Dual functional amorphous aluminosilicate sorbents for removing and cold-immobilizing cesium/cobalt/nickel-ions

Cobalt–nickel oxide electrode materials with three-dimensional hexagon films or flower-shaped structures have been synthesized by a chemical precipitation method at different thermal decomposition temperatures. Nickel ions enter into the lattice of Co3O4 by forming solid solution and promote primary nanoparticles partly self-assemble into three-dimensional hexagon films which interlace with each other to form a flower-like structure. Consequently, cobalt–nickel oxide with a Ni/Co mole ratio of 1:6 at 220[Formula: see text]C displays a highest capacitance of 796.16[Formula: see text]F/g at 200[Formula: see text]mA/g and cobalt–nickel oxide with a Ni/Co mole ratio of 1:3 at 200[Formula: see text]C exhibits a highest capacitance of 290[Formula: see text]F/g at 10[Formula: see text]A/g, which significantly improve the electrochemical properties of Co3O4.

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Influence of Remaining Acid Sites of an Amorphous Aluminosilicate on the Oligomerization of n-Butenes after Impregnation with Nickel Ions

Catalysts ◽

10.3390/catal10121487 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1487

Author(s):

Fabian Nadolny ◽

Felix Alscher ◽

Stephan Peitz ◽

Ekaterina Borovinskaya ◽

Robert Franke ◽

...

Keyword(s):

Heterogeneous Catalysts ◽

Acid Sites ◽

Mesoporous Catalyst ◽

Nickel Ions ◽

Methyl Group ◽

Before And After ◽

Amorphous Aluminosilicate ◽

Acid Catalyzed ◽

Catalyzed Reactions ◽

Group Migration

Highly linear octene isomers can be produced from n-butene on industrial scale by using Ni-containing aluminosilicates as heterogeneous catalysts. These catalysts can be prepared by impregnating an aluminosilicate with a Ni(II) salt solution. This leads to a competition between acid-catalyzed and nickel-catalyzed reactions. In this study it is shown that some octene isomers are exclusively formed via an acid-catalyzed mechanism as a result of methyl group migration at the surface of a mesoporous catalyst. Specifically, the isomers 4,4-dimethylhexene (4,4-DMH) and 3-ethyl-2-methylpentene (3E-2MP) exhibit a systematic correlation compared to the amount of 3,4-dimethylhexene (3,4-DMH) formed at acid sites. By analyzing the ratio of 4,4-DMH and/or 3E-2MP to 3,4-DMH in the product spectrum before and after impregnation with a nickel precursor, the extend of acid site covered by nickel ions can be evaluated.

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Dual-Function, Light Switchable Cobalt Catalysis via Active Site Metamorphosis

10.26434/chemrxiv.11353106.v1 ◽

2019 ◽

Author(s):

Enrico Bergamaschi ◽

Frédéric Beltran ◽

Christopher Teskey

Keyword(s):

Visible Light ◽

Active Site ◽

Catalytic Site ◽

Dual Function ◽

Catalytic Systems ◽

Hydride Complex ◽

Dual Functional ◽

Multiple Processes ◽

Olefin Migration

Switchable catalysis offers opportunities to control the rate or selectivity of a reaction via a stimulus such as pH or light. However, few examples of switchable catalytic systems that can facilitate multiple processes exist. Here we report a rare example of such dual-functional, switchable catalysis. Featuring an easily prepared, bench-stable cobalt(I) hydride complex in conjunction with pinacolborane, we can completely alter the reaction outcome between two widely employed transformations – olefin migration and hydroboration – with visible light as the sole trigger. This dichotomy arises from ligand photodissociation which leads to metamorphosis of the active catalytic site, resulting in divergent mechanistic pathways.

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KOVAR A

Alloy Digest ◽

10.31399/asm.ad.fe0003 ◽

1953 ◽

Vol 2 (10) ◽

Keyword(s):

Physical Properties ◽

Surface Treatment ◽

High Resistance ◽

Iron Alloy ◽

Heat Treating ◽

Nickel Iron ◽

Cobalt Nickel ◽

Expansion Curve ◽

Hard Glass ◽

Nickel Iron Alloy

Abstract KOVAR A is a cobalt, nickel, iron alloy recommended for sealing into hard glass. Has similar expansion curve as glass, makes firm bond between metal and glass, is easy to machine and form, and has high resistance to thermal shock. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: Fe-3. Producer or source: Carborundum Company, Refractories Division.

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WIELAND DURO ELMEDUR HA

Alloy Digest ◽

10.31399/asm.ad.cu0906 ◽

2020 ◽

Vol 69 (3) ◽

Keyword(s):

Thermal Conductivity ◽

Physical Properties ◽

Cobalt Nickel ◽

Hardened Condition

Abstract Wieland Duro Elmedur HA is a heat-treatable copper-cobalt-nickel-beryllium alloy. In the age hardened condition, this alloy exhibits high electrical and thermal conductivity along with moderate strength and hardness. This datasheet provides information on composition, physical properties, and hardness. It also includes information on joining. Filing Code: Cu-906. Producer or source: Wieland Duro GmbH.

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ELECTROLESS NICKEL

Alloy Digest ◽

10.31399/asm.ad.ni0332 ◽

1986 ◽

Vol 35 (4) ◽

Keyword(s):

Nickel Coating ◽

Chemical Reduction ◽

Electroless Nickel ◽

Heat Treating ◽

Corrosion And Wear ◽

Sodium Hypophosphite ◽

Work Piece ◽

Nickel Ions ◽

Continuous Contact ◽

Chemical Corporation

Abstract ELECTROLESS NICKEL is a nickel coating deposited by chemical reduction of nickel ions. The most widely used reducing agent is sodium hypophosphite. The thickness of the deposited coating is uniform over all areas of the work-piece that are in continuous contact with fresh plating solution. The process is applicable to a wide variety of metal and nonmetal substrates. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion and wear resistance as well as heat treating and joining. Filing Code: Ni-332. Producer or source: Occidental Chemical Corporation.

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MULTIMET (N-155)

Alloy Digest ◽

10.31399/asm.ad.ss0028 ◽

1961 ◽

Vol 10 (12) ◽

Keyword(s):

High Temperature ◽

Physical Properties ◽

Heat Treating ◽

Age Hardening ◽

Nickel Chromium ◽

Cobalt Nickel ◽

Temperature Performance ◽

High Oxidation ◽

Scaling Resistance ◽

Made In

Abstract MULTIMET alloy is cobalt-nickel-chromium-iron austenitic alloy having high oxidation and scaling resistance along with good high-temperature properties. It tends to work harden but does not respond significantly to age-hardening. It is made in a wrought grade (0.08-0.16% carbon) and a casting grade (0.20% max. carbon). This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep and fatigue. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SS-28. Producer or source: Haynes Stellite Company. Originally published May 1955, revised December 1961.

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