Pd nanoparticles with a mean diameter of 2.2 nm on amine-functionalized UiO-66 were synthesized by facile anionic-exchange followed by chemical reduction. The prepared Pd/NH₂-UiO-66 catalyst was effective in the catalytic transfer hydrogenation of nitrobenzene to aniline using formic acid as a hydrogen source under mild reaction conditions in water with a maximum nitrobenzene conversion of 98% and an aniline selectivity of 99%. The superior catalytic activity of Pd/NH₂-UiO-66 was attributed to the cooperative effects of nano-sized Pd and its stabilization offered by the NH₂-UiO-66 support. The heterogeneous nature of the catalytic system was confirmed by a hot-filtering test and the catalyst maintained stable performance in 4 repeated cycles. A plausible reaction mechanism was proposed.

通过简便的阴离子交换，然后化学还原，合成了在胺官能化的UiO-66上平均直径为2.2 nm的Pd纳米颗粒。制备的Pd / NH ₂ -UiO-66催化剂在水中温和的反应条件下，以甲酸为氢源，能有效地将硝基苯催化转移氢化为苯胺，最大硝基苯转化率为98％，苯胺选择性为99％。 。Pd / NH ₂ -UiO-66的优异催化活性归因于纳米级Pd的协同作用及其由NH ₂提供的稳定性-UiO-66支持。通过热过滤试验证实了催化体系的非均相性质，并且该催化剂在4个重复循环中保持了稳定的性能。提出了合理的反应机理。