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Methodology for the identification of carbonyl absorption maxima of carbon surface oxides in DRIFT spectra

Herold, Felix ; Leubner, Oliver ; Jeschonek, Katharina ; Hess, Christian ; Drochner, Alfons ; Qi, Wei ; Etzold, Bastian J.M. (2024)
Methodology for the identification of carbonyl absorption maxima of carbon surface oxides in DRIFT spectra.
In: Carbon Trends, 2021, 3
doi: 10.26083/tuprints-00026760
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Item Type: Article
Type of entry: Secondary publication
Title: Methodology for the identification of carbonyl absorption maxima of carbon surface oxides in DRIFT spectra
Language: English
Date: 24 April 2024
Place of Publication: Darmstadt
Year of primary publication: 2021
Place of primary publication: Amsterdam
Publisher: Elsevier
Journal or Publication Title: Carbon Trends
Volume of the journal: 3
Collation: 13 Seiten
DOI: 10.26083/tuprints-00026760
Corresponding Links:
Origin: Secondary publication service
Abstract:

Carbon surface oxides have been demonstrated to be crucial for high performing carbon materials in various applications. Diffuse reflectance infrared Fourier transform spectroscopy represents a powerful time-resolved method to study the surfaces of functional materials under process conditions. Due to the severe overlap of the contributions of individual surface groups in combination with compared to organic molecules shifted absorption maxima meaningful analysis remains challenging. Especially due to the unknown maxima, deconvolution of the superimposed bands is strongly hindered. In this study, we developed a procedure based on hydrolysis, thermal annealing or a combination thereof, which allows to disentangle carbonyl absorption maxima of carboxylic acids, anhydrides and lactones on carbon surfaces. In order to verify the proposed transformations, thorough characterization by temperature programmed desorption, X-ray photoelectron spectroscopy, potentiometric titration and Boehm titration was carried out. Applying this procedure for a polymer derived reference material, the carbonyl absorption maximum could be deduced, which are positioned for lactones at 1771 cm⁻¹, for carboxylic acids between 1753 cm⁻¹ and 1760 cm⁻¹, and for carboxylic anhydrides at 1792 cm⁻¹ and 1852 cm⁻¹. This allowed deconvolution of the carbonyl band, paving the way for in situ time-resolved analyses.

Uncontrolled Keywords: Oxygen surface groups on carbon, Selective surface functionalization, DRIFTS, TPD
Identification Number: Artikel-ID: 100020
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-267603
Classification DDC: 500 Science and mathematics > 540 Chemistry
Divisions: 07 Department of Chemistry > Eduard Zintl-Institut > Physical Chemistry
07 Department of Chemistry > Ernst-Berl-Institut > Fachgebiet Technische Chemie > Technische Chemie I
Date Deposited: 24 Apr 2024 12:30
Last Modified: 05 Aug 2024 10:00
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/26760
PPN: 520311795
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