At 09:34 PM 10/28/2002 -0800, Sean R. Lynch wrote:
For example, according to Dan's tests platinum only works well at high temperatures. I was hoping we could use something a little less expensive, though. Stainless steel maybe? :) Iron oxide is a catalyst.
Stainless steel doesn't form oxides unless seriously provoked -- better to go with a mild or carbon steel of convenient properties. However, it would be a sacrificial catalyst, as iron oxides are not tenacious and will be carried away at some rate best determined through experiment. It appears that most, if not all, transition metal oxides are at least somewhat catalytic. All of the catalysts for peroxide that I have heard tested or floated in any way are transition metals or their oxides. Anecdotal evidences (such as the requirement for 'burning in' a silver pack) indicates that it's the oxides that have the real catalytic action. I think the proper approach to catalyst development is to read through the tables and select those oxides that have otherwise convenient properties and test their activity and resistance to poisoning. The actual working catalyst should be a ceramic composed of the best catalysts found in the search.
-p
Mars or Bust!
www.marssociety.com
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