Thermal transformation of caffeic acid on the nanoceria surface studied by temperature programmed desorption mass-spectrometry, thermogravimetric analysis and FT–IR spectroscopy

Nastasiienko, Nataliia, Palianytsia, Borys, Kartel, Mykola, Larsson, Mats and Kulik, Tetiana ORCID: https://orcid.org/0000-0002-1740-0348 2019. Thermal transformation of caffeic acid on the nanoceria surface studied by temperature programmed desorption mass-spectrometry, thermogravimetric analysis and FT–IR spectroscopy. Colloids and Interfaces 3 (1) , 34. 10.3390/colloids3010034

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Abstract

The studies of pyrolysis of caffeic acid (CA) and its surface complexes is important for the development of technologies of heterogeneous catalytic pyrolysis of plant- and wood- based renewable biomass components. In this work, the structure and thermal transformations of the surface complexes of CA on the surface of nanoceria were investigated using Fourier transform–infrared (FT–IR) spectroscopy, thermogravimetric analysis (TGA) and temperature-programmed desorption mass spectrometry (TPD MS). It was found that CA on the surface of cerium dioxide forms several types of complexes: bidentate carboxylates, monodentate carboxylates and complexes formed as a result of interaction with phenolic hydroxyl groups. This is due to the ability of nanosized cerium dioxide to generate basic hydroxyl groups that can deprotonate phenolic groups to form phenolates on the surface. The main pyrolysis products were identified. The possible ways of forming 3,4-dihydroxyphenylethylene, acetylene carboxylic acid, pyrocatechol and phenol from surface complexes of CA were suggested. It was established that on the nanoceria surface effectively occur the decarboxylation, decarbonylation, and dehydration reactions of the CA, which are the desirable processes in biomass conversion technologies.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Chemistry Schools > Physical, Chemical & Environmental Sciences
Publisher:	MDPI
Date of First Compliant Deposit:	10 November 2026
Date of Acceptance:	5 March 2019
Last Modified:	10 Nov 2026 12:30
URI:	https://orca.cardiff.ac.uk/id/eprint/190812

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