期刊
JOURNAL OF POWER SOURCES
卷 195, 期 4, 页码 1046-1050出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2009.09.006
关键词
Pd-Pt alloy; Oxygen reduction reaction; Complexing-reduction; Electrocatalysis; Methanol tolerance
资金
- NSF of China [20673136, 20706056]
- National 863 Programs of China [2007AA05Z141, 2008AA05Z102]
- CAS
- U.S. NSF [CHE-0641523]
- New York State Office of Science, Technology
- Academic Research (NYSTAR)
- Direct For Education and Human Resources
- Division Of Human Resource Development [833180] Funding Source: National Science Foundation
Carbon-supported Pd-Pt bimetallic nanoparticles of different atomic ratios (Pd-Pt/C) have been prepared by a simple procedure involving the complexing of Pd and Pt species with sodium citrate followed by ethylene glycol reduction. As-prepared Pd-Pt alloy nanoparticles evidence a single-phase fcc disordered structure, and the degree of alloying is found to increase with Pd content. Both X-ray diffraction and transmission electron microscopy characterizations indicate that all the Pd-Pt/C catalysts possess a similar mean particle size of ca. 2.8 nm. The highest mass and specific activity of the oxygen reduction reaction (ORR) using the Pd-Pt/C catalysts are found with a Pd:Pt atomic ratio of 1:2. Moreover, all Pd-Pt alloy catalysts exhibit significantly enhanced methanol tolerance during the ORR than the Pt/C catalyst, ensuring a higher ORR performance while diminishing Pt utilization. (C) 2009 Elsevier B.V. All rights reserved.
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