期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 368, 期 -, 页码 413-419出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2011.10.080
关键词
LBL assembly; Polyoxometalates; PAMAM; Pt micro-nano clusters; Methanol oxidation; Electrocatalysis
资金
- National Natural Science Foundation of China [21171037, 21051003]
- Natural Science Foundation of Fujian Province [2011J0101]
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. (C) 2011 Elsevier Inc. All rights reserved.
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