The structural, electronic and support effect on palladium nanoparticles (Pd NPs) prepared by sputtering deposition and chemical reduction of a Pd(II) precursor in/on a poly(ionic liquid) (PIL) was investigated in the selective hydrogenation of α,β-unsaturated carbonyl compounds and dienes. Sputtering deposition generates naked NPs with a narrow size distribution (3.2–3.8 nm) that are predominantly composed of Pd(0) (85–100%). Conversely, chemical reduction produces PIL-covered NPs with almost twice the average size (6.6 nm) and only 15% Pd(0). Regard the catalytic performance, support composition (by ionic liquid (IL) addition or not) and NP location are decisive. The best activity and selectivity was obtained with imprinted Pd NPs on a PIL/IL mixture (D-MPIL.NTf₂/IL-Pd catalyst). A kinetic investigation was conducted using 2-cyclohexen-1-one (CHN) and D-MPIL.NTf₂/IL-Pd catalyst revealing that this reaction follows the Langmuir-Hinshelwood mechanism. Enthalpies obtaining from a Van't Hoff plot show that the adsorption of the CHN substrate on the surface of the PIL-Pd catalyst is an exothermic process (-9 kJ mol⁻¹), whereas H₂ adsorption occurs by an endothermic process (12 kJ mol⁻¹). This distinct behavior is consistent with the rate determining step proposed, in which the independent adsorption of reagents is followed by the hydrogenation of a π-allyl intermediate on the catalyst surface.

在α，β选择性加氢中，研究了通过溅射沉积和化学还原Pd（II）前体在聚离子液体（PIL）中/之上对钯纳米颗粒（Pd NPs）的结构，电子和支持作用。 -不饱和羰基化合物和二烯。溅射沉积会生成裸露的NP，其粒径分布较窄（3.2–3.8 nm），主要由Pd（0）（85–100％）组成。相反，化学还原产生的PIL覆盖的NP几乎是平均大小（6.6 nm）的两倍，而Pd（0）仅为15％。关于催化性能，载体组成（是否通过离子液体（IL）添加）和NP位置是决定性的。在PIL / IL混合物（D-MPIL.NTf ₂/ IL-Pd催化剂）。使用2-环己烯-1-酮（CHN）和D-MPIL.NTf ₂ / IL-Pd催化剂进行了动力学研究，表明该反应遵循Langmuir-Hinshelwood机理。从Van't Hoff图获得的焓表明，CHN底物在PIL-Pd催化剂表面的吸附是放热过程（-9 kJ mol ^-1），而H ₂吸附是通过吸热过程发生的（12 kJ mol ^-1）。这种不同的行为与提出的速率确定步骤一致，在该速率确定步骤中，试剂的独立吸附之后是催化剂表面上的π-烯丙基中间体的氢化。