Abstract: Present research reports on the novel CO2 methanation (CME) Ni- and Ni-Ce catalysts supported on carbon nanotubes (CNTs). Ni on CNT (Ni-NT) systems featured spherical Ni nanoparticles 4 nm–20 nm in size, while Ni-Ce-NT catalysts formed a “shish-kebab”-like structures with 5 nm–6 nm Ni and 4 nm–6 nm CeO2 nanoparticles. CME performance of the systems suggests the presence of a Ni particle size effect, with larger particles characterized by slower kinetics. As a result, 20Ni-NT system, as the one with sufficiently high loading and 6 nm Ni nanoparticles, was found to have the highest overall and Ni-mass specific activity among CNT-supported systems. CeO2 addition was found to improve CME activity over ceria-free references, due to the activation of CO2 via the interaction with oxygen vacancies in ceria. Combined, these synergistic effects contribute to 8Ni-20Ce-NT and 19Ni-5Ce-NT showing respectively 6.5- and 40-times higher mass-specific rates than those for 20 wt% Ni on ceria. The most efficient catalytic system in a set was 8Ni-20Ce-CNT with 98 % CH4-selectivity at 82 % yield (at 290 °C) (WHSV = 36.2 h−1). Ni-Ce-NT catalysts leverage both the unique features of the CNT (high active-site accessibility, chemical stability, mechanical strength) and a strong ceria promotion effect. Given the relative simplicity of production, Ni-Ce-NT can be promising for large-scale CME applications, supporting global decarbonization efforts.

Cite: Derevschikov V.S. , Suknev A.P. , Sadovskaya E.M. , Tiurina A. , Yatsenko D.A. , Leonova A.A. , Gerasimov E.Y. , Ruvinskiy P.S. , Moseenkov S.I. , Kuznetsov V.L.
Synthesis and Characterization of Novel CO2 Methanation Catalysts Based on Ni and Carbon Nanotubes
Chemical Engineering Science. 2026. V.320. NPart B. 122515 :1-12. DOI: 10.1016/j.ces.2025.122515 Scopus

Dates:

Submitted:	Jul 16, 2025
Accepted:	Aug 26, 2025
Published online:	Aug 28, 2025
Published print:	Jan 15, 2026

Identifiers:

Scopus:

2-s2.0-105014756436

Citing: Пока нет цитирований

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