One particle at one cell: Highly monodispersed PtPd bimetallic nanoparticles for enhanced oxygen reduction reaction

Jie Ying, Xiao Yu Yang, Zhi Yi Hu, Shi Chun Mu, Christoph Janiak, Wei Geng, Mu Pan, Xiaoxing Ke, Gustaaf Van Tendeloo, Bao Lian Su

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Résumé

Highly monodispersed platinum-based nanoalloys are the best-known catalysts for the oxygen reduction reaction. Although certainly promising, the durability and stability are among the main requirements for commercializing fuel cell electrocatalysts in practical applications. Herein, we synthesize highly stable, durable and catalytic active monodispersed PtPd nanoparticles encapsulated in a unique one particle at one cell structure by adjusting the viscosity of solvents using mesocellular foam. PtPd nanoparticles in mesocellular carbon foam exhibit an excellent electrocatalytic activity (over 4 times mass and specific activities than the commercial Pt/C catalyst). Most importantly, this nanocatalyst shows no obvious change of structure and only a 29.5% loss in electrochemically active surface area after 5000 potential sweeps between 0.6 and 1.1. V versus reversible hydrogen electrode cycles.

langue originaleAnglais
Pages (de - à)214-222
Nombre de pages9
journalNano Energy
Volume8
Les DOIs
Etat de la publicationPublié - 1 janv. 2014

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