Layer-by-Layer Assembled Multilayers of Polyethylenimine-Stabilized Platinum Nanoparticles and PEDOT:PSS as Anodes for the Methanol Oxidation Reaction

作者：Knowles Kyler R; Hanson Colin C; Fogel April L; Warhol Brian; Rider David A^*

来源：ACS Applied Materials & Interfaces, 2012, 4(7): 3575-3583.

DOI：10.1021/am300639z

• layer-by-layer
• multilayer
• electrolyte
• platinum nanoparticle
• polyethylenimine
• poly(3,4-ethylenedioxythiophene):poly(p-styrenesulfonate)
• PEDOT:PSS
• fuel cell
• methanol oxidation
• electrocatalysis

Polyethylenimine-capped platinum nanopartides (PEI-capped Pt NPs) are synthesized by photoreduction and qualified as a component for electrostatic layer-by-layer assembly and subsequent electrocatalysis. The PEI-capped Pt NPs are characterized for size and charge using scanning force microscopy, transmission electron microscopy, dynamic light scattering and zetapotential. Well-defined multilayers are produced via thin film electrostatic assembly of PEI-capped Pt NPs with the conducting polymer: poly(3,4-ethylenedioxythiophene):poly(p-styrenesulfonate) [(PEDOT:PSS)Na--(+)]. The composite thin films are subsequently characterized by ultraviolet visible spectroscopy, scanning force microscopy, inductively coupled plasma mass spectroscopy and.. thermogravimetric analysis. The layer-by-layer deposition process was found to proceed in a controlled manner which permits the fabrication of stable and uniform multilayer thin films. [PEI-capped Pt NPs/(PEDOT:PSS)] multilayers were found to be an active catalyst coating for the oxidation of methanol and a 20 bilayer film proceeds with a stable level of catalyst activity for over 1000 oxidation cycles.

• 出版日期2012-7