The effect of washing on improving activity of co-precipitated ceria manganese oxide catalysts for volatile organic compound total oxidation

Shah, Parag M., Bailey, Liam A., Jiang, Zhongyu, Morgan, David J. ORCID: https://orcid.org/0000-0002-6571-5731 and Taylor, Stuart H. ORCID: https://orcid.org/0000-0002-1933-4874 2025. The effect of washing on improving activity of co-precipitated ceria manganese oxide catalysts for volatile organic compound total oxidation. Molecular Catalysis 573 , 114796. 10.1016/j.mcat.2024.114796

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Abstract

Ceria-manganese mixed metal oxide catalysts synthesized by co-precipitation and subsequently washed with varying volumes of hot water were evaluated for effectiveness in the total oxidation of propane and naphthalene. The catalytic activity for both reactions improved with increased washing, with the sample washed with two litres of hot water showing the highest activity. Large differences in the structural and chemical properties were apparent between catalysts, with increased washing producing more crystalline material along with formation of Mn2O3 phases. Enhanced washing increased catalyst surface area, decreased concentration of surface contaminants, and increased the concentration of defect oxygen sites, all characteristics known to improve activity for VOC oxidation. This work highlights the need to carefully assess all stages of a catalyst synthesis and identifies washing as an important parameter.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Publisher:	Elsevier
ISSN:	2468-8231
Funders:	EPSRC
Date of First Compliant Deposit:	9 January 2025
Date of Acceptance:	21 December 2024
Last Modified:	21 Jan 2025 11:01
URI:	https://orca.cardiff.ac.uk/id/eprint/175134

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