rare earth platinum

Rare-earth–platinum alloy nanoparticles in

2020-9-9 · Alloy nanoparticles of platinum and rare-earth elements are formed using zeolites with pore-wall defects, producing stable, highly active and selective catalysts for the propane dehydrogenation

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Rare-earth-platinum alloy nanoparticles in

The method works well when using easily reducible late transition metals, but Pt alloy formation with rare-earth elements through the H 2 reduction route is almost impossible owing to the low chemical potential of rare-earth element oxides 6. Here we use as support a mesoporous zeolite that has pore walls with surface framework defects (called 'silanol nests') and show that the zeolite enables alloy formation between Pt and rare-earth

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Rare-earth–platinum alloy nanoparticles in

2020-9-9 · Request PDF Rare-earth–platinum alloy nanoparticles in mesoporous zeolite for catalysis Platinum is a much used catalyst that, in petrochemical processes, is often alloyed with other metals

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Rare earth—platinum group mixed metal oxide

1994-8-1 · The rare earth-platinum group double oxides are one such family of systems for which particular structure types have been characterized but for which no overview of phase development exists. Rare earth-platinum group mixed metal oxide (RE-PG--O) systems comprise approximately 90 systems where RE represents the elements 57La-71Lu and 39Y and PG represents the two triads

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Rare Earth Oxide Anchored Platinum Catalytic Site Coated

2020-2-4 · Rare Earth Oxide Anchored Platinum Catalytic Site Coated Zeolitic Imidazolate Frameworks toward Enhancing Selective Hydrogenation. ACS Applied Materials & Interfaces ( IF 8.758 ) Pub Date : 2020-01-23,DOI: 10.1021/acsami.9b19867. Liangmin Ning,Shengyun Liao,Caiqiao Dong,Mingtao Zhang,Wen Gu,Xin Liu. Controlling and manipulating the self-assembly

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Rare-Earth-Metal/Platinum Heterobinuclear

2009-12-3 · Rare-Earth-Metal/Platinum Heterobinuclear Complexes Containing Reactive Ln-alkyl groups (Ln = Y, Lu): Synthesis, Structural Characterization, and Reactivity

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Rare-earth-platinum alloy nanoparticles in mesoporous

2020-9-10 · Rare-earth-platinum alloy nanoparticles in mesoporous zeolite for catalysis. Platinum is a much used catalyst that, in petrochemical processes, is often alloyed with other metals to improve catalytic activity, selectivity and longevity 1,2,3,4,5.

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Rare Earth Oxide Anchored Platinum Catalytic Site

2021-3-12 · Rare Earth Oxide Anchored Platinum Catalytic Site Coated Zeolitic Imidazolate Frameworks toward Enhancing Selective Hydrogenation ACS Applied Materials & Interfaces

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Novel Synthesis Routes of Platinum Rare Earth Metal

Platinum rare earth metal alloy nanoparticles with an improved particle size distribution are obtained. Eventually, it is found for the first time that platinum and the respective rare earth metal salts alloy at elevated temperatures in the presence of potassium vapor.

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What’s So Special About Platinum? HowStuffWorks

2019-7-11 · Platinum is a naturally occurring chemical element that is actually about 30 times rarer than gold, according to Jenny Luker, president of Platinum Guild International USA (PGI), a marketing organization for the platinum

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Rare-earth-platinum alloy nanoparticles in mesoporous

2020-9-10 · Rare-earth-platinum alloy nanoparticles in mesoporous zeolite for catalysis. Nature ( IF 42.778 ) Pub Date : 2020-09-09,DOI: 10.1038/s41586-020-2671-4

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Rare Earth Oxide Anchored Platinum Catalytic Site Coated

2020-2-4 · Rare Earth Oxide Anchored Platinum Catalytic Site Coated Zeolitic Imidazolate Frameworks toward Enhancing Selective Hydrogenation. ACS Applied Materials & Interfaces ( IF 8.758 ) Pub Date : 2020-01-23,DOI: 10.1021/acsami.9b19867

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Rare-Earth Manganites: Surface-Segregated Platinum

Crushed and etched lanthanum lead manganite (La0.7Pb0.3MnO3) crystals containing as little as 0.005 atomic percent platinum have significantly higher catalytic activity than free platinum crystals. This higher activity is due to an almost 100-fold segregation of platinum on the surface. The surface platinum concentration found, 0.5 atomic percent, is sufficient to account for the enhanced

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Platinum–rare earth electrodes for hydrogen

2013-3-19 · Platinum (Pt) alloys are known to possess good catalytic activities towards the hydrogen evolution reaction (HER). However, virtually nothing is known about the effects of rare earth (RE) elements on the electrocatalytic behaviour of Pt towards the HER.

