Abstract
MnOx, CeO2, and MnCe-O (Mn/Ce = 1) solids have been prepared via the citrate complexation and combustion method using citrate and urea precursors. The solids have been characterized by XRD, SEM-EDX, N2-adsorption-desorption, UV-Vis spectroscopy, TPR, O2-TPD, and XPS techniques. The catalytic reactivity of the manganese oxides was not affected by the preparation protocol. In the case of ceria and mixed oxides, the synthesis method greatly affected the structural and chemical properties, ultimately altering their reactivity. The citrate complexation method produced the most homogeneous and active mixed oxide, whereas the urea combustion method resulted in less active solids. The mixed oxide prepared via urea combustion was less active than the manganese single oxide; the decrease in activity was attributed to phase separation and the formation of Mn3O4 domains on the surface of ceria. In contrast, citrate complexation resulted in solids with the lowest particle size (~ 3 nm), the highest oxidation state for manganese, and the highest proportion of oxygen vacancies, which promote the oxidation reaction.
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This work was supported by the Algerian Ministry of Higher Education and Scientific Research “MESRS” and USTHB Chemistry Faculty (PhD scholarship and Travel Grant for S. Rahou).
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Rahou, S., Benadda-Kordjani, A., Ivanova, S. et al. Toluene combustion on MnOx, CeO2, and Mn-Ce-O solids prepared via citrate complexation, and citrate and urea combustion methods. J Nanopart Res 25, 114 (2023). https://doi.org/10.1007/s11051-023-05759-6
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DOI: https://doi.org/10.1007/s11051-023-05759-6