Issue 3, 2020

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

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

Supplementary files

Article information

Article type
Paper
Submitted
07 Sep 2019
Accepted
28 Dec 2019
First published
30 Dec 2019

Catal. Sci. Technol., 2020,10, 853-863

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, 10, 853 DOI: 10.1039/C9CY01821B

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