Strong Stabilization of Co Nanoparticles by CeO_2-x Clusters in Inverse CeO_x/Co Catalysts for Enhanced CO₂ Methanation.

ABSTRACT: Inverse catalysts, where metal oxide species are dispersed over metallic nanoparticles, represent a promising class of materials for accelerating various chemical reactions. However, stabilizing metal nanoparticles with a small amount of oxide clusters remains a significant challenge, as the metallic phase tends to sinter under reaction conditions due to insufficient immobilization. In this study, flame spray pyrolysis is employed to synthesize uniformly sized inverse CeO_x/Co catalysts for CO₂ methanation (Sabatier reaction). It is found that small, highly reducible CeO_2-x clusters effectively stabilize metallic cobalt nanoparticles, thereby preventing sintering even during hydrogen reduction at 500 °C and during CO₂ hydrogenation. Detailed opera

SUBMITTER: Gao Y 

PROVIDER: S-EPMC12783866 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature