Controlled Preparation of Different Proportions of Metal Fe-Mn from Waste Mn Ferrite by Molten Salt Electrolysis

Liu, Shiyuan; Wang, Lijun

doi:10.3390/pr8121647

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…Electrodeposition is a popular approach to electrocatalyst synthesis [31][32][33]. By means of electrochemical deposition, particles of various shapes grow directly from the substrate without the need for further treatment.…”

Section: Introductionmentioning

confidence: 99%

“…By means of electrochemical deposition, particles of various shapes grow directly from the substrate without the need for further treatment. The morphologies of metal or alloy deposits can be easily regulated by the choice of parameters and regimes of the electrodeposition [31,34]. In our previous work, it was shown that Sn's morphology and structure depends on the electrolysis conditions, which can produce Sn dendrites of various shapes and degrees of ramification [35].…”

Section: Introductionmentioning

confidence: 99%

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A Novel Two-Step Electrochemical Deposition Method for Sn-Pd Electrocatalyst Synthesis for a Potential Application in Direct Ethanol Fuel Cells

et al. 2023

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Sn-Pd electrocatalysts with a constant atomic ratio of 60 at.% Sn‒40 at.% Pd suitable for potential application in direct ethanol fuel cells were synthesized using a novel two-step electrodeposition method. First, Sn was electrodeposited in various forms of dendrites, from spear-like and needle-like to individual fern-like dendrites to a network of intertwined fern-like dendrites, by varying the cathodic potential and then performing electrodeposition of Pd at a constant current density in the second step. A morphological and elemental analysis of Sn and Sn-Pd electrocatalysts was performed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) techniques, while the size of Sn dendrites was analyzed using the particle size distribution (PSD) method. Cyclic voltammetry (CV) and chronoamperometry were applied in order to study the catalytic behavior of Sn-Pd electrocatalysts in the ethanol oxidation reaction (EOR), while CO stripping was used to estimate the antipoisoning capability of the electrocatalysts. The Sn surface morphology of the sub-layer was highly correlated with the electrocatalytic activity of the examined Sn-Pd electrocatalysts. The high activity it presented towards the EOR showed the suitability of the Sn-Pd electrocatalyst constructed from individual fern-like Sn dendrites as a sub-layer. Compared to Pd alone, this Sn-Pd catalyst showed more than 3 times higher activity and improved EOR kinetics. This enhancement in the catalytic activity of the Sn-Pd electrocatalysts is attributed to both the morphological characteristics of Sn as a sub-layer and the bifunctional effect.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel Two-Step Electrochemical Deposition Method for Sn-Pd Electrocatalyst Synthesis for a Potential Application in Direct Ethanol Fuel Cells

et al. 2023

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“…Many functional groups on the surface such as the carboxyl, hydroxyl, carbonyl, and methoxy groups can affect the fixation and movement of heavy metals (T. T. Fan et al, 2016; Sungur et al, 2016). Many inorganic oxides, such as iron oxides and manganese oxides, have a strong ability to fix metal ions due to their small particles and high specific surface area; thus they have a great impact on the final form of heavy metals in the soil (H. Liu, 2018).…”

Section: Introductionmentioning

confidence: 99%

The Adsorption and Aging Process of Cadmium and Chromium in Soil Micro‐aggregates

Wen

Liao

Li-wei

et al. 2022

Enviro Toxic and Chemistry

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The particle size and components of soil aggregates have played important roles in the migration and transformation of heavy metals. The present study focused on the adsorption behavior and aging characteristics of cadmium (Cd) and chromium (Cr) in various granular aggregates and soil components, which were studied by analyzing the adsorption isotherm, adsorption kinetics, and heavy metal speciation distribution. The results showed that, compared with other aggregates, clay aggregates (0–0.002 mm) had the strongest adsorption effect on Cd and Cr and that there was no significant positive correlation between the adsorption amount and the particle size of aggregates for Cd and Cr. In general, the influence of three components on Cd was organic matter > amorphous iron > free iron oxide, and the influence on Cr was free iron oxide > amorphous iron > organic matter. The adsorption isotherm showed that the correlation coefficient of the Langmuir model (R2) was higher than that of the Freundlich model (R2), indicating that the adsorption of Cd and Cr by soil aggregates can be well described by the Langmuir model with monolayer adsorption behavior. Kinetic adsorption studies showed that quasi‐first‐order kinetics and quasi‐second‐order kinetics were more consistent with the actual adsorption amounts of Cd and Cr in soil aggregates, respectively. At the same time, the forms of Cd and Cr gradually transformed from unstable to stable after entering the soil. After 60 days, Cd was mainly oxidized, and residual, and Cr was mainly reduced and residual. These results provide a theoretical basis for assessing the environmental risks of Cd and Cr and providing prevention and treatment methods. Environ Toxicol Chem 2022;41:975–990. © 2022 SETAC

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Oxide Reduction Treatment with a Thermal Plasma Torch: A Case Study

El Khalloufi,

Soucy

2024

Minerals

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This article presents the findings of a study on oxide reduction utilizing a novel reducing plasma torch, employing greenhouse gases such as CO2 and CH4 as plasma gases. The primary aim of this investigation is to establish the viability of this approach. The innovative plasma torch was employed to reduce various oxides, including aluminum oxide, iron oxide, and titanium oxide, as well as a mixed oxide composition, employing a CO2/CH4 molar ratio of 1:1 within a spouted bed reactor. Following plasma treatment, X-ray diffraction (XRD) analysis was conducted to examine the metallic phases, notably titanium, iron, and aluminum. SEM–EDS observations were carried out to assess microstructural changes and identify elemental compositions pre- and post-plasma treatment. The results demonstrate that within the conical section of the reactor, titanium oxide experiences partial reduction, resulting in limited titanium production, while aluminum oxide and iron oxides (magnetite and hematite) undergo reduction to yield aluminum and iron, respectively. Thermodynamic calculations, performed using Factsage software version 8.3, were utilized to predict stable-phase formations following plasma treatment for each material.

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Controlled Preparation of Different Proportions of Metal Fe-Mn from Waste Mn Ferrite by Molten Salt Electrolysis

Cited by 3 publications

References 16 publications

A Novel Two-Step Electrochemical Deposition Method for Sn-Pd Electrocatalyst Synthesis for a Potential Application in Direct Ethanol Fuel Cells

A Novel Two-Step Electrochemical Deposition Method for Sn-Pd Electrocatalyst Synthesis for a Potential Application in Direct Ethanol Fuel Cells

The Adsorption and Aging Process of Cadmium and Chromium in Soil Micro‐aggregates

Oxide Reduction Treatment with a Thermal Plasma Torch: A Case Study

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