Lanthanum, cerium, and yttrium were added as a second metal on the WO₃/SiO₂ catalysts by the incipient wetness impregnation method with the atomic ratio between the second metal and tungsten 0.083 in order to improve the catalytic performances of W-based catalysts in the metathesis of ethylene and 2-butene. As revealed by various characterization results from X-ray diffraction, nitrogen physisorption, inductively coupled plasma optical emission spectrometry, ion-exchange titration, FT-Raman, ammonia temperature programmed desorption (NH₃-TPD), and reactant-TPD, the dispersion of tungsten and adsorption properties were significantly improved by adding of the second metals, especially the adsorption of the mixed cis/trans-2-butene isomers. Hence, their catalytic performances were higher than the non-modified one when mixed cis/trans-2 butene isomers were used as the feeds. In addition, the presence of La as the second metal could also reduce coke formation on the catalysts probably by decreasing the ensemble site effect.

镧，铈，钇作为初始金属，通过初期湿润浸渍法在第二金属与钨之间的原子比为0.083的条件下添加到WO ₃ / SiO ₂催化剂上，以提高W型催化剂在W ₃ / SiO ₂催化剂上的催化性能。乙烯和2-丁烯的复分解。如X射线衍射，氮物理吸附，电感耦合等离子体发射光谱法，离子交换滴定，FT-拉曼光谱，氨程序升温脱附（NH ₃ -TPD）和反应物-TPD的各种表征结果所揭示的那样，通过添加第二种金属，钨和吸附性能得到了显着改善，尤其是混合顺式/反式的吸附-2-丁烯异构体。因此，当使用混合的顺式/反式-2丁烯异构体作为原料时，它们的催化性能高于未改性的催化剂。此外，La作为第二种金属的存在还可能通过降低整体位点效应来减少催化剂上焦炭的形成。