Pd nanoparticles supported on HPMo-PDDA-MWCNT and their activity for formic acid oxidation reaction of fuel cells

被引：93
作者：
Cui, Zhiming [1 ,2 ]
Kulesza, Pawel J. [3 ]
Li, Chang Ming [2 ]
Xing, Wei [4 ]
Jiang, San Ping [1 ]
机构：
[1] Curtin Univ, Fuels & Energy Technol Inst, Perth, WA 6845, Australia
[2] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 639798, Singapore
[3] Univ Warsaw, Dept Chem, PL-02093 Warsaw, Poland
[4] Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Jilin, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 14期
关键词：
Direct formic acid fuel cell; Palladium catalysts; Phosphomolybdic acid; PDDA; Carbon nanotubes; MULTIWALLED CARBON NANOTUBES; ELECTROCHEMICAL CHARACTERIZATION; PALLADIUM NANOPARTICLES; PLATINUM NANOPARTICLES; SILICOTUNGSTIC ACID; NETWORK FILMS; METHANOL; CATALYSTS; ELECTROOXIDATION; NANOCATALYSTS;
D O I：
10.1016/j.ijhydene.2011.04.072
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel Pd electrocatalyst is developed by self-assembly of Pd nanopartilces on phosphomolybdic acid (HPMo)-poly(diallyldimethylammonium chloride) (PDDA)-functionalized multiwalled carbon nanotubes supports (Pd/HPMo-PDDA-MWCNTs). The as-synthesized Pd/HPMo-PDDA-MWCNTs were characterized by TEM, EDS mapping, Raman spectra, X-ray photoelectron spectroscopy, electrochmeical CO stripping and cyclic voltammetry techniques. Pd nnaoparticles deposited on HPMo-PDDA-MWCNTs are in the range of 3.1 nm with uniform distributon. Pd/HPMo-PDDA-MWCNT catalysts have lower over-potential for COad oxidation manifested as lower peak and onset potentials as compared to acid-treated MWCNTs supported Pd (Pd/AO-MWCNTs) and carbon supported Pd catalysts (Pd/C). Pd/HPMo-PDDA-MWCNTs catalysts also exhibit a much higher electrocatalytic activity and stability for formic acid oxidation reaction as compared to that on Pd/AO-MWCNTs and Pd/C. The high electrocatalytic activities of Pd/HPMo-PDDA-MWCNTs catalysts are most likely related to highly dispersed and fine Pd nanoparticles as well as synergistic effects between Pd and HPMo immobilized on PDDA-functionalized MWCNTs. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：8508 / 8517
页数：10
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