Platinum Group Dissolution

Platinum group - Wikipedia

09-12-2003· The platinum-group metals (abbreviated as the PGMs; alternatively, the platinoids, platinides, platidises, platinum group, platinum metals, platinum family or platinum-group elements (PGEs)) are six noble, precious metallic elements clustered together in the periodic table.These elements are all transition metals in the d-block (groups 8, 9, and 10, periods 5 and 6).

Dissolution of noble metals in highly concentrated acidic ...

Highly concentrated solutions of AlCl3·6H2O and Al(NO3)3·9H2O were investigated for Au and platinum group metals dissolution. 95% Pd was leached from spent automotive catalysts in 15 min at 80 °C, while Pt required longer times; Rh dissolution was <20%. Au dissolution …

Impact of platinum group metals (Ru, Pd, Rh) on the ...

01-01-2020· The effect of metallic particles containing Platinum Group Metal (PGM) elements on the dissolution of sintered UO 2 samples was examined through the development of multiparametric dissolution tests on sintered UO 2 and UO 2 + 3 mol.% PGM samples. This effect was found to be more important for C HNO3 < 1 mol L −1 whereas it was lowered for higher nitric acid concentrations due to …

Dissolution behaviour of platinum group metals into …

Dissolution behaviour of platinum group metals into molten slags Kazuki Morita Institute of Industrial ScienceThe University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan Correspondence [email protected]

Impact of platinum group metals (Ru, Pd, Rh) on the ...

Impact of platinum group metals (Ru, Pd, Rh) on the dissolution of UO2. Journal Pre-proof Impact of platinum group metals (Ru, Pd, Rh) on the dissolution of UO2 Théo Cordara, Solène Bertolotto, Laurent Claparede, Stéphanie... Download PDF . Tweet. 3MB Sizes 0 Downloads 5 Views. Report.

Dissolution behaviour of platinum group metals into …

Dissolution behaviour of platinum group metals into molten slags Article in Mineral Processing and Extractive Metallurgy IMM Transactions section C 123(1):29-34 · March 2014 with 45 Reads

Dissolution of platinum group metals from materials ...

19-04-1994· This invention relates to the dissolution of platinum group metals (PGM) from materials containing said metals. BACKGROUND OF THE INVENTION. General speaking, the dissolution of precious metals, such as PGM's, was thought to be possible only by the use of aggressive chemicals.

Structure dependency of the atomic-scale mechanisms of ...

24-08-2020· Platinum dissolution and restructuring due to surface oxidation are primary degradation mechanisms that limit the lifetime of platinum-based electrocatalysts for electrochemical energy …

About – Platinum Group Solutions

PLATINUM SOLUTIONS GROUP is a REPRESENTATION company based in Italy serving the Latin American markets: Mexico, Caribbean Islands, Central and South America. We have had offices in Colombia, Argentina, India and China since 2011 to look for more proximity and direct contact with our clients, thus raising their satisfaction with our management.

Leaching platinum-group metals in a sulfuric acid/chloride ...

01-04-2003· A leaching process was established based on the ability of platinum-group metals to form stable chloro-complexes in acidic chloride solutions. Industrial catalyst losses were examined for the recovery of platinum, palladium, and rhodium by leaching with a mixture of sulfuric acid and sodium chloride to avoid using aqua regia or autoclave conditions.

Dissolution behaviour of platinum group metals into …

Dissolution behaviour of platinum group metals into molten slags Kazuki Morita Institute of Industrial ScienceThe University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan Correspondence [email protected]

Dissolution behaviour of platinum group metals into …

Dissolution behaviour of platinum group metals into molten slags Article in Mineral Processing and Extractive Metallurgy IMM Transactions section C 123(1):29-34 · March 2014 with 45 Reads

Chemical speciation study of platinum group elements in ...

18-11-1998· A chemical speciation study method for platinum group elements in geological samples was developed, including stepwise dissolution, nickel sulphide fi…

Impact of platinum group metals (Ru, Pd, Rh) on the ...

Impact of platinum group metals (Ru, Pd, Rh) on the dissolution of UO2. Journal Pre-proof Impact of platinum group metals (Ru, Pd, Rh) on the dissolution of UO2 Théo Cordara, Solène Bertolotto, Laurent Claparede, Stéphanie... Download PDF . Tweet. 3MB Sizes 0 Downloads 5 Views. Report.

Enhanced Dissolution of Platinum Group Metals Using ...

Enhanced Dissolution of Platinum Group Metals Using Electroless Iron Deposition Pretreatment Article in Metallurgical and Materials Transactions B 48(6) · September 2017 with 26 Reads

Dissolution of platinum group metals from materials ...

19-04-1994· This invention relates to the dissolution of platinum group metals (PGM) from materials containing said metals. BACKGROUND OF THE INVENTION. General speaking, the dissolution of precious metals, such as PGM's, was thought to be possible only by the use of aggressive chemicals.

US Patent for Dissolution of platinum group metals from ...

