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A comparative study of the effect of metal-support interaction on catalytic CO2 methanation over Ni/CexZr1-xO2 catalysts under thermal and plasma conditions
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DOI：10.1039/D5CY00847F.png)
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Abstract
En 中文
Metal-support interaction (MSI) is a well-established strategy for tuning catalytic activity in thermal catalysis; yet its role in nonthermal plasma catalytic CO2 methanation remains insufficiently explored. In this study; the Ni/CexZr1-xO2 catalysts were synthesized using CexZr1-xO2 supports calcined at different temperatures to systematically modulate MSI. A volcano-shaped correlation was observed between catalytic activity and support calcination temperature in both thermal and plasma systems. The CexZr1-xO2 support calcined at 600 °C having a moderate particle size; demonstrated optimum MSI (i.e.; promoting the facile formation of oxygen vacancies and stable interfacial anchoring of Ni particles) and thus the comparatively best catalytic performance under both conditions. Under the tested conditions; thermal CO2 methanation exhibited superior activity compared to plasma-assisted reactions; e.g.; over the NCZ-600 catalyst achieved an 83% CH4 yield at 350 °C versus 11.3% at 7.0 kV. These results underscore the critical role of MSI in governing CO₂ methanation across distinct catalytic environments and highlight its potential as a unifying design principle for both thermal and plasma catalysis.
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