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Nickel Oxide Reduction and the Effect of Metal Sulfates

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Title: Nickel Oxide Reduction and the Effect of Metal Sulfates
Author: Foran, Gabrielle
Department: Department of Chemistry
Program: Chemistry
Advisor: Rowntree, Paul
Abstract: Nickel oxide samples were reduced at temperatures of 350 to 450 C in the presence of metal sulfate additives. Kinetic parameters were measured and used to infer rate of reduction, activation energy and reduction mechanism. The ensemble of these parameters was used to quantify the effect of sample composition and metal sulfate addition on the nickel oxide sample’s reducibility. Reduction mechanisms were determined through the use of linear and residual statistics. The reduced samples were characterized by Raman spectroscopy and SEM/EDX, nickel sulfide species were present on the samples that were pretreated with NiSO4. The sulfide species were further characterized using XPS; it was determined that both Millerite and Heazelwoodite were present. XRD was used to probe the lattice structure to determine the fraction of crystalline metallic nickel. It was found that these samples were 30-40 % amorphous.
Date: 2014-08
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