Hydrothermal Zn–Fe Mixed Oxide Nanocatalysts: Influence of Synthesis Conditions on Physicochemical Properties, Acidity, and Catalytic Activity in the Biginelli Reaction
Abstract
CeNiO 3 catalyst and its modification with manganese were investigated for dry Reforming of methane reaction. The experiments were performed at 700 °C to examine the effect of manganese loading on catalyst activity and stability. A series of ternary perovskite-type oxides CeNi 1-x Mn x O 3 (x = 0, 0.2, 0.4, and 0.6) was synthesized by the self-combustion method. These samples were analyzed by several techniques, including X-ray diffraction, infrared spectroscopy, N 2 adsorptiondesorption isotherm, scanning electron microscope, temperature programmed reduction (TPR) and thermogravimetric (TGA) analysis. The characterization results revealed the presence of the crystalline perovskite phase for all catalysts and an appropriate elemental composition. Catalytic activity decreased with increasing Mn content, with CeNiO 3 showing the highest conversion due to the high reducibility of Ni as indicated by the TPR analysis. While partial substitution of Ni by Mn was found to be highly beneficial in terms of stability. A carbon balance (Xc) equal to 100% was obtained over the substituted catalysts CeNi 1-x Mn x O 3 (x = 0.2, 0.4 and 0.6). This finding was further supported by thermogravimetric analysis (TGA) after 24 h of reaction, which revealed significant coke deposition (~ 25%) on the CeNiO 3 catalyst. In contrast, no carbon deposition was detected on the CeNi 0.4 M 0.6 O 3 .
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BibTeX
@article{slyemi2026hydrothermal,
title = {{Hydrothermal Zn–Fe Mixed Oxide Nanocatalysts: Influence of Synthesis Conditions on Physicochemical Properties, Acidity, and Catalytic Activity in the Biginelli Reaction}},
author = {Samira Slyemi and Juliette Blanchard and Ouzna Kheffache and Hassiba Messaoudi and Sandra Casale and Saremble Guira and Ibtissem Lounas and Meriem Boudjeloud},
journal = {Chemistry Africa},
year = {2026},
month = sep,
doi = {10.1007/s42250-025-01523-6},
url = {https://hal.science/hal-05536826v1},
note = {CC BY-NC 4.0},
}
RIS
TY - JOUR
TI - Hydrothermal Zn–Fe Mixed Oxide Nanocatalysts: Influence of Synthesis Conditions on Physicochemical Properties, Acidity, and Catalytic Activity in the Biginelli Reaction
AU - Samira Slyemi
AU - Juliette Blanchard
AU - Ouzna Kheffache
AU - Hassiba Messaoudi
AU - Sandra Casale
AU - Saremble Guira
AU - Ibtissem Lounas
AU - Meriem Boudjeloud
PY - 2026
DA - 2026/09/03
JO - Chemistry Africa
DO - 10.1007/s42250-025-01523-6
UR - https://hal.science/hal-05536826v1
AB - CeNiO 3 catalyst and its modification with manganese were investigated for dry Reforming of methane reaction. The experiments were performed at 700 °C to examine the effect of manganese loading on catalyst activity and stability. A series of ternary perovskite-type oxides CeNi 1-x Mn x O 3 (x = 0, 0.2, 0.4, and 0.6) was synthesized by the self-combustion method. These samples were analyzed by several techniques, including X-ray diffraction, infrared spectroscopy, N 2 adsorptiondesorption isotherm, scanning electron microscope, temperature programmed reduction (TPR) and thermogravimetric (TGA) analysis. The characterization results revealed the presence of the crystalline perovskite phase for all catalysts and an appropriate elemental composition. Catalytic activity decreased with increasing Mn content, with CeNiO 3 showing the highest conversion due to the high reducibility of Ni as indicated by the TPR analysis. While partial substitution of Ni by Mn was found to be highly beneficial in terms of stability. A carbon balance (Xc) equal to 100% was obtained over the substituted catalysts CeNi 1-x Mn x O 3 (x = 0.2, 0.4 and 0.6). This finding was further supported by thermogravimetric analysis (TGA) after 24 h of reaction, which revealed significant coke deposition (~ 25%) on the CeNiO 3 catalyst. In contrast, no carbon deposition was detected on the CeNi 0.4 M 0.6 O 3 .
SN - 2522-5758
ER -