Promotional effect of nickel addition on soot oxidation activity of Ce0.9Pr0.1O2 oxide catalysts

Rajvanshi, Kirti and Patil, Sunaina S and Lakhanlal, . and Dasari, Hariprasad and Saidutta, M B and Dasari, Harshini (2020) Promotional effect of nickel addition on soot oxidation activity of Ce0.9Pr0.1O2 oxide catalysts. Chemical Papers, 74. pp. 4581-4592. ISSN 0366-6352

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Abstract

The present study investigates the promotional efect of Ni addition on soot oxidation activity of Ce0.9Pr0.1O2 oxide catalysts. A series of xNi-PDC (x= 0, 3, 5, 7, 10, 15, and 20 mol%) catalysts were synthesized by solution combustion synthesis method and characterized by XRD, Raman spectroscopy and TEM analysis. XRD and SAED patterns of the catalysts show cubic fuorite structure of ceria with an average crystallite size of 6–8 nm, and only 20Ni-PDC display NiO as a secondary phase. Raman spectra of xNi-PDC catalysts display an increase in oxygen vacancies. With a minimum addition of 10 mol% Ni to PDC, i.e., the 10Ni-PDC catalyst showed optimum soot oxidation activity (T50=360 °C) than compared to PDC and other Ni-PDC catalysts. Lattice strain and oxygen vacancies played a key descriptor role in showing better soot oxidation activity of the 10Ni-PDC catalyst. From the soot oxidation kinetic studies, the activation energy obtained by Ozawa plots for the 10Ni-PDC catalyst is 137 kJ/mol

Item Type: Article
Uncontrolled Keywords: Praseodymium-doped ceria · Nickel doping · Soot oxidation activity · Activation energy · Ozawa plots
Subjects: Engineering > MIT Manipal > Chemical
Depositing User: MIT Library
Date Deposited: 18 Feb 2021 09:11
Last Modified: 18 Feb 2021 09:11
URI: http://eprints.manipal.edu/id/eprint/156421

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