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 paper, the authors measured the diffusion coefficient of carbon and barium oxide coatings on nickel and found that the rates of reaction are diffusion limited over a wide range of conditions of interest.
Abstract: Experimental values for the solubility of carbon in nickel in the range 700°C to 1300°C yield the equation lnS=2.480−4,880/T, where S is the solubility in grams of carbon per 100 grams of nickel. Values obtained for the diffusion coefficient in the same range fit the equation lnD=0.909−20,200/T, where D is in cm2 per second. These results are of some interest in the problem of the activation of thermionic oxide coated cathodes, and the experimental method used to measure the diffusion coefficients is related to phenomena occurring in vacuum tubes. To extend the usefulness of the results in this direction, rates of reaction between diffused carbon and barium oxide coatings on nickel have been measured. It was found that the rates are diffusion limited over a wide range of conditions of interest.
269 citations
TL;DR: In this article, the corrosion behavior of Fe, Cr, Ni, the ferritic alloys Fe 15Cr and Fe 35Cr and the austenitic alloys Alloy 800, Alloy 825 and Alloy 600 at temperatures between 400 and 700°C using discontinuous exposures and thermogravimetric experiments.
269 citations
TL;DR: In this article, the CO2 ligand possesses bent geometry and is co-ordinated through the carbon atom and one of the oxygen atoms, and can be made either by treating [Ni(PCy3)3] with CO2 in toluene, or by direct reduction of [NiBr2(PCY3)2] with sodium sand under CO2.
Abstract: [Ni(CO2)(PCy3)2],0·75(C7H8), where Cy = cyclohexyl, can be made either by treating [Ni(PCy3)3] or [{Ni(PCy3)2}2N2] with CO2 in toluene, or by direct reduction of [NiBr2(PCy3)2] with sodium sand under CO2; the complex is planar, the CO2 ligand possesses bent geometry and is co-ordinated through the carbon atom and one of the oxygen atoms.
269 citations
TL;DR: In this article, the surface species formed by adsorption of atomic hydrogen on alumina has been characterized by a desorption peak at 480 °C in the temperature-programmed desorptions.
269 citations
TL;DR: The outstanding catalytic performance and strong durability, in comparison to the advanced non-noble metal catalysts, are derived from the porous nanostructure fabrication, Fe incorporation, and selenization, which result in fast charge transportation and large electrochemically active surface area and enhance the release of oxygen bubbles from the electrode surface.
Abstract: Exploring non-noble and high-efficiency electrocatalysts is critical to large-scale industrial applications of electrochemical water splitting. Currently, nickel-based selenide materials are promising candidates for oxygen evolution reaction due to their low cost and excellent performance. In this work, we report the porous nickel–iron bimetallic selenide nanosheets ((Ni0.75Fe0.25)Se2) on carbon fiber cloth (CFC) by selenization of the ultrathin NiFe-based nanosheet precursor. The as-prepared three-dimensional oxygen evolution electrode exhibits a small overpotential of 255 mV at 35 mA cm–2 and a low Tafel slope of 47.2 mV dec–1 and keeps high stability during a 28 h measurement in alkaline solution. The outstanding catalytic performance and strong durability, in comparison to the advanced non-noble metal catalysts, are derived from the porous nanostructure fabrication, Fe incorporation, and selenization, which result in fast charge transportation and large electrochemically active surface area and enhanc...
268 citations