ChemInform Abstract: THALLIUM PALLADIUM OXIDE (TLPD3O4) AND THALLIUM PLATINUM OXIDE (TLPT3O4) - TERNARY PLATINUM METAL OXIDES WITH CLUSTER STRUCTURE

1978 ◽  
Vol 9 (47) ◽  
Author(s):  
C. ZOELLNER ◽  
G. THIELE ◽  
M. MUELLNER
Keyword(s):  
Metal Oxides ◽  
Cluster Structure ◽  
Platinum Metal ◽  
Platinum Oxide ◽  
Palladium Oxide

Study of Processing Hllw by Super High Temperature Method. Part II*. Reducing Reactions and Formation of Complex Oxides in the Simplified Hllw

1994 ◽  
Vol 353 ◽  
Author(s):  
Masayosi Uno ◽  
Youji Kadotani ◽  
Chie Miyake ◽  
Misato Horie
Keyword(s):  
Metal Oxides ◽  
Melting Temperature ◽  
Complex Oxides ◽  
Platinum Metal ◽  
Reducing Agents ◽  
Metallic Elements ◽  
X Ray Diffraction ◽  
Zirconium Oxides ◽  
Temperature Method ◽  
Sublimation Point

AbstractThe reducing reactions of platinum metal oxides and the formation of the complex oxides were studied to estimate the process at high temperatures. Heat treatment of Re207 with TiN causes reduction up to the sublimation point of Re207 and exhibits the highest value of the recovery among the reducing agents used in the present study. Reducing reactions of the platinum metal oxides with the reducing agents lower the melting temperature. The simplified complex oxides contain the complex oxides of the representative elements of FP and the metallic elements of the reducing agents, which contribute to a decrease of melting temperature, neodymium zirconium oxides and neodymium barium oxide which may transform to the other phases during heating. Uranium may dissolve in the phases in which uranium is identified by EPMA but cannot detected by X-ray diffraction.

Photoreduction and reoxidation of platinum oxide and palladium oxide surfaces

1986 ◽  
Vol 90 (21) ◽  
pp. 5317-5320 ◽  
Author(s):  
T. H. Fleisch ◽  
Gilbert J. Mains
Keyword(s):  
Platinum Oxide ◽  
Palladium Oxide ◽  
Oxide Surfaces

scholarly journals Modeling the effects of temperature and time of homogenization annealing on the hardness of PdNi5 alloy

2014 ◽  
Vol 68 (5) ◽  
pp. 597-603
Author(s):  
Aleksandra Ivanovic ◽  
Biserka Trumic ◽  
Svetlana Ivanov ◽  
Sasa Marjanovic
Keyword(s):  
Experimental Design ◽  
Gas Flow ◽  
Platinum Metal ◽  
Platinum Oxide ◽  
System Response ◽  
Pd Catalyst ◽  
Experimental Planning ◽  
Metal Form ◽  
Full Factorial Experimental Design ◽  
Experimental Values

Experimental design methodology represents a powerful tool for the analysis and optimization of various processes. PdNi5 alloy is used in the in the production process of nitric acid, as Pd-catalyst-trap. The role of Pd-catalyst-trap consists in reduction of volatile platinum oxide from gas flow to the metal form and retention of platinum metal on the surface of Pd catalyst-trap. Fundamental knowledge about this alloy and its practical use in reduction of volatile platinum oxide, can be improved by experimental planning and statistical analysis. In this study, the effects of annealed temperature and annealed time on the hardness of PdNi5 alloy were evaluated and compared. Full factorial experimental design at three levels was applied. Statistically significant factors were determined considering of hardness of PdNi5 alloy as a system response. By regression analysis, the mathematical model for process description was derived. The correlation between predicted and experimental values was high (R2=0,976 ). In the investigated ranges of parameters, the obtained empirical equation can be applied for the prediction of system response.

scholarly journals Study of lifetime of Platinum Modified Metal Oxides Electrodes

2020 ◽  
Vol 14 (4) ◽  
pp. 1479-1488
Author(s):  
Lemeyonouin Aliou Guillaume Pohan ◽  
Ollo Kambiré ◽  
Mohamed Berté ◽  
Lassiné Ouattara
Keyword(s):  
Metal Oxides ◽  
Platinum Metal ◽  
Porous Structures ◽  
Term Stability ◽  
Long Term Stability ◽  
Physical Measurements ◽  
Platinum Coating ◽  
The One ◽  
A Current

Pt, IrO2, RuO2, Pt-IrO2 and Pt-RuO2 electrodes have been shown to be effective in their application in various fields. However, it is necessary to study their long-term stability. So, our objective is to prepare them and study their lifetime using intensiostatic measurement. Then they were prepared at 400 °C on titanium plates used as a substrate. Physical measurements (scanning electron microscopy) of these anodes revealed that their surface are rough and porous structures. Lifetime study was carried out in H2SO4 9 N and under a current density of 410 mA /cm2. The long-term stability of Pt improved when coupled to IrO2 in contrast to RuO2. From this study, the performance of the electrode was found to increase in the order: RuO2 < Pt-RuO2 < Pt < Pt-IrO2 < IrO2. For RuO2 and IrO2 pure electrodes, the deactivation would be due to the dissolution of precursors deposited on the titanium. For the Pt pure electrode, deactivation would be due to the detachment of platinum coating. The deactivation of the Pt-IrO2 and Pt-RuO2 electrode would be due, on the one hand to the platinum detachment from IrO2 or RuO2 and on the other hand to the metal oxides (IrO2 or RuO2) dissolution.Keywords: Electrodes, platinum, metal oxides, lifetime.

Synthesis and properties of platinum metal oxides of the type MxPt3O4

1982 ◽  
Vol 21 (9) ◽  
pp. 3372-3382 ◽  
Author(s):  
R. D. Shannon ◽  
T. E. Gier ◽  
P. F. Carcia ◽  
P. E. Bierstedt ◽  
R. B. Flippen ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Platinum Metal

Characterization of palladium oxide catalysts supported on nanoparticle metal oxides for the oxidative coupling of 4-methylpyridine

2011 ◽  
Vol 335 (1-2) ◽  
pp. 210-221 ◽  
Author(s):  
Luke M. Neal ◽  
Michael L. Everett ◽  
Gar B. Hoflund ◽  
Helena E. Hagelin-Weaver
Keyword(s):  
Metal Oxides ◽  
Oxidative Coupling ◽  
Oxide Catalysts ◽  
Palladium Oxide

scholarly journals Impact of Various Acids and Bases on the Voltammetric Response of Platinum Group Metal Oxides

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Sebastian Chalupczok ◽  
Peter Kurzweil ◽  
Helmut Hartmann
Keyword(s):  
Metal Oxides ◽  
Tap Water ◽  
Platinum Group Metal ◽  
Platinum Metal ◽  
Domestic Sewage ◽  
Ph Sensors ◽  
Practical Applications ◽  
Ph Values ◽  
Voltammetric Behavior ◽  
Acids And Bases

The voltammetric response of platinum metal oxides is discussed with respect to novel pH sensors combining both miniaturization and stability. For practical applications in solutions of any kind, for example, in tap water and in domestic sewage, various interferences must be considered, such as chloride and reducing agents. This work clarifies the voltammetric behavior of RuO2 electrodes in solutions of different pH values and ionic strengths.

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