Okay! I finally have some updated information on Manganese Dioxide and H2O2/Hydrogen Peroxide. It (appears, I haven't DEEPLY researched it) that everyone is correct in that the Manganese Dioxide medias are fine with H2O2/Peroxide (well, obviously you guys already knew this with your experiences, but maybe this is sort of a theoretical confirmation?). The issue seems to be that the Manganese Dioxide medias act as a catalyst, helping to more quickly break down the H2O2 into oxygen (O2) and water (H2O). The Manganese Dioxide (MnO2) itself seems to be untouched - although the reaction is noted as being "slightly exothermic" in this video; however, I guess not enough to cause problems with excessive heat or otherwise when used with Katalox/Filox/MangOx/Pyrolox, etc. based on everyone's experiences. I'm basing all of that on these videos:
http://depts.washington.edu/chem/fa...ositionofH2O2withMnO2-UWDept.ofChemistry.html (I'm guessing all of that bubbling is water and oxygen being "created" / released from the H2O2, although it looks scary at first - as in "What is happening to the MnO2?!!!") And, if we can trust Yahoo! answers (this guy really does seem to know what he is talking about), it seems to corroborate it:
https://answers.yahoo.com/question/index?qid=20081108043948AAQzf8X and here is his (pisgahchemist's) answer:
"MnO2 is a catalyst and as such it is involved in the reaction, but is not consumed in the reaction.
Catalysts work in two major ways. In one, the catalyst is a reactant in an early step in the mechanism and a product in a latter step, so that it appears that the catalyst is not consumed in the reaction.
In the second, the catalyst provides a surface on which the reaction can occur which makes the reaction more favorable.
In either case, a catalyst provides an alternate reaction pathway with a lower activation energy."
So, basically, it appears that MnO2 (Manganese Dioxide) is just a catalyst in the reaction, but the MnO2 itself is left untouched?