Effect of morphology and oxidation state of nickel on diesel soot oxidation activity
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Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Ltd
Abstract
NiO sample is synthesized using the EDTA citrate complex method and calcined at 600 °C/5 h. Ni sample was acquired by reducing NiO to Ni at 600 °C in 4% H<inf>2</inf>/N<inf>2</inf> atmosphere. Its physicochemical properties were obtained by XRD and Raman spectroscopy analysis, where it confirmed the complete reduction of NiO to Ni. SEM and TEM micrographs revealed a drastic particle growth for the Ni, indicating NiO sintering during the reduction process and a considerable surface morphology change. Ozawa and KAS methods were used to calculate the mean activation energy (E<inf>a</inf>) value. NiO displayed lower E<inf>a</inf> than Ni. Hence, NiO showed better catalytic activity than Ni. © 2022
Description
Keywords
Activation energy, Catalyst activity, Diesel engines, Morphology, Nanoparticles, Oxidation, Physicochemical properties, Sintering, Soot, Surface morphology, Transmission electron microscopy, X ray powder diffraction, Citrate complex, Complex methods, Diesel soot oxidation, Ethylene diamine tetra-acetic acid, Ethylenediamine tetra acetic acid-citrate complex method, Nanoparti-cles, Oxidation activities, Oxidation state, Physicochemical property, Synthesised, Nickel oxide
Citation
Materials Today: Proceedings, 2022, 57, , pp. 1865-1870