State of Platinum Group Metals and Gold in Mineral Acid Solutions and the Catalytic Activity of These Metals in the Oxidation of N-Methyldiphenylamine-4-Sulfonic Acid

2004 ◽  
Vol 59 (2) ◽  
pp. 185-190 ◽  
Author(s):  
S. S. Aleksenko ◽  
A. P. Gumenyuk ◽  
S. P. Mushtakova
Keyword(s):  
Catalytic Activity ◽  
Sulfonic Acid ◽  
Mineral Acid ◽  
Platinum Group Metals ◽  
Acid Solutions ◽  
Platinum Group

Templating of electrodeposited platinum group metals as a tool to control catalytic activity

2007 ◽  
Vol 52 (28) ◽  
pp. 7910-7919 ◽  
Author(s):  
K.S. Napolskii ◽  
P.J. Barczuk ◽  
S.Yu. Vassiliev ◽  
A.G. Veresov ◽  
G.A. Tsirlina ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Platinum Group Metals ◽  
Platinum Group

Biorecovery of Platinum Group Metals from Secondary Sources

2007 ◽  
Vol 20-21 ◽  
pp. 651-654 ◽  
Author(s):  
Angela J. Murray ◽  
I.P. Mikheenko ◽  
Elzbieta Goralska ◽  
N.A. Rowson ◽  
Lynne E. Macaskie
Keyword(s):  
Catalytic Activity ◽  
Precious Metals ◽  
Bacterial Biomass ◽  
Platinum Group Metals ◽  
X Ray ◽  
Secondary Sources ◽  
Price Increases ◽  
Valuable Product ◽  
Platinum Group

Since 1998 demand for the platinum group metals (PGM) has exceeded supply resulting in large price increases. Undersupply, combined with rising costs prompts environmentally friendly recycling technologies. Leachates containing PGM were produced from secondary waste sources using microwave leaching technology with the aim of recovering precious metals using bacterial biomass. Previous studies showed that metallised biomass exhibits catalytic activity; hence metal is not only recovered but can be converted into a valuable product. Cells of Escherichia coli MC4100 that had been pre-metallised with Pt were more effective at reducing PGM from the leachates. The solid recovered from the leachate onto the bacteria was characterised using X-ray Powder Diffraction (XRD) and Energy Dispersive X-ray Microanalysis (EDX). Metallised biomass was tested for catalytic activity (reduction of Cr(VI) to Cr(III)) to compare the ‘quality’ of polymetallic bacterial-based catalysts versus counterparts made from single and mixed metal model solutions.

Survey of Methods of Refining Catalysts for the Extraction of Platinum Group Metals

2019 ◽  
Vol 946 ◽  
pp. 528-532
Author(s):  
E.A. Devyatykh ◽  
T.O. Devyatykh ◽  
A.N. Boyarsky
Keyword(s):  
Catalytic Activity ◽  
Chemical Reactions ◽  
Precious Metals ◽  
Platinum Group Metals ◽  
Significant Part ◽  
High Catalytic Activity ◽  
Important Condition ◽  
Special Position ◽  
Global Demand ◽  
Platinum Group

Currently, about 80% of all industrial chemical reactions are carried out with the help of catalysts or depend on catalytic processes. In this case, catalysts containing platinum group metals (hereinafter - PGM) occupy a special position, due to their high catalytic activity and selectivity. A significant part of the net global demand for PGM is for the production of catalysts, accounting for approximately 45% for platinum, 30% for palladium, 92% for rhodium, 35% for ruthenium, 15% for iridium. The most important condition for the economical use of catalysts containing precious metals is their efficient recycling, which will be discussed below.

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