platinum group surface

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Platinum Group Metals Is Late To The Party - SeekingAlpha

Platinum Group Metals. According to a feasibility study from 2019, cash costs over a 45-year life of mine are estimated at just $640/4E ounce. The net present value (NPV) of Waterberg was ...

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Surface (band) - Wikipedia

Surface was an American music group from New Jersey, active from 1983 to 1994. They are best known for their No. 1 pop and R&B hit "The First Time". During its heyday, the group consisted of singer/bassist Bernard Jackson (born July 11, 1959), [2] David Townsend (May 17, 1955–October 26, 2005), [1] and David Conley (born December 27, 1953). [2]

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The Surface Properties of the Platinum Metals

Several papers were concerned with the detailed atomic arrangement at clean surfaces of platinum group metals. G. Comsa, of KFA Jülich, has scattered helium atoms from a clean platinum surface cut at a small angle to the (111) plane and found direct evidence for an upward bending of the terrace planes of atoms in the vicinity of the downward steps.

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Platinum-group elements - USGS

The platinum-group elements (PGEs)—platinum, palladium, rhodium, ruthenium, iridium, and osmium—are metals that have similar physical and chemical properties and tend to occur together in nature. ... Mining has …

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USGS Mineral Resources Program Platinum-Group …

The platinum-group elements (PGE) include platinum, palladium, rhodium, ruthenium, iridium, and osmium. These metals have similar physical and chemical properties and occur together in nature. ... progressed to depths of 900 m below the surface, but the bottom of the ore deposit has not been reached. Rough geological estimates suggest

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Potential Mobilization of Platinum-Group Elements by …

Platinum-Group Elements by Siderophores in Surface Environments SUSAN R. DAHLHEIMER, CLIVE R. NEAL,* AND JEREMY B. FEIN Civil Engineering and Geological Sciences, University of Notre Dame, Notre Dame, Indiana 46556 The emission of platinum-group elements (PGEs) from catalytic converters has led to increased environmental

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Platinum-Group Metals Plating | Surface Engineering

The electroplating of platinum-group metals (PGMs) from aqueous electrolytes for engineering applications is limited principally to palladium and, to a lesser extent, to platinum, rhodium, and thin layers of ruthenium. This article provides a discussion on the plating operations of these PGMs along with the types of anodes used in the process.

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US3213004A - Surface preparation of platinum group metals …

US3213004A US94137A US9413761A US3213004A US 3213004 A US3213004 A US 3213004A US 94137 A US94137 A US 94137A US 9413761 A US9413761 A US 9413761A US 3213004 A US3213004 A US 3213004A Authority US United States Prior art keywords platinum lead dioxide coating anodic platinum surface Prior art date Legal status (The legal status is …

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Platinum Group Metal - an overview | ScienceDirect Topics

The platinum group metals (PGM) are usually found together and are thus produced together. Their ratio depends on the ore location. Platinum is found in about 0.01 ppm in the earth's crust. The major forms are sperrylite (PtAs 2 ), cooperite (Pt, Pd)S, braggite (Pt, Pd, Ni)S, and as native metals in platinumiridium and palladiplatinum.

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Surface site density and utilization of platinum group metal …

Pyrolyzed iron-based platinum group metal (PGM)-free nitrogen-doped single site carbon catalysts (Fe-NC) are possible alternatives to platinum-based carbon catalysts for the oxygen reduction reaction (ORR). ... ϕ SD surface/bulk enables a quantitative evaluation and comparison of distinct catalyst synthesis routes in terms of their ratio of ...

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Surface Pro 8 – The most powerful Pro – Microsoft Surface

Unlock more possibilities than ever with the Pro designed for a Pro like you. The first Surface Pro built on the Intel® Evo™ platform on select configurations†† and designed to light up the best of Windows 11, Surface Pro 8 combines the power of a laptop with the flexibility of a tablet, and every angle in between, with the iconic Kickstand and detachable Keyboard* with built-in Slim ...

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Platinum - Element information, properties and uses

Element Platinum (Pt), Group 10, Atomic Number 78, d-block, Mass 195.084. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. ... Platinum metal became popular in such pieces due to its pale …

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Potential mobilization of platinum-group elements by …

The emission of platinum-group elements (PGEs) from catalytic converters has led to increased environmental abundances of Pt, Pd, and Rh; however, little is known about the environmental effects and fate of these metals. ... Potential mobilization of platinum-group elements by siderophores in surface environments Environ Sci Technol. 2007 Feb 1 ...

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(PDF) Surface site density and utilization of platinum group …

Surface site density and utilization of platinum group metal (PGM)-free Fe–NC and FeNi–NC electrocatalysts for the oxygen reduction reaction October 2020 Chemical Science 12(1992)

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Platinum 6000, Immersion and Alternation Mattress

Platinum 6000™. Platinum 6000™ incorporates alternating pressure redistribution, immersion, and low air loss therapy to prevent and treat pressure injuries. Surface pressures are read twice per second to maintain interface …

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Surface Oxidation of Platinum-Group Transition Metals in …

The effect of water vapor on the temperature-dependent surface oxidation of Pt-group metals in ambient-pressure gaseous oxygen environments is explored by means of surface-enhanced Raman ...

