The addition of a suitable co-catalyst is an encouraging way to enhance the catalytic performance of Pd based catalyst with low content. Herein, we describe an easy synthesis of Mo₂N-TiO₂ with well-dispersed Mo₂N nanoparticles through one pot evaporation-induced self-assembly and nitridation treatment method. Moreover, a green bio-reductive approach with Catalpa Fruit (CF) extract was adopted to fabricate Pd/Mo₂N-TiO₂ catalysts for promoting selective hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) as model reaction. Among these Pd/Mo₂N-TiO₂ catalysts, 0.8 wt%Pd/Mo₂N-TiO₂ exhibits significantly high catalytic activity for selective hydrogenation of various nitrophenols and cinnmaldehyde. Importantly, the catalytic activity of the catalyst prepared by the reduction method of the CF extract is higher than that prepared by the reduction method of NaBH₄. A serials of characterization, including XRD, N₂ adsorption–desorption, TEM, XPS, CO chemisorption and CO-FTIR etc., was carried out to investigate the influence of the prepared method on the surface Pd species and activity. The high performance can be attributed to the specific nanostructure characteristics of the catalyst and the good synergistic effect between Pd and Mo₂N, improving the dispersion of Pd nanoparticles atoms and the exposure of more active Pd atoms (surface Pd⁰ species) on 0.8 wt%Pd/Mo₂N-TiO₂ due to the CF extract as reductant.

合适的助催化剂的添加是增强低含量的基于Pd的催化剂的催化性能的令人鼓舞的方式。在本文中，我们描述了通过一锅蒸发诱导的自组装和氮化处理方法，可以容易地合成具有良好分散的Mo ₂ N纳米粒子的Mo ₂ N-TiO ₂。此外，采用Cat果实（CF）提取物的绿色生物还原方法来制备Pd / Mo ₂ N-TiO ₂催化剂，以促进4-硝基苯酚（4-NP）选择性加氢成4-氨基苯酚（4-AP）作为模型反应。在这些Pd / Mo ₂ N-TiO ₂催化剂中，Pd / Mo _2为0.8重量％。N-TiO ₂对各种硝基酚和肉桂醛的选择性加氢显示出显着高的催化活性。重要的是，通过CF提取物的还原方法制备的催化剂的催化活性高于通过NaBH ₄的还原方法制备的催化剂的催化活性。进行了一系列表征，包括XRD，N ₂吸附-解吸，TEM，XPS，CO化学吸附和CO-FTIR等，以研究所制备方法对表面Pd种类和活性的影响。高性能归因于催化剂的特定纳米结构特征以及Pd和Mo ₂之间的良好协同作用N，由于CF提取物作为还原剂，改善了Pd纳米粒子原子的分散性，并使更多的活性Pd原子（表面Pd ⁰物种）暴露于0.8 wt％Pd / Mo ₂ N-TiO _2上。