Novel Materials for Power Systems. Part 1. Schizophrenic Catalysts
Annual technical rept. 1 Jun 1973-31 May 1974
PURDUE UNIV LAFAYETTE IN SCHOOL OF ELECTRICAL ENGINEERING
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The oxidation of carbon monoxide and reduction of oxides of nitrogen over chromia catalysts supported on silica is currently under study. One might expect that if two otherwise identical catalysts were prepared with varied dispersions chromium content being the same, that the reactivity would be different since the active sites, i.e., various stable surface oxidation states, may differ both in number and type. To test this simple hypothesis, a series of catalysts were prepared series A by chromic acid impregnation and series B by chromium nitrate-oxalic acid complexing. Two series of catalysts with varied amounts of chromium were prepared to insure the existence of a region where the Cr of both samples overlapped and where the catalyst activity as a function of Cr could be examined.
- Physical Chemistry