4.8 Article

Simple preparation of Pd-Pt nanoalloy catalysts for methanol-tolerant oxygen reduction

Journal

JOURNAL OF POWER SOURCES
Volume 195, Issue 4, Pages 1046-1050

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2009.09.006

Keywords

Pd-Pt alloy; Oxygen reduction reaction; Complexing-reduction; Electrocatalysis; Methanol tolerance

Funding

  1. NSF of China [20673136, 20706056]
  2. National 863 Programs of China [2007AA05Z141, 2008AA05Z102]
  3. CAS
  4. U.S. NSF [CHE-0641523]
  5. New York State Office of Science, Technology
  6. Academic Research (NYSTAR)
  7. Direct For Education and Human Resources
  8. Division Of Human Resource Development [833180] Funding Source: National Science Foundation

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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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