期刊
ELECTROCHIMICA ACTA
卷 99, 期 -, 页码 124-132出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.03.081
关键词
PtRu nanoparticles; Multi-walled carbon nanotubes (MWCNTs); Poly(ethyleneimine) functionalization; Direct methanol fuel cells (DMFCs)
资金
- Australia Research Council, Australia [ARC DP120102325, DP120104932]
A highly efficient and CO tolerant PtRu electrocatalysts supported on amino-rich, cationic poly(ethyleneimine) polyelectrolyte functionalized multi-walled carbon nanotubes (PtRu/PEI-MWCNTs) has been developed. The catalysts were characterized by thermogravimetric analysis, Raman spectroscopy, cyclic voltammograms, CO stripping, chronoamperometry, transmission electron microscopy (TEM) and X-ray diffraction (XRD). The PtRu particles with average size similar to 2.5 nm are well dispersed on PEI-MWCNTs. The peak current for the methanol oxidation reaction on 40% PtRu/PEI-MWCNTs is 636 mA mg(Pt)(-1), 5.7 times higher than 112 mA mg(Pt)(-1) measured on the 40% PtRu supported on acid treated MWCNTs (PtRu/AO-MWCNTs) under identical conditions. PtRu/PEI-MWCNTs catalysts exhibit a superior electrocatalytic activity and stability for the methanol oxidation reaction due to its high tolerance toward CO poisoning as compared with PtRu/AO-MWCNTs for direct methanol fuel cells. (C) 2013 Elsevier Ltd. All rights reserved.
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