Investigation of the Nickel‐Ceria Synergy for Efficient CO 2 Methanation Under Nonthermal Plasma Activation
Abstract
This study investigates the synergy between nonthermal plasma and Ni/CeO 2 catalysts for efficient CO 2 methanation, with a particular focus on the roles of the synthesis route and nickel loading (1–15 wt.%). Catalysts prepared via sol‐gel and impregnation methods were characterized and evaluated under plasma‐assisted reaction. Among the series, the 15 wt.%Ni@CeO 2 ‐gel catalyst led to the highest specific activity (7.3 µmol CH 4 .g −1 .s −1 ). This performance is was attributed to the formation of a defective Ce 1‐x Ni x O 2‐γ solid solution possessing a high density of oxygen vacancies (≈16% Ce 3+ ), which provides basic and defect associated sites for CO 2 adsorption and activation. In contrast, surface basicity was not identified as a determining factor under nonthermal plasma activation. Electrical diagnostics based on Lissajous figures indicated that all catalysts possess a low capacitance (∼5‐35 pF), which is consistent with a discharge propagation on the catalyst surface rather than being localized at contact points. However, this parameter did not directly correlate with catalytic activity. Overall, the results of this study show that the performance of plasma assisted CO 2 methanation relies primarily on the surface defect chemistry, metal‐support interactions, and accessible hydrogenation sites.
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BibTeX
@article{canaff2026investigation,
title = {{Investigation of the Nickel‐Ceria Synergy for Efficient CO 2 Methanation Under Nonthermal Plasma Activation}},
author = {Christine Canaff and Nadia Guignard and Anthony Le Valant and Catherine Batiot-Dupeyrat and Elodie Fourré},
journal = {ChemCatChem},
year = {2026},
month = jul,
doi = {10.1002/cctc.70950},
url = {https://hal.science/hal-05762327v1},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Investigation of the Nickel‐Ceria Synergy for Efficient CO 2 Methanation Under Nonthermal Plasma Activation
AU - Christine Canaff
AU - Nadia Guignard
AU - Anthony Le Valant
AU - Catherine Batiot-Dupeyrat
AU - Elodie Fourré
PY - 2026
DA - 2026/07/25
JO - ChemCatChem
DO - 10.1002/cctc.70950
UR - https://hal.science/hal-05762327v1
AB - This study investigates the synergy between nonthermal plasma and Ni/CeO 2 catalysts for efficient CO 2 methanation, with a particular focus on the roles of the synthesis route and nickel loading (1–15 wt.%). Catalysts prepared via sol‐gel and impregnation methods were characterized and evaluated under plasma‐assisted reaction. Among the series, the 15 wt.%Ni@CeO 2 ‐gel catalyst led to the highest specific activity (7.3 µmol CH 4 .g −1 .s −1 ). This performance is was attributed to the formation of a defective Ce 1‐x Ni x O 2‐γ solid solution possessing a high density of oxygen vacancies (≈16% Ce 3+ ), which provides basic and defect associated sites for CO 2 adsorption and activation. In contrast, surface basicity was not identified as a determining factor under nonthermal plasma activation. Electrical diagnostics based on Lissajous figures indicated that all catalysts possess a low capacitance (∼5‐35 pF), which is consistent with a discharge propagation on the catalyst surface rather than being localized at contact points. However, this parameter did not directly correlate with catalytic activity. Overall, the results of this study show that the performance of plasma assisted CO 2 methanation relies primarily on the surface defect chemistry, metal‐support interactions, and accessible hydrogenation sites.
SN - 1867-3880
SN - 1867-3899
ER -