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A Noble-Metal-Free Ce0.90Co0.10O2 – δ Catalyst with Enhanced Three-Way Catalytic Performance

A Noble-Metal-Free Ce0.90Co0.10O2 – δ Catalyst with Enhanced Three-Way Catalytic Performance Co ion doped ceria, Ce0.90Co0.10O2 – δ, and Pd ion doped ceria, Ce0.98Pd0.02O2 – δ, were coated on honeycomb structured cordierite monolith by solution combustion method. The dip–dry–heat procedure was followed for the catalyst coating on the monolith. The color of the monolith confirmed the highly crystalline fluorite structure of the catalytic coating. X-ray diffraction and transmission electron microscopy studies confirmed the single phase of Co ion doped CeO2, and the particle size of about 9 nm was determined by the particle-size distribution curve. Ce0.90Co0.10O2 – δ showed little higher catalytic activities than Ce0.98Pd0.02O2 – δ in CO oxidation, hydrocarbons oxidation, and NO reduction by CO. Three-way catalytic reactions over Ce0.90Co0.10O2 – δ were competitively better than those over Ce0.98Pd0.02O2 – δ. The X-ray photoelectron spectroscopy study confirmed that some of Co3+ ions are reduced to Co2+ ions after three-way catalytic reactions on Ce0.90Co0.10O2 – δ catalyst due to the utilization of excess lattice oxygen for the oxidation reaction. Economically, Ce0.90Co0.10O2 – δ catalyst is far preferable than Ce0.98Pd0.02O2 – δ catalyst due to the high expense of noble metals compared to other transition metals. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Kinetics and Catalysis Springer Journals

A Noble-Metal-Free Ce0.90Co0.10O2 – δ Catalyst with Enhanced Three-Way Catalytic Performance

Kinetics and Catalysis , Volume 62 (6) – Nov 1, 2021

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References (47)

Publisher
Springer Journals
Copyright
Copyright © Pleiades Publishing, Ltd. 2021. ISSN 0023-1584, Kinetics and Catalysis, 2021, Vol. 62, No. 6, pp. 756–764. © Pleiades Publishing, Ltd., 2021.
ISSN
0023-1584
eISSN
1608-3210
DOI
10.1134/s0023158421060136
Publisher site
See Article on Publisher Site

Abstract

Co ion doped ceria, Ce0.90Co0.10O2 – δ, and Pd ion doped ceria, Ce0.98Pd0.02O2 – δ, were coated on honeycomb structured cordierite monolith by solution combustion method. The dip–dry–heat procedure was followed for the catalyst coating on the monolith. The color of the monolith confirmed the highly crystalline fluorite structure of the catalytic coating. X-ray diffraction and transmission electron microscopy studies confirmed the single phase of Co ion doped CeO2, and the particle size of about 9 nm was determined by the particle-size distribution curve. Ce0.90Co0.10O2 – δ showed little higher catalytic activities than Ce0.98Pd0.02O2 – δ in CO oxidation, hydrocarbons oxidation, and NO reduction by CO. Three-way catalytic reactions over Ce0.90Co0.10O2 – δ were competitively better than those over Ce0.98Pd0.02O2 – δ. The X-ray photoelectron spectroscopy study confirmed that some of Co3+ ions are reduced to Co2+ ions after three-way catalytic reactions on Ce0.90Co0.10O2 – δ catalyst due to the utilization of excess lattice oxygen for the oxidation reaction. Economically, Ce0.90Co0.10O2 – δ catalyst is far preferable than Ce0.98Pd0.02O2 – δ catalyst due to the high expense of noble metals compared to other transition metals.

Journal

Kinetics and CatalysisSpringer Journals

Published: Nov 1, 2021

Keywords: Ce0.90Co0.10O2 – δ catalyst; characterization; CO oxidation; HC oxidation; CO + NO reaction

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