Abstract
The {[PMo12O40]3−/PAMAM}n multilayer films are prepared by LBL electrostatic assembly technique, and their uniform and homogeneous traits have been verified by cyclic voltammetry. The {[PMo12O40]3−/PAMAM}n multilayer films with PAMAM as the outmost layer, having an open structure and exhibiting good penetrability for the solvent molecules at low pH, are used as matrices for electro-deposition of Pt micro-nano clusters in situ. X-ray photoelectron spectroscopy (XPS) analysis and field emission scanning electron microscope (FE-SEM) characterization show that the unique Pt micro-nano clusters with flower-like structure have been immobilized on the surface of {[PMo12O40]3−/PAMAM}n multilayer films. The morphologies of Pt micro-nano clusters are influenced by electro-deposition conditions such as deposition potential, deposition time, and the number of layers of {[PMo12O40]3−/PAMAM}n multilayer films. Pt-clusters-{PMo12/PAMAM}3 composite films demonstrate good electrocatalytic activities regarding methanol oxidation and improved tolerance of CO.
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