Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 4, Issue 8, Pages 4208-4214Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am300923s
Keywords
monodisperse nanoparticles; Pd-Ni alloy; ethanol oxidation; fuel cell
Funding
- Basic Science Research Programs [2010-0029149]
- EPB Center [2008-0062042]
- PRC Program [2009-0082813]
- National Research Foundation (NRF) [2009-0082640]
- Korean government (MEST)
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Highly monodisperse 5 nm Pd-Ni alloy. nanoparticles (NPs) were prepared by the reduction of Pd(acac)(2)/Ni(acac)(2) mixtures with tert-butylamine-borane complex (TBAB) in the presence of oleic acid (OA) and oleylamine (OAm). Employing TBAB as an effective reductant and OA/OAm combination as an effective stabilizing agent is crucial to the formation of monodisperse Pd-Ni NPs. Experimental results collectively verify that the Pd-Ni alloy NPs form through the sequential nucleation-interdiffusion process and the simultaneous reduction of both metal precursors by the one-pot protocol is the key to the formation of homogeneous NPs. The Pd-Ni NPs were well-dispersed on carbon supports and chemically dealloyed after acetic acid washing through the selective dissolution of the less noble Ni component. The Pd-Ni NP catalysts exhibited much higher electrocatalytic activity and stability for ethanol oxidation than those of a commercial Pd/C catalyst.
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