Supported bimetallic catalysts of (Co + Pd)/SiO₂ system were studied in carbon monoxide hydrogenation. Comparative analysis showed that depending on precursor treatment mode the catalysts ranged in different rows of activity in CO conversion and selectivity to methane. Samples of best performance were obtained after pretreatment in Ar flow. Highly selective catalysts were synthesized by reduction at 450 °C determining low metal dispersion, high extent of alloying, and agglomeration. A low H_2,100C/CO_strong adsorbed gas ratio was ascribed to a great amount of bimetallic particles and concerned with a diminished number of sites for multiply bonded CO species. Metal dispersion was low due to large Co particles, which enhanced CO dissociation and hydrogenation to CH₄. In presence of bimetallic particles the reaction CO + 3H₂ = CH₄ + H₂O was hampered. A decreased H₂O formation influenced the WGS reaction. Catalyst samples activated at higher temperatures had better selectivity. During the process, formation of bidentate carbonate species was registered. It was supposed that palladium impeded creation of the latter species and following decomposition to CO₂. Active catalyst samples were prepared by reduction at 300 °C leading to higher unreduced cobalt quota and metal dispersion, and decreased alloy particle formation. Higher H_2,100C/CO_strong ratio values were assigned to pure Co and Pd particle segregation, i.e. availability of sites for multiply bonded CO species favoring a higher activity in CO dissociation and further hydrogenation. A higher amount of CO species on these samples was conducive to CH₄ formation, but also to CO₂ production. The latter reaction was facilitated by unreduced cobalt.

(Co + Pd)/SiO ₂体系负载型双金属催化剂在一氧化碳加氢中进行了研究。比较分析表明，根据前体处理模式，催化剂在 CO 转化和甲烷选择性方面的活性不同。在 Ar 流中预处理后获得性能最佳的样品。通过在 450 °C 下还原确定低金属分散、高合金化程度和团聚，合成了高选择性催化剂。低 H _2,100C /CO_强吸附气体比率归因于大量双金属颗粒，并与多键合 CO 物种的位点数量减少有关。由于 Co 颗粒较大，金属分散性较低，这增强了 CO 离解和氢化成 CH ₄。在双金属颗粒的存在下，CO + 3H ₂  = CH ₄  + H ₂ O 的反应受到阻碍。减少的 H ₂ O 形成影响 WGS 反应。在较高温度下活化的催化剂样品具有更好的选择性。在此过程中，记录了双齿碳酸盐物种的形成。据推测，钯阻碍了后一种物质的产生和分解成 CO ₂. 活性催化剂样品是通过在 300 °C 下还原制备的，导致更高的未还原钴配额和金属分散，并减少合金颗粒的形成。较高的H _2,100C /CO_强比值被指定为纯Co 和Pd 粒子分离，即多键合CO 物质的位置的可用性有利于CO 解离和进一步氢化中的较高活性。这些样品中较高数量的 CO 物种有利于 CH _{4 的}形成，但也有利于CO _{2 的}产生。未还原的钴促进了后一反应。