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Synthesis of a CeO2/Co3O4 catalyst with a remarkable performance for the soot oxidation reaction

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Abstract

A highly active catalyst based on two metal oxides, CeO2/Co3O4, for the low temperature soot oxidation at low temperatures is reported. This catalyst was produced by depositing cobalt oxide by the method of deposition−precipitation with urea onto CeO2 microstructures obtained by the hydrothermal method using urea and citric acid as precipitating agents. Catalytic experiments were performed by temperature programmed combustion, in a fixed-bed microreactor, under loose and tight contact conditions, using Printex-U (Evonik) as the model soot. The results showed that the CeO2/Co3O4 material presented an enhanced activity for the soot oxidation reaction (50% soot conversion at 287 °C) compared with CeO2 (50% soot conversion at 337 °C) and Co3O4 (50% soot conversion at 360 °C) catalysts separately. The catalytic activity for the CeO2/Co3O4 catalyst is higher than the ones reported for Ce–Co based catalysts, tested under similar conditions, for soot oxidation (reduced by 46 °C the lowest temperature reached for the 50% soot conversion).

Graphical abstract: Synthesis of a CeO2/Co3O4 catalyst with a remarkable performance for the soot oxidation reaction

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Article information


Submitted
07 Sep 2019
Accepted
28 Dec 2019
First published
30 Dec 2019

Catal. Sci. Technol., 2020, Advance Article
Article type
Paper

Synthesis of a CeO2/Co3O4 catalyst with a remarkable performance for the soot oxidation reaction

J. C. Medina, S. E. Rodil and R. Zanella, Catal. Sci. Technol., 2020, Advance Article , DOI: 10.1039/C9CY01821B

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