At 08:11 PM 10/29/2002 -0800, Donald Qualls wrote:
Say, has anyone tested copper or bronze as a high temperature catalyst? Melting point significantly higher than silver, 1083 C for pure copper; bronzes can be had with either higher or lower melting points. The high corrosion resistance of these metals suggests a tenacious oxide coating, and copper's reactivity is similar to that of silver in many ways -- but it costs about 1/10 as much.
Copper oxide (that green patina on weathered copper) is a tenacious oxide. Not sure which one tho -- there are two oxides listed in the tables plus a peroxide. Copper would be ideal, since it's relatively inexpensive and easy to work with. It is possible that since copper oxidizes less readily than silver in air, it displays much less catalytic activity as a pure metal and that intentional surface oxidization would raise its activity into the acceptable band. Worth a test, and it's easy given the ready availability of copper.
-p
Mars or Bust!
www.marssociety.com
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