| 摘要 |
A method for depositing a nano-structured catalyst coating onto a porous electrode substrate from a precursor catalyst material selected from the group consisting of a metal, metal alloy, metal compound, and ceramic material. The method includes the steps of (a) providing an ionized arc nozzle comprising a consumable electrode, a non-consumable electrode, and a working gas flow to form an ionized arc between the two electrodes, wherein the consumable electrode provides the precursor catalyst material vaporizable therefrom by the ionized arc; (b) operating the arc nozzle to heat and at least partially vaporize the precursor catalyst material for providing a stream of nanometer-sized vapor clusters of the precursor catalyst material into a chamber in which the porous electrode substrate is disposed; and (c) introducing a stream of a carrier gas into the chamber to impinge upon the stream of precursor vapor clusters to produce depositable nano clusters which are carried by the carrier gas to deposit onto a first side of the porous electrode substrate for forming the nano-structured catalyst coating. Such a catalyst-coated electrode is particularly useful for fuel cell applications.
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