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The development of the hydrogen economy and the latent potential offtake for platinum group metals (PGMS) is a key underpin to the long-term view of future …
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The recovery and purification of platinum group metals (PGMs) from multicomponent solutions are essential for attaining a sustainable circular economy. Herein, we designed redox-active electrosorbents for the separation of PGM chloroanions by leveraging the auto-oxidation of redox electrodes. We synthesized Journal of Materials Chemistry A HOT …
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Abstract Platinum group metal (PGM) nanoparticles (NPs) have been investigated in a variety of research fields such as catalysis and electronics. Alloying has been recognized as one of the most efficient ways of improving or creating properties in metals. Among the types of alloys, solid-solution alloy NPs have the advantage of being …
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Since the first report on solid-solution high-entropy alloys (HEAs) was published in 2004, these materials have been regarded as a paradigm in a wide range of applications (1, 2).Recently, dozens of single-phase HEA nanocrystals or nanostructures and their corresponding intermetallic and oxide derivatives have been developed for …
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Abstract. In spite of very significant progress in performance of platinum group metal-free (PGM-free) electrocatalysts for oxygen reduction reaction (ORR) in the past two decades, the activity and especially the stability and durability of these catalysts remain insufficient. This applies even to the catalysts derived from transition metals ...
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Highly active oxygen reduction non-platinum group metal electrocatalyst without direct metal-nitrogen coordination Nat Commun. 2015 Jun 10:6:7343. doi: 10.1038/ncomms8343. Authors Kara Strickland ... Abstract Replacement of noble metals in catalysts for cathodic oxygen reduction reaction with transition metals mostly create …
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A number of platinum-group element (PGE) oxides and hydroxides have been discovered in a PGE mineralization in the New Caledonia ophiolite complex. They include Pt-Fe oxides containing variable amounts of oxygen (5-50 at.
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Abstract. Base-metal sulphides (BMS) are important host minerals for platinum-group elements (PGE) in orthomagmatic Ni-Cu-PGE deposits. The PGE. Skip to Main Content. ... Platinum-group element enrichment trends in the BMS are similar in the Overysel and Sandsloot samples, although the overall PGE concentrations in the …
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Three major sulfide zones containing platinum group elements (PGE) have been identified in the upper part of the ultramafic sequence of the Great Dyke. The PGE are at the bases of the sulfide zones; the lower two have sparse sulfide mineralization over a thick interval; the upper zone contains higher grade in a thinner stratigraphic layer.
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Abstract. New and recently published platinum-group element data of chromite-rich layers in the Bushveld Complex are evaluated. ... Significant differences in the proportions of platinum-group elements within a particular layer are only evident on a regional scale.The platinum-group minerals of the middle group of chromitite layers in the ...
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The global demand for platinum-group metals (PGMs), including Pt, Pd, and Rh, far exceeds the supply of natural resources. The scarce and inhomogeneous …
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This work therefore studies the alloying effect of the refractory and platinum group elements Zr, Ru, Rh, Pd, Hf, Re, Ir, and Pt and evaluates their potential to increase the high temperature properties of Co-base superalloys (Note: elements with an melting point above 1850 °C, such as Zr, Hf and Re, are considered as refractory elements in …
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Analytical data for the platinum-group elements (PGE) and gold on 17 samples from sulfide-mineralized and -unmineralized rocks of the lower portion of the upper zone and two samples from the main zone of the eastern Bushveld Complex are presented.
