期刊
MATERIALS RESEARCH BULLETIN
卷 46, 期 12, 页码 2433-2440出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2011.08.025
关键词
Metals; Nanostructures; Composites; Electron microscopy
资金
- Manpower Development Program for Energy Resources
- Ministry of Knowledge and Economy, Republic of Korea
- National Research Foundation of Korea
- Ministry of Education, Science and Technology [2010-0024794]
- National Research Foundation of Korea [2010-0024794] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Composite materials with highly dispersed platinum (Pt) nanoparticles on multiwalled carbon nanotubes (MWCNTs), functionalized with polyethyleneimine (PEI) by a noncovalent method were prepared. The PEI-functionalization provided high density homogeneous functional groups on the MWCNTs' sidewalls for binding Pt nanoparticles. Cationic PEI leads to homogeneous dispersion in solutions such as water and organic solvents. The effects of a reducing agent on the Pt nanoparticles that form on the surfaces of the MWCNT were studied by varying the molar ratio of NaOH to H2PtCl6. These composite materials were characterized with transmission electron micrograph (TEM), X-ray diffractometer (XRD) and X-ray photoelectron spectroscopy (XPS). The Pt/PEI-MWCNT catalyst exhibits excellent electrocatalytic activity and compared with Pt/PVP-MWCNT catalysts obtained with polyvinylpyrrolidone (PVP). Finally, the cyclic voltammogram of methanol electrooxidation for Pt/PEI-MWCNT shows better tolerance to CO and methanol oxidation to CO2 than of Pt/PVP-MWCNT. (C) 2011 Elsevier Ltd. All rights reserved.
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