| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Lundström, Mari
Aalto University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (41/41 displayed)
- 2024Graphite recovery from waste Li-ion battery black mass for direct re-usecitations
- 2023Recent developments of electrodeposition-redox replacement in metal recovery and functional materials: A reviewcitations
- 2023Assessment of environmental sustainability of nickel required for mobility transitioncitations
- 2023Assessment of environmental sustainability of nickel required for mobility transitioncitations
- 2023Flowsheet design and environmental impacts of cobalt co-product recovery from complex Au-Co orescitations
- 2023Emeraldine Salt-Nanocarbon Composites as a Material for Copper Recovery from Industrial Wastewaters
- 2022Carbon Nanotube-Based Thermoelectric Modules Enhanced by ZnO Nanowirescitations
- 2022Electrochemical Growth of Ag/Zn Alloys from Zinc Process Solutions and Their Dealloying Behaviorcitations
- 2022A New Hydrometallurgical Process for Metal Extraction from Electric Arc Furnace Dust Using Ionic Liquidscitations
- 2022Green and Controllable Preparation of Cu/Zn Alloys Using Combined Electrodeposition and Redox Replacementcitations
- 2022Targeted surface modification of Cu/Zn/Ag coatings and Ag/Cu particles based on sacrificial element selection by electrodeposition and redox replacementcitations
- 2021Cyclic voltammetry and potentiodynamic polarization studies of chalcopyrite concentrate in glycine mediumcitations
- 2021Performance-Based Selection of the Cathode Material for the Electrodeposition-Redox Replacement Process of Gold Recovery from Chloride Solutionscitations
- 2021Copper cathode contamination by nickel in copper electrorefiningcitations
- 2021Biopolymeric Anticorrosion Coatings from Cellulose Nanofibrils and Colloidal Lignin Particlescitations
- 2021Copper recovery from industrial wastewater - Synergistic electrodeposition onto nanocarbon materialscitations
- 2020Mechanism of selective gold extraction from multi-metal chloride solutions by electrodeposition-redox replacementcitations
- 2020Mechanism of selective gold extraction from multi-metal chloride solutions by electrodeposition-redox replacementcitations
- 2020A sustainable two-layer lignin-anodized composite coating for the corrosion protection of high-strength low-alloy steelcitations
- 2020Transformation of industrial wastewater into copper–nickel nanowire composites : straightforward recycling of heavy metals to obtain products of high added valuecitations
- 2020Investigation of the anticorrosion performance of lignin coatings after crosslinking with triethyl phosphate and their adhesion to a polyurethane topcoat
- 2019Energy efficient copper electrowinning and direct deposition on carbon nanotube film from industrial wastewaterscitations
- 2019Sulfation Roasting Mechanism for Spent Lithium-Ion Battery Metal Oxides Under SO2-O2-Ar Atmospherecitations
- 2019Modelling of silver anode dissolution and the effect of gold as impurity under simulated industrial silver electrorefining conditionscitations
- 2018A Sustainable Methodology for Recycling Electric Arc Furnace Dustcitations
- 2018Structural distinction due to deposition method in ultrathin films of cellulose nanofibrescitations
- 2018From waste to valuable resource: Lignin as a sustainable anti-corrosion coatingcitations
- 2018A direct synthesis of platinum/nickel co-catalysts on titanium dioxide nanotube surface from hydrometallurgical-type process streamscitations
- 2018Corrosion behaviour of cast and deformed copper-carbon nanotube composite wires in chloride mediacitations
- 2018Selective reductive leaching of cobalt and lithium from industrially crushed waste Li-ion batteries in sulfuric acid systemcitations
- 2018Kinetic study and modelling of silver dissolution in synthetic industrial silver electrolyte as a function of electrolyte composition and temperaturecitations
- 2018Carbon Nanotube Fiber Pretreatments for Electrodeposition of Coppercitations
- 2018Jarogain Process:A Hydrometallurgical Option to Recover Metal Values from RLE Zinc Residue and Steel Dust
- 2018Hydrometallurgical approach for leaching of metals from copper rich side stream originating from base metal productioncitations
- 2018Platinum recovery from Industrial Process Solutions by Electrodepo-sition-Redox Replacement
- 2017Designing gold extraction processes:Performance study of a case-based reasoning systemcitations
- 2017Designing gold extraction processes: performance study of a case-based reasoning systemcitations
- 2017Leaching of Sb from TROF furnace Doré slagcitations
- 2017Simulation of electrochemical processes during oxygen evolution on Pb-MnO2 composite electrodescitations
- 2017Primary Copper Smelter and Refinery as a Recycling Plant—A System Integrated Approach to Estimate Secondary Raw Material Tolerancecitations
- 2016Carbon nanotube-copper composites by electrodeposition on carbon nanotube fiberscitations
Places of action
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article
Simulation of electrochemical processes during oxygen evolution on Pb-MnO2 composite electrodes
Abstract
<p>The geometric properties of Pb-MnO<sub>2</sub> composite electrodes are studied, and a general formula is presented for the length of the triple phase boundary (TPB) on two dimensional (2D) composite electrodes using sphere packing and cutting simulations. The difference in the geometrical properties of 2D (or compact) and 3D (or porous) electrodes is discussed. It is found that the length of the TPB is the only reasonable property of a 2D electrode that follows a 1/r particle radius relationship. Subsequently, sphere packing cuts are used to derive a statistical electrode surface that is the basis for the earlier proposed simulations of different electrochemical mechanisms. It is shown that two of the proposed mechanisms (conductivity and a two-step-two-material kinetic mechanism) can explain the current increase at Pb-MnO<sub>2</sub> anodes compared to standard lead anodes. The results show that although MnO<sub>2</sub> has low conductivity, when combined with Pb as the metal matrix, the behaviour of the composite is not purely ohmic but is also affected by activation overpotentials, increasing the current density close to the TPB. Current density is inversely proportional to the radius of the catalyst particles, matching with earlier experimental results. Contrary to earlier SECM experiments, mass transport of sulphuric acid is not likely to have any influence, as confirmed with simulations. A hypothetical two-step-two-material mechanism with intermediate H<sub>2</sub>O<sub>2</sub> that reacts on both the Pb matrix and MnO<sub>2</sub> catalyst is studied. It was found that assuming quasi-reversible generation of H<sub>2</sub>O<sub>2</sub> followed by its chemical decomposition on MnO<sub>2</sub>, results are obtained that agree with the experiments. If the quasi-reversible formation of H<sub>2</sub>O<sub>2</sub> occurs near the peroxide decomposition catalyst, current increases, leading to an active TPB and to the current density that scales with 1/r. It is further emphasised that both the Pb matrix and MnO<sub>2</sub> catalyst are necessary and their optimum ratio depends on the used current density. Yet, additional experimental evidence is needed to support the postulated mechanism.</p>