โ Scribed by C. Mirodatos; J.A. Dalmon; E.D. Garbowski; D. Barthomeuf
No coin nor oath required. For personal study only.
The reduction of nickel loaded mordenite and silica catalysts has been studied'by magnetic, volumetric and spectroscopic methods. Data related to changes in the nickel phase occurring during oxygen and hydrogen heat treatments are presented and discussed. The results indicate that the reduction of ionic nickel to metal is inhibited when the nickel coordination to surrounding oxygen atoms increases. The observed final distributions of nickel particles (metal and/or oxide) are strongly support-dependent. They are tentatively explained on the basis of the mobility of Ni(ll) species during activation.
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