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CO Oxidation Properties Of Selective Dissoluted Metallic Glass Composites

Kim S. Y., Lee M. H., Kim T. S., Kim B. S.

Archives of Metallurgy and Materials

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2015

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Vol. 60, iss. 2B

1227--1229

EN

Porous metallic materials have been widely used in many fields including aerospace, atomic energy, electro chemistry and environmental protection. Their unique structures make them very useful as lightweight structural materials, fluid filters, porous electrodes and catalyst supports. In this study, we fabricated Ni-based porous metallic glasses having uniformly dispersed micro meter pores by the sequential processes of ball-milling and chemical dissolution method. We investigated the application of our porous metal supported for Pt catalyst. The oxidation test was performed in an atmosphere of 1% CO and 3% O2. Microstructure observation was performed by using a scanning electron microscope. Oxidation properties and BET (Brunauer, Emmett, and Teller) were analyzed to understand porous structure developments. The results indicated that CO Oxidation reaction was dependent on the specific surface area.

2

Nano- Au/MgF2 and Au/MgO Catalysts in Oxidation of CO

Ruszel M., Grzybowska B., Małecka M. A., Kępinski L., Sobczak J., Wojciechowska M.

Polish Journal of Chemistry

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2009

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Vol. 83, nr 6

1185-1193

EN

Au/MgF2 catalyst is more active in CO oxidation than Au/MgO prepared in the same conditions, in spite of lower efficiency of Au deposition on the MgF2 surface. Its activity decreases (in contrast to Au/MgO) after the hydrogen pre-treatment. Higher activities of Au/MgF2 as compared to Au/MgO prepared in the same conditions, can be due to smaller Au particle size on the MgF2 support as shown by TEM, and to the presence of anionic Au delta– species.

3

The Influence of Reduction Pretreatment of Pt/SnO2 Catalysts on the Catalytic Performance in CO Oxidation

Chylak I., Szychowska A., Kocemba I., Rynkowski J.

Polish Journal of Chemistry

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2008

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Vol. 82, nr 1-2

69-75

EN

The influence of reduction pretreatment of Pt/SnO2 catalysts on the catalytic performance in CO oxidation reaction was investigated.We can state that the catalytic activity of samples greatly depends on the kind of reducing agent and temperature of reduction. The obtained results were explained supposing that platinum can interact with tin dioxide and strong metal-support interactions (SMSI) are created. We concluded that hydrogen can create SMSI effect more easily than carbon monoxide.

4

Oxidation of CO and Propane on Pt-Au/Al2O3 Catalysts

Ruszel M., Grzybowska-Świerkosz B., Karpiński Z., Juszczyk W.

Polish Journal of Chemistry

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2008

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Vol. 82, nr 10

1991-1997

EN

Alumina-supported bimetallic Pt-Au catalysts appeared to be superior to that containing Pt alone in oxidation of CO and propane. Such a catalytic behaviour in combination with previous physical characterization data suggests that Pt and Au remain intimately mixed in the form of Pt-Au bimetallic particles and that the presence of Au in these particles modifies the behaviour of Pt. Reasons for the occurrence of this synergistic effect are discussed.

5

Cobalt Containing Zeolite Systems: Red-ox Properties and Catalytic Activity

Lutsenko L. V., Oleksenko L. P., Chen Y.

Polish Journal of Chemistry

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2008

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Vol. 82, nr 1-2

113-119

EN

The influence of zeolite nature on catalytic activity of Co-containing systems of CO oxidation was investigated. It is established that the activity of catalysts increases in the order 10%Co-NaA < 10%Co-NaM < 10%Co-NaZSM-5(37) < 10%Co-NaZSM-5(69). The cobalt spinelCoCo2O4 formed on the surface of zeolite supports is established to be an active phase. The TPR-H2 study of Co-zeolite systems showed that the content of cobalt cations with high reducibility in the surface layer was the largest for the most active catalyst Co-NaZSM-5(69).

6

Application of Semiconductor Pt/SnO2-based Sensor to Investigation of CO Oxidation Reaction

Szychowska A., Chylak I., Wróbel-Jędrzejewska M., Kocemba I., Rynkowski J.

Polish Journal of Chemistry

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2008

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Vol. 82, nr 1-2

49-55

EN

Pt/SnO2-based pellistors and resistive sensors were applied to analysis of CO oxidation mechanism. Oscillatory behavior of the system was observed, the probable mechanism explaining the occurrence of oscillations was proposed.

7

CO oxidation over the Au catalyst - the state of art

Dobrosz I., Kocemba I., Rynkowski J.M.

Polish Journal of Chemical Technology

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2005

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Vol. 7, nr 3

27-34

EN

Gold catalysts have recently been attracting rapidly growing interest due to their potential applications to many reactions, of both industrial and environmental importance. The oxidation of CO is one of the significant reactions. This article presents an overview of the recent study on more important factors that determine the catalytic activity of supported gold catalysts in CO oxidation reaction, with an emphasis on those that provide some information on the underlying chemistry. The criteria that must be met before high catalytic activity can be obtained, and the extreme sensitivity of the final catalyst to all stages of its preparation and treatment before use, are summarized. The influence of the preparation method, the size of the gold particle, the nature of the support and the effect of chloride on the catalysts performance as well as a conclusive analysis of the mechanism of CO oxidation over supported gold catalysts were presented.