Electrostatic self-assembly of platinum nanochains on carbon nanotubes: A highly active electrocatalyst for the oxygen reduction reaction
By Yu Chen, Jiangfeng Xu, Xinyu Liu, Yawen Tang,Tianhong Lu
Published in Organic Electronics
NULL
2014
Abstract
We design and synthesize a multiwalled carbon nanotubes (MWCNTs) supported platinum nanochains (Pt-NCs) catalyst (Pt-NCs/MWCNTs) through the electrostatic self-assembly between phosphonate functionalized Pt-NCs and polyallylamine (PAH) functionalized MWCNTs. The grown mechanism, morphology, structure, and composition of the Pt-NCs are investigated by ultraviolet -visible (UV -vis), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and zeta potential analysis. XPS and elemental maps measurements confirm the successful immobilization of PAH on the MWCNTs surface. The resultant Pt-NCs/MWCNTs catalyst exhibits better electrocatalytic activity for the oxygen reduction reaction (ORR) than the commercial Pt/C catalyst due to the unique structure and low hydroxyl surface coverage.
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