Functional multi-walled carbon nanotube/polysiloxane composite films as supports of PtNi alloy nanoparticles for methanol electro-oxidation |
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Authors: | Zhi-Cai Wang Hu-Lin Li |
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Affiliation: | a College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China b Jinchuan Ni & Co Research and Engineering Institute, Jinchuan Group Co. Ltd, Lanzhou, PR China |
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Abstract: | We demonstrate the use of molecular monolayers to enhance the nucleation of electrocatalytically active PtNi alloy nanoparticles onto the multi-walled carbon nanotubes (MWCNTs). After the siloxane was polymerized on the nanotube surfaces, the carbon nanotubes were embedded within the polysiloxane shell with a hydrophilic amino group situated outside. Subsequent deposition of PtNi nanoparticles led to high density of 3-10 nm diameter PtNi alloy nanoparticles uniformly deposited along the length of the carbon nanotubes. The presence of MWCNTs and PtNi in the composite films was confirmed by transmission electron microscopy (TEM), X-ray diffraction (XRD) and energy dispersion X-ray spectra analysis (EDS). The electrocatalytic activity of the PtNi-modified MWCNT/polysiloxane (PtNi/Si-MWCNT) composite electrode for electro-oxidation of methanol was investigated by cyclic voltammetry (CV), and excellent electrocatalytic activity can be observed. |
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Keywords: | Multi-walled carbon nanotubes Polysiloxane Composite film PtNi alloy Methanol electro-oxidation |
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