Enhanced electrocatalytic activity and stability of PdCo@Pt core–shell nanoparticles for oxygen reduction reaction
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The carbon-supported PdCo@Pt core–shell nanoparticles for an oxygen reduction reaction (ORR) were prepared via a two-step process at room temperature. The as-prepared PdCo@Pt/C with an average particle size of ~3.5 nm exhibited a well-defined nanostructure consisting of Pd-rich core and Pt shell formed by displacing Co core with Pt. Compared to pure Pt, PdCo@Pt/C showed a higher current density in the kinetic controlled region and more positive half-wave potential for the ORR. In a cycling stability test of the PdCo@Pt/C electrocatalyst, no remarkable activity loss was seen.
KeywordsCore–shell PdCo@Pt Electrocatalyst Oxygen reduction reaction
This work was supported by New & Renewable Energy R&D Program (2011301003007A) of the Ministry of Knowledge and Economy.
- 10.Zhou WP, Sasaki K, Su D, Zhu Y, Wang JX, Adzic RR (2010) Gram-scale-synthesized Pd2Co-supported Pt monolayer electrocatalysts for oxygen reduction reaction. J Phys Chem A 114:8950–8957Google Scholar
- 13.Liu L, Samjeske G, Nagamatsu S-I, Sekizawa O, Nagasawa K, Takao S, Imaizumi Y, Yamamoto T, Uruga T, Iwasawa Y (2012) Enhanced oxygen reduction reaction activity and characterization of Pt-Pd/C bimetallic fuel cell catalysts with Pt-enriched surfaces in acid media. J Phys Chem C 116:23453–23464CrossRefGoogle Scholar
- 19.Sarkar A, Murugan AV, Manthiram A (2010) Pt-encapsulated Pd–Co nanoalloy electrocatalysts for oxygen reduction reaction in fuel cells. J Phys Chem C 26:2894–2903Google Scholar