Ti3C2 MXenes-based catalysts for the process of α-pinene isomerization - Publication - Bridge of Knowledge

Ti3C2 MXenes-based catalysts for the process of α-pinene isomerization

Abstract

In this study, the catalytic performance of Ti₃C₂ MXene materials in the reaction of α-pinene isomerization was demonstrated. The influence of etching agents (HF, HF/H₂SO_4, and HF/HCl; weight ratios of mixed acids: 1 : 3, 1 : 4, and 1 : 5) on removing Al atoms from MAX phase, creation of an accordion-like structure typical for MXenes and catalytic activity of the produced samples have been revealed. The MXene HF obtained by MAX phase HF treatment exhibited the highest activity (conversion of α-pinene 74.65 mol%), while materials produced with the mixed acids (HF/H₂SO₄ and HF/HCl) showed a significant reduction in the conversion of α-pinene (on average about 28-fold). However, these last samples displayed an increase of about 10 mol% in the selectivity to the most desirable product-camphene. The high activity of MXene HF is a result of a high concentration of acid sites (11.62 mmol g⁻¹) – the concentration of acid sites in the samples obtained by MAX phase mixed acids treatment was about 2.5–5.5 times smaller. This work proposes possible mechanisms for the α-pinene isomerization reaction on the MXene HF and on the MXene HF/H₂SO₄ X : Y and MXene HF/HCl X : Y in connection with their structure.

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Authors (5)

Beata Zielińska dr hab. inż.
- Faculty of Chemical Technology and Engineering
- West Pomeranian University of Technology in Szczecin
Bartosz Środa
- Faculty of Chemical Technology and Engineering
- West Pomeranian University of Technology in Szczecin
Anna Dymerska mgr inż.
- Faculty of Chemical Technology and Engineering
- West Pomeranian University of Technology in Szczecin
Piotr Miądlicki
Agnieszka Wróblewska
- Faculty of Chemical Technology and Engineering
- West Pomeranian University of Technology in Szczecin

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Details

Category:

Magazine publication

Type:

Magazine publication

Published in:

RSC Advances no. 13, pages 30281 - 30292,
ISSN: 2046-2069

Publication year:

2023

DOI:

10.1039/d3ra05055f

Sources of funding:

Project Study on catalytic performance of Ti3C2Tx MXenes

Verified by:

No verification

Referenced datasets

dataset TGA data of MXenes catalysts
dataset Acid site concentrations of the MXenes samples
dataset XRD patterns of MXenes catalysts
dataset Adsorption and desorption of N2 measurement of MXenes catalysts
dataset XPS data of MXene catalyst
dataset GC Chromatograms for isomerization of alpha-pinene
dataset Raman spectra of MXenes catalysts
dataset SEM images of MXene catalysts
dataset XRD patterns of MXenes ashes obtained after TGA measurement

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