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TRACE, RARE EARTH ELEMENT (REE) AND PLATINUM

May 10, 2010 11:58 AOGS SE 9in x 6in b951-v20-ch03 Trace, Rare Earth Element (REE) and Platinum Group Element (PGE) 59 suggested that all the Proterozoic terrains in this region appear to have

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7th Intl. Symp. on Rare Earth and Platinum Group

SIPS 2021 by FLOGEN Stars Outreach hosts the 7th International Symposium on Rare Earth and Platinum Group Metals: Managing and Processing which is chaired by Dr. Claudio Capiglia and includes diverse topics such as the sustainable management, extraction and processing or rare Earth metals and Platinum Group elements, managing supply chain risks for critical and strategic metals, end-user

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Levels of platinum group elements and rare-earth

Levels of platinum group elements and rare-earth elements in wild mushroom species growing in Poland. Mleczek M(1), Niedzielski P(2), Kalač P(3), Siwulski M(4), Rzymski P(5), Gąsecka M(1). Author information: (1)a Department of Chemistry,Poznan University of Life Sciences,Poznan,Poland.

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Rare Earth Elements MIT

2012-12-11 · Rare earth elements occur in many minerals but typically in concentrations too low to be refined in an economical manner; the concentration of REEs in the Earth's crust is estimated to be between 150 to 220 parts per million, which is higher than the concentration of other metals mined for industrial use, such as Cu or Zn.

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Caught between rare earths and Chinese dominance

2021-4-23 · Xu Guangxian, a U.S. educated chemist, developed China’s first rare earth processing technology (circa 1972). Xu eventually helped successive Chinese leaders develop China’s national rare

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How Rare Are Precious Metals The Royal Mint

How rare are precious metals? The best known precious metals are of course gold and silver, which have both been made into currency and objects of art since before recorded history began. However, the platinum group of elements (platinum itself, palladium, iridium, osmium, rhodium and ruthenium) are also important precious metals.

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Platinum–rare earth electrodes for hydrogen

2013-3-19 · Platinum (Pt) alloys are known to possess good catalytic activities towards the hydrogen evolution reaction (HER). However, virtually nothing is known about the effects of rare earth (RE) elements on the electrocatalytic behaviour of Pt towards the HER.

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Magnetic structures of the rare-earth platinum

1998-11-1 · The rare-earth (R) platinum aluminides RPtAl crystallize in the orthorhombic TiNiSi-type structure (space group Pnma, Z = 4), where magnetic rare-earth atoms form a network of chains parallel to the a-axis and parallel to the b-axis. Magnetic structures and phase transitions of RPtAl (R = Ce, Pr, Nd) compounds were investigated by systematic

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Levels of platinum group elements and rare-earth

Due to limited data-describing abilities of mushrooms to accumulate platinum group elements (PGEs) and rare-earth elements (REEs), the aim of this study was to determine, by inductively coupled plasma optical emission spectrometry followed by microwave-assisted sample digestion by nitric acid, the content of these elements in 20 mushroom species (10 above ground and 10 growing on wood), mostly

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Bimetallic rare-earth/platinum complexes ligated by

2016-3-17 · Bimetallic rare-earth/platinum complexes ligated by phosphinoamides F. Völcker and P. W. Roesky, Dalton Trans., 2016, 45, 9429 DOI: 10.1039/C6DT00417B This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is

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[PDF] Synthesis of Platinum Rare Earth Alloy Catalysts

This PhD thesis presents the work performed on synthesising catalytically active platinum rare earth alloys for use in fuel cells. For fuel cells to become an integral part of the future transportation sector, the activity of platinum, the cathode catalyst of choice, has to be improved significantly. Alloying is a common way to improve the activity of platinum, however, true long term

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TRACE, RARE EARTH ELEMENT (REE) AND PLATINUM

May 10, 2010 11:58 AOGS SE 9in x 6in b951-v20-ch03 Trace, Rare Earth Element (REE) and Platinum Group Element (PGE) 59 suggested that all the Proterozoic terrains in this region appear to have

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Critical Minerals & Materials: Chemical and Materials

While multiple elements have been identified as critical based on their availability and technological importance, this funding opportunity is restricted to basic research related to rare earth and platinum

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What’s So Special About Platinum? HowStuffWorks

2019-7-11 · Platinum Vs. Gold. Platinum is a naturally occurring chemical element that is actually about 30 times rarer than gold, according to Jenny Luker, president of Platinum Guild International USA (PGI), a marketing organization for the platinum jewelry industry."If all the platinum ever mined were melted and poured into an Olympic-sized pool, the platinum would barely reach your ankles.

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How Rare Are Precious Metals The Royal Mint

How rare are precious metals? The best known precious metals are of course gold and silver, which have both been made into currency and objects of art since before recorded history began. However, the platinum group of elements (platinum itself, palladium, iridium, osmium, rhodium and ruthenium) are also important precious metals.

Get Price

New Frontiers in Rare Earth Science and Applications

New Frontiers in Rare Earth Science and Applications, Volume I consists of extended abstracts of the lectures, papers, and posters presented at the International Conference on Rare Earth Development and Applications held in Beijing on September 10-14, 1985.

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Gyratory Crusher Interact Portable Crushers For Hire North East Area

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