期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 565, 期 -, 页码 120-126出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.02.170
关键词
Nanoporous metals; Dealloying; Catalyst; Methanol oxidation; Fuel cell
资金
- National Natural Science Foundation of China [51201113, 51171125]
- National Basic Research Program of China (973) [2012CB932800]
- 51st China Postdoctoral Science Foundation [2012M510781]
- Taiyuan University of Technology Talents Fund [tyut-rc201115a]
Nanoporous PdAu catalyst (NP-PdAu) can be fabricated by chemical dealloying ternary AlPdAu alloy in the alkaline solution. Electrochemical measurements demonstrate that the NP-PdAu exhibits greatly enhanced catalytic activity and long-term stability toward methanol electro-oxidation. The as-revealed specific activity and mass activity can attain to 1.30 mA cm(-2) and 866.50 mA mg(-1) (Pd), respectively, which is significantly higher than that of monometallic NP-Pd, NP-Au and widely-reported Pd or Pd-based nanoparticle catalysts. Moreover, methanol oxidation reaction on the NP-PdAu electrode is diffusion-controlled and represents a good linear correlation with methanol concentration. The results indicate that NP-PdAu is attractive as a promising electrocatalyst of alkali-type direct methanol fuel cells (DMFCs). (C) 2013 Elsevier B.V. All rights reserved.
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