -1 (signal-to-noise ratio = 3). The obtained results suggested that the fabricated gold chip would facilitate monitoring of As(III) in natural waters by linear sweep anodic stripping voltammetry.

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“…However, the electrocatalytic reduction process inevitably leads to the competing hydrogen evolution reaction (HER), limiting the conversion of As(III) to As(0) . Furthermore, it has been previously reported that under acidic conditions, the electrocatalytic reduction of As(III) to As(0) can produce highly toxic gaseous AsH 3 , which poses significant environmental threats. − Enhancing the conversion efficiency of As(III) and preventing the formation of byproducts require the reduction of proton concentration near the cathode to suppress HER. , Therefore, it is crucial to electrochemically reduce highly mobile As(III) to solid-state As(0) rather than gaseous AsH 3 to tackle arsenic contamination in water.…”

Section: Introductionmentioning

confidence: 99%

Direct Electrocatalytic Reduction of As(III) on CuSn Alloy Electrode: A Green and Sustainable Strategy to Recover Elemental Arsenic from Arsenic Wastewater

Zheng,

Li,

et al. 2024

Ind. Eng. Chem. Res.

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Arsenic contamination in groundwater and industrial wastewater poses a significant threat to human health and the ecosystem. Electrochemical reduction of highly mobile As(III) species into less toxic elemental arsenic (As(0)) has emerged as a promising method to effectively recover arsenic from water. In this study, a novel CuSn alloy nanowire array-modified copper foam (CuSn NAs/CF) electrode was fabricated for the direct electrochemical reduction of As(III) to As(0). The electrocatalytic reduction of As(III) was systematically investigated under various reaction conditions, including current densities, solution pH, electrolytes, and initial As(III) concentrations. The CuSn NAs/CF electrode was proven to effectively suppress the hydrogen evolution reaction and greatly enhance the electrochemical reduction of As(III). The recovery yield of As(0) on the CuSn NAs/CF electrode reached 3.67 mg/cm 2 at 90 min of electrolysis in a 0.1 M Na 2 SO 4 at pH 11, which was 2.75 times higher than that of the Cu NAs-modified electrode. Furthermore, the as-prepared electrode also demonstrated excellent electrochemical stability and a longer service life, maintaining a recovery yield of As(0) at 2.62 mg/cm 2 even after 6 cycles. The reduction reaction mechanism of As(III) was ascribed to the synergistic effect of direct electrolysis and hydrogen radicals (•H) formation, as revealed by ESR and radical scavenger experimental results. This study not only provides convincing evidence for the direct electrochemical conversion of As(III) to As(0) on an innovative CuSn alloy electrode, but also offers a promising strategy to recover and reuse waste arsenic resources. This contributes to a sustainable and environmentally friendly approach to arsenic-containing wastewater treatment.

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Cited by 10 publications

References 0 publications

A study on the evolution of arsine during arsenic electrodeposition: The influence of ammonium citrate

A study on the evolution of arsine during arsenic electrodeposition: The influence of ammonium citrate

Determination of Inorganic Arsenic As(III) in Water by Linear Sweep Anodic Stripping Voltammetry Using Gold Ultra-Microelectrode Array

Direct Electrocatalytic Reduction of As(III) on CuSn Alloy Electrode: A Green and Sustainable Strategy to Recover Elemental Arsenic from Arsenic Wastewater

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