A Pt-deposited carbon nanotube (CNT) shows higher performance than a commercial Pt-deposited carbon black (CB) with reducing 60% Pt load per electrode area in polymer electrolyte fuel cells (PEFCs) below 500mA/cm 2. K2PtCl4 and H2PtCl 6·6(H2O) are used for the Pt deposition onto multi-walled CNTs (MWCNTs), which are produced by the catalytic decomposition of hydrocarbons. The electric power densities produced using the Pt/CNT electrodes are greater than that of the Pt/CB by a factor of two to four on the basis of the Pt load per power. CNTs are thus found to be a good support of Pt particles for PEFC electrodes. TEM images show 2-4-nm Pt nanoparticles dispersed on the CNT surfaces. These high performances are considered to be due to the efficient formation of the triple-phase boundaries of gas-electrode-electrolyte. The mechanisms of Pt deposition are discussed for these Pt-deposited CNTs.
|Number of pages||5|
|Publication status||Published - Jul 1 2004|
|Event||Environmental Catalysis and Eco-Materials - Beijing, China|
Duration: Oct 7 2003 → Oct 7 2003
All Science Journal Classification (ASJC) codes