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Fleetite, Cu 2 RhIrSb 2, a new species of platinum-group mineral (PGM), was discovered intergrown with an Os–Ir–Ru alloy in the Miass Placer Zone (Au–PGE), southern Urals, Russia.A single grain 50 μm across was found. Osmium, ruthenium, and iridium are the main associated minerals; also present are Pt–Fe alloys, laurite, Sb-rich …
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Abstract. The platinum-group metals (PGMs) are six neighboring elements in the periodic table of the elements. Each PGM can efficiently promote unique …
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Abstract Recovery of platinum group metals from spent materials is becoming increasingly relevant due to the high value of these metals and their progressive depletion. In recent years, there is an increased interest in developing alternative and more environmentally benign processes for the recovery of platinum group metals, in line …
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Abstract The paper considers the current state of Platinum Group Elements (PGEs) geochemistry in the ocean. The behavior of PGEs in the aquatic environment is defined by their oxidation state, the ability to change it, and complexation. The difference in chemical properties leads to PGEs fractionation in the ocean. This is their characteristic …
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Based on the studies of paragenetic assemblages of platinum-group minerals (PGM) from placers and chromitite ores associated with zonal-ring dunite intrusions in the Aldan Shield, on the Siberian platform, a novel model for the PGM formation is offered, which implies separation of a Cr-rich oxide liquid with significant …
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Abstract Accurate determinations of the platinum group elements (PGEs) and gold, known as the precious metals, have always been difficult tasks. The metals are often present at trace levels in sample types of complex composition. This situation has improved recently due to developments of instrumental methods and their applications to analyses ...
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The global demand for platinum-group metals (PGMs), including Pt, Pd, and Rh, far exceeds the supply of natural resources. The scarce and inhomogeneous distribution of the resources, high production costs, and serious environmental risks stimulate the recycling of PGMs from spent automotive catalysts (SAC).
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In a cooling solar nebula, five of the six platinum-group elements (PGE) condense as refractory-metal alloys at temperatures above the condensation of Fe-Ni metal. Non-refractory Pd condenses in solid solution with Fe-Ni. Such refractory alloys are preserved in some meteorites, although they are often highly altered.
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Abstract. The platinum-group metals, ie, platinum, palladium, rhodium, ruthenium, osmium, and iridium, all have high melting points and exceptional corrosion resistance. …
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Abstract. Individual platinum-group elements, as well as Au, Cu, and Ni, were determined in borehole cores of the UG-2 chromitite layer from different. Skip to Main Content ... Variation in the platinum-group mineral assemblages can be explained by variations in the fugacity of sulfur between the various localities studiedpositions of ...
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—Understanding the main events of platinum-group element (PGE) ore formation is impossible without analysis of the sources and behavior of major ore-forming components, namely, platinum, osmium, sulfur, and copper, which are important indicators of magmatic and hydrothermal processes.
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The platinum-group metals (PMGs), ie, platinum, palladium, rhodium, ruthenium, osmium, and iridium, all have high melting points and exceptional corrosion resistance. Platinum, rhodium, and iridium are particularly stable to oxidation at high temperatures. These metals, especially platinum and palladium, show exceptional …
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Abstract. The platinum-group elements (PGE) tend to exist in the metallic state or bond with sulfur or other Group Va and VIa ligands, and often occur as trace accessory minerals in rocks. Combined with three isotopic systems that contain the PGE, these elements afford a unique view of early solar system evolution, planet formation …
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Abstract. Platinum group metals (PGMs) assume an important role within the chemistry and chemical engineering due to their exceptional chemical stability in high …
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Abstract. Low-sulfide platinum group element (PGE) mineralization of the Norilsk-type intrusions is located within the Upper Gabbroic Series, which comprises rocks heterogeneous in texture and composition. The highest grade of 10 to 50 g/t PGEs is confined primarily to chromitiferous taxitic gabbrodolerite, which forms irregular lens- …
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The global demand for platinum-group metals (PGMs), including Pt, Pd, and Rh, far exceeds the supply of natural resources.The scarce and inhomogeneous distribution of the resources, high production costs, and serious environmental risks stimulate the recycling of PGMs from spent automotive catalysts (SAC).
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Abstract. Platinum Group Elements (dominated by palladium) are present in the Ni-Cu-Co bearing massive sulphide ore of the Uitkomst Complex, Mpumalanga Province, South Africa. Mineralogical investigations were conducted in two different parts of the ore body and it was found that these elements are contained in fine-grained mineral …
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