Co-Mo bimetallic nanoparticles (NPs) with various compositions were prepared on a CeO₂ support (Co-Mo/CeO₂) by sodium naphthalenide driven reduction. The Co-Mo/CeO₂ catalyst exhibits much higher activity for ammonia synthesis than monometallic catalysts such as Co/CeO₂ and Mo/CeO₂, and the optimum activity is obtained at Co:Mo = 4:6. X-ray absorption fine structure (XAFS) analyses reveal that Co₃Mo₃N NPs are formed after ammonia synthesis reaction. Nitrogen temperature programmed desorption (N₂-TPD) measurements indicate that the Co-Mo/CeO₂ catalyst possesses a large number of nitrogen adsorption sites with an intermediate nitrogen adsorption energy between that of Co and Mo. Furthermore, nitrogen vacancy sites, which are active sites for N₂ dissociation, are more easily formed on the Co-Mo/CeO₂ catalyst than on bulk-type Co₃Mo₃N. As a consequence, the turnover frequency of the Co-Mo/CeO₂ catalyst is much higher than that of bulk-type Co₃Mo₃N and is comparable to that of the efficient Ru/CeO₂ catalyst.

通过萘钠驱动的还原，在CeO ₂载体（Co-Mo / CeO ₂）上制备了具有各种组成的Co-Mo双金属纳米颗粒（NPs）。与单金属催化剂如Co / CeO ₂和Mo / CeO _2相比，Co-Mo / CeO ₂催化剂显示出更高的氨合成活性，并且在Co：Mo = 4：6时获得了最佳活性。X射线吸收精细结构（XAFS）分析表明，氨合成反应后形成了Co ₃ Mo ₃ N NPs。氮气程序升温脱附（N ₂ -TPD）测量表明Co-Mo / CeO ₂催化剂具有大量的氮吸附位，其氮吸附能介于Co和Mo之间。此外，作为N ₂离解的活性位的氮空位更容易在Co-Mo / CeO ₂催化剂上形成。比批量型Co ₃沫₃ N.因此，在Co-Mo系/铈的周转频率₂催化剂比的批量型Co高得多的₃沫₃ N和比得上有效的Ru / CeO ₂催化剂。