Catalytic upgrading of phenolic compounds using ceria-based materials

Nelson, Nicholas M.

doi:10.2172/1593322

Cited by 2 publications

(2 citation statements)

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Section: Introductionmentioning

confidence: 99%

“…In the last few years, CeO 2 -based materials have attracted much attention due to their wide use in various catalytic systems [1][2][3][4][5][6]. The success of ceria and ceria-based materials in catalysis is often due to facile Ce 4+ /Ce 3+ redox cycling without disruption of the fluorite lattice structure [6]. At the same time the redox and acid-base properties of ceria, either alone or in the presence of transition metals, are important parameters that allow activation of complex organic molecules and selective orientation of their transformation [5].…”

Section: Introductionmentioning

confidence: 99%

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Thermal Transformation of Caffeic Acid on the Nanoceria Surface Studied by Temperature Programmed Desorption Mass-Spectrometry, Thermogravimetric Analysis and FT–IR Spectroscopy

Nastasiienko

Palianytsia

Кartel

et al. 2019

Colloids and Interfaces

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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.

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