Mechanism of formation of Co-Ru nanoalloys: the key role of Ru on the reduction pathway of Co - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue (Data Paper) Physical Chemistry Chemical Physics Année : 2023

Mechanism of formation of Co-Ru nanoalloys: the key role of Ru on the reduction pathway of Co

Résumé

The chemical synthesis of alloy nanoparticles requires adequate conditions to obtain coreduction instead of separate reduction of the two metal cations. The mechanism of formation of bimetallic cobalt-ruthenium nanoalloys by reducing the metal salts in an alcohol medium was explored to draw general rules to extrapolate to other systems. The relative kinetics of reduction of both metal cations were studied by UV-visible and in situ Quick-X-ray absorption spectroscopies as well as H2 evolution. The addition of Co(II) ions does not influence the reduction kinetics of Ru(III) but adding Ru(III) to a Co(II) solution promotes the reduction of cobalt cations. Indeed, while CoO is formed when reaching the boiling temperature of the solvent for the monometallic system, a direct reduction of Co is observed at this temperature without formation of the oxide for the bimetallic one. The co-reduction of the metal cations results in the formation of bimetallic nanoplatelets, the size of which can be tuned by changing the Ru content.

Domaines

Matériaux
Fichier principal
Vignette du fichier
ArticleCoRuMeca_230531_PCCP_vf.pdf (871.62 Ko) Télécharger le fichier
ArticleCoRuMecaSM_PCCP_vf.pdf (1.66 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04299971 , version 1 (22-11-2023)

Identifiants

Citer

Brandon Azeredo, Ben Tayssir, Ning Huang, Sophie Nowak, Jennifer Peron, et al.. Mechanism of formation of Co-Ru nanoalloys: the key role of Ru on the reduction pathway of Co. Physical Chemistry Chemical Physics, 2023, 25 (33), pp.22523. ⟨10.1039/D3CP02522E⟩. ⟨hal-04299971⟩
31 Consultations
41 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More