| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a nanoporous tungsten carbide catalyst that can be used as an electrode of a fuel cell, and a preparation method thereof. <P>SOLUTION: Provided are the nanoporous tungsten carbide catalyst, which includes tungsten carbide crystalline particles and has nanopores of a mean pore diameter ranging from 2 nm to 5 nm and a nanopore volume of 0.08 to 0.25 cm<SP>3</SP>per gram of the catalyst, the preparation method thereof, an electrode and a fuel cell, such as a direct methanol fuel cell and a polymer electrolyte membrane fuel cell, to which the nanoporous tungsten carbide catalyst is applied. The nanoporous tungsten carbide catalyst has high electrochemical activity and enhanced resistance to poisoning by carbon monoxide. This catalyst can keep high activity even when used as the electrode of the fuel cell for a long period of time. Since this catalyst has a wide surface area, a metallic active component can be dispersed suitably in this catalyst and consequently a metallic active component-supported catalyst can exhibit higher catalytic activity even when the metallic active component of the amount smaller than that of the conventional noble metal catalyst is supported. The electrode and the fuel cell employing this catalyst can be manufactured at lower costs, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
