Ni2P负载量对Ni2P/Ce-Al2O3催化剂结构及萘加氢性能的影响

采用程序升温还原法制备了一系列Ni₂P/Ce-Al₂O₃催化剂，考察了制备过程中Ni₂P负载量对催化剂结构及萘加氢饱和性能的影响。结果表明，Ni₂P负载量可调控活性组分Ni₂P与载体Ce-Al₂O₃之间的相互作用，进而调变催化剂的比表面积、Ni₂P粒径及催化剂活性位点数量。当Ni₂P负载量（质量分数）为17%时，催化剂具有较大的比表面积（40 m²/g）、较小的Ni₂P粒径（26.3 nm）和最多的活性位点数量（26.7 μmol/g）；同时，该催化剂萘转化率为95%，十氢萘选择性为76%，且活性稳定性良好，这主要归因于催化剂大的比表面积和高的活性位点数量为反应提供了更多的场所。

Effect of Ni2P loading on the structure and naphthalene hydrogenation performance of Ni2P/Ce-Al2O3 catalyst

A series of Ni₂P/Ce-Al₂O₃ catalysts were prepared by temperature-programmed reduction method, and the influence of Ni₂P loading on the catalyst structure and naphthalene hydrogenation saturation performance was investigated. The results show that the specific surface area, the Ni₂P particle size and the active site number of the as-synthesized catalysts are greatly affected by Ni₂P loading, which is derived from the variable interaction between active component Ni₂P and the support Ce-Al₂O₃. When the Ni₂P loading is 17% (mass ratio), the catalyst possesses a large specific surface area (40 m²/g), a small Ni₂P particle size (26.3 nm), and the maximum number of active sites (26.7 μmol/g). Meanwhile, the conversion rate of naphthalene and the selectivity of decalin reach to 95% and 76%, respectively, and the activity stability of the catalyst is good, which is mainly attributed to the large specific surface area and high number of active sites of the catalyst providing more sites for the reaction.