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Platinum-Group Metal - an overview | ScienceDirect Topics

The platinum group metals are typified by the under-potential deposition (UPD) of hydrogen and thus have become the focus of attention regarding their surface reactivity at the MH region. The hydrogen oxidation catalyst with the highest activity is platinum (or its alloys), and it is being used in most hydrogen–oxygen PEM fuel cells. ...

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platinum | Color, Symbol, Uses, & Facts | Britannica

platinum (Pt), chemical element, the best known and most widely used of the six platinum metals of Groups 8–10, Periods 5 and 6, of the periodic table. A very heavy, precious, silver-white metal, platinum is soft and ductile and has a …

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Platinum-Group Metal - an overview | ScienceDirect Topics

The platinum group metals (PGM) are usually found together and are thus produced together. Their ratio depends on the ore location. Platinum is found in about 0.01 ppm in the earth's crust. The major forms are sperrylite (PtAs 2 ), cooperite (Pt, Pd)S, braggite (Pt, Pd, Ni)S, and as native metals in platinumiridium and palladiplatinum.

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Ngezi Platinum Group Metals Mine, Zimbabwe - Mining …

Its platinum potential has long been recognised. The orebody covers an area of 8km north to south and 1km to 1.5km east to west, and outcrops at the surface. Platinum-group metal mineralisation occurs within a 4m vertical interval within the stratiform deposit.

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Refractory Metals, Platinum Group Metals and Ceramics by …

Platinum group metals are unique among the transition metals because (except for osmium) they combine excellent catalytic activity with low chemical reactivity. ... clusters, and uncoated areas of substrate exist between the clusters. This type of morphology maximizes the surface area of the metal and allows the sides of the clusters, not just ...

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Different mechanisms of CO oxidation on platinum group metal surface ...

Download scientific diagram | Different mechanisms of CO oxidation on platinum group metal surface: (a) Langmuir-Hinshelwood mechanism of CO and O2 co-adsorption, (b) Eley-Rideal mechanism of just ...

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Biological role in the transformation of platinum …

Observations of platinum-group mineral grains and incubation experiments reveal that bacteria can also transform these metals, which could affect their mobility in surface environments. Platinum ...

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The Properties and Applications of Platinum

An alloy of the platinum group metals (PGMs), which includes platinum, was used to decorate the Casket of Thebes, ... Platinum particles chemically attach on to the oxygen and rise to the surface in a froth that is …

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Surface site density and utilization of platinum group …

Pyrolyzed iron-based platinum group metal (PGM)-free nitrogen-doped single site carbon catalysts (Fe-NC) are possible alternatives to platinum-based carbon catalysts for the oxygen reduction reaction (ORR). ... ϕ SD surface/bulk enables a quantitative evaluation and comparison of distinct catalyst synthesis routes in terms of their ratio of ...

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THE PRIMARY PRODUCTION OF PLATINUM GROUP METALS …

The six platinum group metals (PGMs) occur together in nature alongside nickel and copper. Mineable deposits of PGMs are very rare, with annual production amounting to around 400 tonnes, several orders of magnitude lower than many common metals. Due to their economic values and higher quantities, platinum and palladium are the most

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Potential mobilization of platinum-group elements by …

DOI: 10.1021/es0614666 Abstract The emission of platinum-group elements (PGEs) from catalytic converters has led to increased environmental abundances of Pt, Pd, and Rh; however, little is known about the environmental effects and fate of these metals.

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Enhancement of surface self-diffusion of platinum …

Platinum adatoms were deposited onto the clean (1 × 2) reconstructed surface by heating a 99.995% pure Pt wire. Hydrogen was coadsorbed from a constant background pressure. To gain detailed ...

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Surface site density and utilization of platinum group metal …

Pyrolyzed iron-based platinum group metal (PGM)-free nitrogen-doped single site carbon catalysts (Fe–NC) are possible alternatives to platinum-based carbon catalysts for the oxygen reduction reaction (ORR). Bimetallic PGM-free M1M2–NC catalysts and their active sites, however, have been poorly studied to dat Editor's Choice – Jinlong Gong

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Platinum group element-based nanozymes for biomedical ... - PubMed

In recent years, platinum group element (PGE)-based (Pt, Pd, Ru, Rh, Ir, and Os) nanozymes developed successively, have not only promoted the research of nanozymes but also expanded the biomedical applications of nanomaterials. Generally speaking, PGE-based nanozymes process high catalytic efficiency, specific surface area, stability, and other ...

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Surface site density and utilization of platinum group metal …

Surface site density and utilization of platinum group metal (PGM)-free Fe–NC and FeNi–NC electrocatalysts for the oxygen reduction reaction† Fang Luo, a Stephan Wagner,b Ichiro Onishi,c S¨oren Selve, d Shuang Li, e Wen Ju, a Huan Wang,a Julian Steinberg,a Arne Thomas, e Ulrike I. Kramm *b and Peter Strasser *a

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Surface Oxidation of Platinum-Group Transition Metals in …

Platinum is a noble metal that is widely used for the electro-catalytic production of hydrogen, but the surface reactivity of platinum towards water is …

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Surface Area of Platinum Catalysts - technology.matthey.com

For fresh catalysts containing about 0.6 per cent platinum the volumes adsorbed were 15.2 × 10 -6 moles (1) and 21.4 × 10 -6 moles (2): the agreement is encouraging. Now the former figure implies a platinum surface area of 273 m 2 g -1, and that the ratio of adsorbed hydrogen atoms to platinumatoms is 0.99.