Résumé
The design of Pt-based nanoarchitectures with controllable compositions and morphologies is necessary to enhance their electrocatalytic activity. Herein, we report a rational design and synthesis of anisotropic mesoporous Pt@Pt-skin Pt3Ni core-shell framework nanowires for high-efficient electrocatalysis. The catalyst has a uniform core-shell structure with an ultrathin atomic-jagged Pt nanowire core and a mesoporous Pt-skin Pt3Ni framework shell, possessing high electrocatalytic activity, stability and Pt utilisation efficiency. For the oxygen reduction reaction, the anisotropic mesoporous Pt@Pt-skin Pt3Ni core-shell framework nanowires demonstrated exceptional mass and specific activities of 6.69 A/mgpt and 8.42 mA/cm2 (at 0.9 V versus reversible hydrogen electrode), and the catalyst exhibited high stability with negligible activity decay after 50,000 cycles. The mesoporous Pt@Pt-skin Pt3Ni core-shell framework nanowire configuration combines the advantages of three-dimensional open mesopore molecular accessibility and compressive Pt-skin surface strains, which results in more catalytically active sites and weakened chemisorption of oxygenated species, thus boosting its catalytic activity and stability towards electrocatalysis.
langue originale | Anglais |
---|---|
Numéro d'article | 1518 |
journal | Nature Communications |
Volume | 14 |
Numéro de publication | 1 |
Les DOIs | |
Etat de la publication | Publié - déc. 2023 |
Empreinte digitale
Examiner les sujets de recherche de « Mesoporous Pt@Pt-skin Pt3Ni core-shell framework nanowire electrocatalyst for efficient oxygen reduction ». Ensemble, ils forment une empreinte digitale unique.Équipement
-
Physico-chimie et caractérisation (PC2)
Johan Wouters (!!Manager) & Carmela Aprile (!!Manager)
Plateforme technologique Caracterisation physico-chimiquesEquipement/installations: Plateforme technolgique