Abstract
Catalytic properties of supported Fe, Co, and Ni bimetallic catalysts were examined with XPS, XRD, and IR. From the XPS and catalyst's XRD measurements, it become evident that the reducibility of iron or cobalt was enhanced by alloying with nickel. This reducibility enhancement suggests that hydrogen is easily activated on the catalyst's surface. Infrared spectra of NO adsorbed on bimetallic catalysts depended on the metal composition. The conversion of CO was related with the absorbance of bent-type NO. Adsorption sites of bent-type were expected to be active sites in CO hydrogenation because of its high electron density. The alloying metals increased the absorbance of bent-type resulting in high CO conversion and high selectivity to higher hydrocarbons.
