MOSSBAUER SPECTROSCOPY OF SUPPORTED BIMETALLIC CATALYSTS:

and Pt) with FeM = 1:5 after treatments such as reduction, exposure to CO and passivation in air are described and compared with previous results obtained on i:i FeM/SiO 2 catalysts. A l loy ing of meta ls p rov ides a powerfu l means to opt imize the per formance of cata lysts /i/. As cata lysts should pre ferab ly have a large f ract ion of sur face atoms, smal l-par t i c le a l loys s tab i l i zed by an inert support such as SiO 2 are of great p ract i ca l interest