Development of Durable Platinum Nanocatalyst on Carbon Nanotubes for Proton Exchange Membrane Fuel Cells

作者：Lin J F^*; Adame A; Kannan A M

来源：Journal of the Electrochemical Society, 2010, 157(6): B846-B851.

DOI：10.1149/1.3367753

Platinum nanocatalyst on multiwalled carbon nanotubes (MWCNTs) functionalized with citric acid (CA) was synthesized by a two-phase approach to transfer PtCl(6)(2)- from aqueous to organic phase. Pt-thiol ligand-based Pt/MWCNTs were fabricated with the presence of dodecanethiol (DDT). A homogeneous distribution as well as a uniform particle size of Pt particle was achieved by optimizing the CA and DDT contents. Pt/MWCNTs were examined by a high resolution transmission electron microscope for particle size and distribution. The Pt/MWCNT-based electrodes were characterized by electrochemical impedance spectroscopy for cell resistance and cyclic voltammetry (CV) for durability evaluation using humidified H(2) and N(2) gases at 80 degrees C. The single-cell fuel cell performance with 0.2 (anode) and 0.4 mg (cathode) Pt cm(-2) evaluated using Nafion 212 electrolyte showed a power density of about 1520 mW cm(-2) with H(2) and O(2) gases. The electrochemically active surface area, as measured by CV between 0.1 and 1.2 V, showed no degradation up to 1500 cycles for Pt/MWCNTs, showing exceptional durability.

• 出版日期2010