A method is provided for the dissolution of at least one precious metal selected from the group consisting of platinum group metals, gold and silver. The method comprises subjecting a material containing at least one of the precious metals to dissolution with a sulfuric acid solution maintained at a pH at least sufficient to complex the precious metal with bromide ions in the presence of an ...

Platinum recycling going green via induced surface ...

21-10-2016· Jovanovič, P. et al. New insight into platinum dissolution from nanoparticulate platinum-based electrocatalysts using highly sensitive in situ concentration measurements. ChemCatChem 6, …

Extraction of Platinum Group Metals | IntechOpen

02-10-2017· Platinum group metals (PGMs) are a group of six elements, namely iridium (Ir), osmium (Os), platinum (Pt), palladium (Pd), rhodium (Rh) and ruthenium (Ru) [1, 2].PGMs together with gold and silver are classified as noble or precious metals because of their high corrosion and oxidation resistance [1, 2, 3].The world’s reserves of platinum group metals/elements are estimated at 100 million ...

RECYCLING OF PLATINUM GROUP METALS FROM AUTOMOTIVE ...

Platinum 2012 695 R. Rumpold, J. Antrekowitsch RECYCLING OF PLATINUM GROUP METALS FROM AUTOMOTIVE CATALYSTS BY AN ACIDIC LEACHING PROCESS R. Rumpold University of Leoben J. Antrekowitsch University of Leoben Abstract The platinum group metals (PGMs) palladium, platinum, and rhodium represent the key

Platinum group | chemical element group | Britannica

Platinum group, six metals, in order of increasing atomic weight, ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), and platinum (Pt). The elements all possess a silvery white colour—except osmium, which is bluish white. The chemical behaviour of these metals is paradoxical

The electrochemical dissolution of the platinum-group ...

Get this from a library! The electrochemical dissolution of the platinum-group metals by alternating-current electrolysis with particular reference to platinum and palladium. [Michael P Kelly]

US Patent for Dissolution of platinum group metals from ...

A method is provided for the dissolution of at least one precious metal selected from the group consisting of platinum group metals, gold and silver. The method comprises subjecting a material containing at least one of the precious metals to dissolution with a sulfuric acid solution maintained at a pH at least sufficient to complex the precious metal with bromide ions in the presence of an ...

Université de Montpellier - Impact of platinum group ...

The effect of metallic particles containing Platinum Group Metal (PGM) elements on the dissolution of sintered UO2 samples was examined through the development of multiparametric dissolution tests on sintered UO2 and UO2 + 3 mol.% PGM samples. This effect was found to be more important for CHNO3 < 1 mol L−1 whereas it was lowered for higher nitric acid concentrations due to the preponderant ...

Electrochemical dissolution of metals of the platinum ...

DISSOLUTION OF METALS OF THE PLATINUM GROUP method of dissolution is a promising technique especially when large amounts of gold halides are required. In particular, such a technique has the advantage of producing nitrate-free halides. At i < 5 Acre -2 the dissolution rate decreased sharply and the electrode became passive again.

Recovery of platinum group metals from secondary …

12-09-2020· @article{Dawson2006RecoveryOP, title={Recovery of platinum group metals from secondary materials. I. Palladium dissolution in iodide solutions}, author={R. Dawson and G. Kelsall}, journal={Journal of Applied Electrochemistry}, year={2006}, volume={37}, pages={3-14} } Thermodynamic predictions are ...

US4188362A - Process for the treatment of platinum …

A process for the dissolution of precious metal values in a concentrate thereof wherein the concentrate is caused to alloy with aluminum and the alloy is then leached in at least two steps, the first of which is to remove base metals and in the second of which the precious metals are dissolved using hydrochloric acid and chlorine gas or nitric acid as an oxidant.

Particle Size Effect on Platinum Dissolution ...

Polymer electrolyte membrane fuel cells (PEMFCs) are highly attractive for use in electric vehicles. In PEMFCs, small particle sizes of the Pt catalyst are required to increase Pt utilization, which lower costs and also increase Pt dispersion, which itself minimizes O2 mass transport losses. Reducing the particle size improves both the utilization and dispersion; however, stability of small ...

Particle Size Effect on Platinum Dissolution: Practical ...

The high costs of polymer membrane electrolyte fuel cells (PEMFCs) remain a roadblock for a competitive market with combustion engine vehicles. The PEMFC costs can be reduced by decreasing the size of Pt nanoparticles in the catalyst layer, thereby increasing the Pt dispersion and utilization. Furthermore, high-power performance loss due to O2 transport resistance is alleviated by decreasing ...

Potential Dependence of Pt and Co Dissolution from ...

30-11-2019· Therefore, the bulk of our understanding of Pt and transition metal dissolution from Pt and Pt alloy catalysts, including real-time resolution of the dissolution processes during potential cycling, has been obtained through aqueous studies. 5–10 For example, earlier aqueous studies have established that a) Pt oxides play a role in Pt dissolution at potentials higher than 0.9 V, 5,7,11,12 b ...

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