Topic
Nickel
About: Nickel is a research topic. Over the lifetime, 79308 publications have been published within this topic receiving 1210058 citations. The topic is also known as: Ni & element 28.
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TL;DR: In this article, the adsorption mechanism of nickel at a molecular level was attributed to chemical interaction between nickel and the surface functional groups of MWCNTs and surface adsorbed SDBS.
185 citations
TL;DR: In this paper, Ni/Co molar ratio was investigated for Ni/CNT composite electrode and the highest specific capacitance was obtained at Ni/co molar ratios = 1:1.
184 citations
TL;DR: It was found that there is no significant lateral interaction between the adsorbed CO2 at 1/4 monolayer (ML) coverage, while there is stronger repulsive interaction at1/2 ML.
Abstract: CO2 chemisorption on the Ni(111), Ni(100), and Ni(110) surfaces was investigated at the level of density functional theory. It was found that the ability of CO2 chemisorption is in the order of Ni(110) > Ni(100) > Ni(111). CO2 has exothermic chemisorption on Ni(110) and endothermic chemisorption on Ni(111), while it is thermally neutral on Ni(100). It is also found that there is no significant lateral interaction between the adsorbed CO2 at 1/4 monolayer (ML) coverage, while there is stronger repulsive interaction at 1/2 ML. On all surfaces, the chemisorbed CO2 is partially negatively charged, indicating the enhanced electron transfer, and the stronger the electron transfer, the stronger the CO bond elongation. The bonding nature of the adsorbed CO2 on nickel surfaces has been analyzed. The thermodynamics of CO2 dissociative chemisorption, compared with CO and O adsorption, has been discussed, and the thermodynamic preference is in the sequence Ni(100) > Ni(111) > Ni(110).
184 citations
TL;DR: In this article, the micropores of various kinds of anodic oxide films on aluminum were electrodeposited into the barrier layer and fine granular metals precipitated on the barrier layers and formed columnar structures.
Abstract: Cobalt and Co‐Ni alloy were electrodeposited into the micropores of various kinds of anodic oxide films on aluminum. Fine granular metals precipitated on the barrier layer and formed columnar structures. Although the films of cobalt or nickel showed remarkable magnetic anisotropies perpendicular to the surface, the alloy films which consisted of approximately 50% cobalt showed a strong anisotropy along the horizontal direction. Coercive forces ranged from about 500 to about 1100 oe and the density of residual magnetization rose above 1000 gauss. The films may have applications in magnetic memories and recording devices.
184 citations
TL;DR: In this article, X-ray photoelectron and ion scattering spectroscopies provided evidence that nickel does not interact with a silica support but forms nickel monoxide; that on..gamma..-alumina, low nickel contents form two nickel species which interact with the support, of which one is in tetrahedral alumina sites and difficult to reduce and the other, in octahedral sites and easy to reduce.
Abstract: Studies of supported nickel catalysts by X-ray photoelectron and ion scattering spectroscopies provided evidence that nickel does not interact with a silica support but forms nickel monoxide; that on ..gamma..-alumina, low nickel contents form two nickel species which interact with the support, of which one is in tetrahedral alumina sites and difficult to reduce and the other, in octahedral sites and easy to reduce; that at higher calcination temperatures, nickel in octahadral sites diffuses to tetrahadral sites; and that higher nickel loadings on ..gamma..-alumina, nickel monoxide forms on top of the interacting nickel species. The studies were performed with 2-33.2Vertical Bar3< nickel on ..gamma..-alumina and 4-35Vertical Bar3< nickel on silica, prepared by impregnation with nickel nitrate and calcined at 400/sup 0/-600/sup 0/C.
184 citations