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Catalytic performance of the Ce-doped LaCoO3 perovskite nanoparticles
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Abstract A series of La 1-x Ce x CoO 3 perovskite nanoparticles with rhombohedral phases was synthesized via sol–gel chemical process. X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), Electron Diffraction Spectroscopy (EDS), Thermogravimetric Analysis (TGA), UV–Vis spectroscopy, Fourier Transform Infrared spectra (FTIR), Nitrogen Adsorption/desorption Isotherm, Temperature Program Reduction/Oxidation (TPR/TPO), X-ray Photoelectron Spectroscopy (XPS) techniques were utilized to examine the phase purity and chemical composition of the materials. An appropriate doping quantity of Ce ion in the LaCoO 3 matrix have reduced the bond angle, thus distorting the geometrical structure and creating oxygen vacancies, which thus provides fast electron transportation. The reducibility character and surface adsorbed oxygen vacancies of the perovskites were further improved, as revealed by H 2 -TPR, O 2 -TPD and XPS studies. Furthermore, the oxidation of benzyl alcohol was investigated using the prepared perovskites to examine the effect of ceria doping on the catalytic performance of the material. The reaction was carried out with ultra-pure molecular oxygen as oxidant at atmospheric pressure in liquid medium and the kinetics of the reaction was investigated, with a focus on the conversion and selectivity towards benzaldehyde. Under optimum reaction conditions, the 5% Ce doped LaCoO 3 catalyst exhibited enhanced catalytic activity (i.e., > 35%) and selectivity of > 99%, as compared to the other prepared catalysts. Remarkably, the activity of catalyst has been found to be stable after four recycles.
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Metadata
- Authors
- Ansari, A. A., Adil, S. F., Alam, M., Ahmad, N., Assal, M. E., Labis, J. P., & Alwarthan, A.
- Affiliations
- King Saud University (SA)
- Corresponding author
- Ansari, Anees A.
- Venue
- Scientific Reports
- Published
- 2020-09-14
- Volume
- 10
- Issue
- 1
- Pages
- 15012-15012
- ISSN
- 2045-2322 (ISSN-L)
- PMC
- PMC7490716
- OpenAlex
- W3085474473
- Cited by
- 128
- References
- 65
- Citations by year
- 2026: 28 · 2025: 35 · 2024: 19 · 2023: 22 · 2022: 16 · 2021: 7 · 2020: 1
- FWCI
- 4.48
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Reports (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Funders
- King Saud University (RG-1439-089)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
- Physical Sciences › Chemical Engineering › Catalysis › Catalysis and Oxidation Reactions
- Physical Sciences › Materials Science › Materials Chemistry › Advancements in Solid Oxide Fuel Cells
- Keywords
- LaCoO3 perovskite, cerium doping, rhombohedral phase, perovskite nanocrystals, oxygen vacancies, reducibility, benzyl alcohol oxidation, benzaldehyde selectivity, heterogeneous catalysis, catalyst stability, sol-gel synthesis, reaction kinetics
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