期刊
CHEMISTRY OF MATERIALS
卷 23, 期 21, 页码 4694-4700出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm2012044
关键词
gold; palladium; spontaneous deposition; bimetallic nanoparticle; core-shell; oxygen reduction reaction
资金
- Ministry of Education, Science and Technology (MEST) of the Republic of Korea
- National Research Foundation of Korea (NRF)
- MEST [2011-0015619]
- National Research Foundation of Korea [2011-0015619] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This paper reports the simple synthesis and characterization of carbon-supported Pd layer-coated Au nanoparticles (AuPd/C). A series of AuPd/C with various Pd/Au weight percentage ratios were prepared by the spontaneous deposition of a Pd shell on a Au nanoparticle core using different Pd precursor concentrations (0.5, 5, 10, 20 mM PdCl2). Au nanospheres encapsulated by the porous Pd shells are confirmed by transmission electron microscopy (TEM), UV-vis absorption spectroscopy, and scanning TEM. The catalytic activity of the AuPd/C for the oxygen reduction reaction (ORR) was investigated by rotating disk electrode voltammetry in 0.5 M H2SO4. In particular, a AuPd/C with a Pd/Au ratio of 0.61 shows superior ORR activity along with satisfactory stability and methanol tolerance under acidic conditions.
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