Use of high surface area mixed metal oxides of manganese and calcium in electrochemical processes

摘要

Mixed metal oxides of the formula CaMn3O6, CaMn4O8 and CaMn7O12 are disclosed. They are useful in electrochemical processes. CaMn3O6 is a mixed valence composition whose formula may be written as Ca[Mn23+Mn4+]O6. The compound is stable in H2 to about 400 DEG C. and in oxygen to approximately 925 DEG C. CaMn4O8 is also a mixed valence composition whose formula may be written Ca[Mn23+Mn24+]O8. This compound is stable in H2 to about 250 DEG C. and in O2 to about 900 DEG C. CaMn7O12 is a mixed valence composition whose formula may be written as Ca[Mn4+Mn63+]O12. The compound is stable in H2 to about 500 DEG C. and in oxygen to approximately 950 DEG C.