Carbon Nanotubes Supported Bimetallic Palladium-Gold Electrocatalysts for Direct Formic Acid Fuel Cell
|Cheng-Han Chen 1, Wei-Jen Liou 1, Wei-Syuan Lin 1, Hong-Ming Lin 1, She-huang Wu 1, Leszek Stobinski 2,3, Andrzej Borodzinski 2, Piotr Kedzierzawski 2|
1. Tatung University, Department of Material Engineering (TTU), 40 ChungShan North Road, 3rd Section Taipei 104, R.O.C., Taipei 10461, Taiwan
Preparation and characterization of palladium and palladium-gold nanoparticles on multiwall carbon nanotubes (MWCNTs) electrocatalysts towards formic acid electrooxidation are described. Palladium and gold have been deposited on MWCNTs by pol-yol method using PdCl2 and HAuCl4．4H2O as precursors. The catalysts synthesized after annealing in H2(5%)/Ar mixture gas are characterized by XRD, TEM, EDS and cyclic voltammetry. According to XRD analysis, annealed Pd-Au/MWCNTs catalyst reveals solid solution structure of Pd-Au nanoparticles. The images of TEM show that: (i) Pd and Pd-Au nanoparticles particle sizes are in the ranges of 5-10 nm and 20-40 nm, respectively, (ii) they are both distributed uniformly on MWCNTs, and (iii) Pd-Au/MWCNTs have core/shell (Pd/Pd-Au) structure. Pd-Au/MWCNTs shows significantly improved catalytic activity and the stability at room temperature for formic acid electrooxidation. The specific catalysis of palladium in Pd-Au/MWCNTs is found to be more than two times higher than that of Pd/MWCNTs catalyst.
Presentation: Invited oral at E-MRS Fall Meeting 2009, Symposium H, by Hong-Ming Lin
See On-line Journal of E-MRS Fall Meeting 2009
Submitted: 2009-06-02 07:54 Revised: 2009-06-07 00:48
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