期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 509, 期 18, 页码 5617-5622出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.02.087
关键词
Fuel cell; CNT/SnO2 composite; PtRu alloy; Methanol oxidation
资金
- Ministry of Education, Science and technology [2009-0093823]
- Defense Acquisition Program
- Defense Nano Technology (Center), Korea
- National Research Foundation of Korea [2009-0093823] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
An electrocatalyst support comprising of carbon nanotube and tin oxide (CNT/SnO2) was prepared by an ethylene glycol mediated synthesis procedure and proposed as an improved catalyst support for direct methanol fuel cell. CNTs are covered by the porous SnO2 layer which is homogeneously distributed over CNT surface. PtRu alloy nanoparticles were deposited over this composite material by a hydrothermal synthesis method. The CNT/SnO2 composite and its supported PtRu catalyst (PtRu/SnO2/CNT) were characterized by X-ray diffraction, field emission scanning electron microscopy and transmission electron microscopy. The electrocatalytic activity of PtRu/SnO2/CNT catalyst for methanol oxidation has been studied by cyclic voltammetry, impedance spectroscopy and chronoamperometry. The results were compared with Pt/SnO2/CNT and PtRu/CNT catalysts synthesized by the same procedure. PtRu/SnO2/CNT catalyst shows an electrochemically active surface area of 81.84m(2) g(Pt)(-1) and a mass activity of 890mA mg(Pt)(-1). The presence of SnO2 layer over CNT can further improve the electrocatalytic activity of PtRu alloy nanoparticles for methanol oxidation. (C) 2011 Elsevier B.V. All rights reserved.
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