Palladium/platinum-based catalysts are widely used in the dehydrogenation process of Liquid Organic Hydrogen Carriers (LOHCs). The cost of noble metal has become a main drawback for LOHCs large-scale application. Partial replacement of Pd/Pt by other transition metals can be an effective solution. In this paper, we synthesize the bimetallic Pd–Ni catalyst by incipient wet impregnation and the catalytic dehydrogenation performance of perhydro-N-propylcarbazole (12H-NPCZ) as a LOHC candidate. Ni and Pd were impregnated on mesoporous alumina to obtain both monometallic and bimetallic catalysts, i.e. Pd/Al₂O₃, Ni/Al₂O₃ and Pd–Ni/Al₂O₃ (Pd:Ni = 1:1) with total metal loading of 5 wt%, respectively. The above catalysts were characterized by N₂-adsorption/desorption, H₂-temperature programmed reduction, X-Ray diffraction, X-Ray photoelectron spectroscopy, Inductively coupled plasma - optical emission spectrometer, CO pulse adsorption and Transmission electron microscopy. The catalytic dehydrogenation results indicated that the bimetallic Pd–Ni/Al₂O₃ showed best catalytic activity, followed by Pd/Al₂O₃, commercial Pd/Al₂O₃ and Ni/Al₂O₃. Notably, the catalytic activity of bimetallic was well maintained after 5 cycles at 200 °C with no degradation, indicating this bimetallic catalyst has potential prospect for large-scale application.

钯/铂基催化剂广泛用于液态有机氢载体（LOHC）的脱氢过程中。贵金属的成本已成为LOHC大规模应用的主要缺点。用其他过渡金属部分替代Pd / Pt可能是一种有效的解决方案。在本文中，我们通过初期湿式浸渍法和作为LOHC候选物的全氢N-丙基咔唑（12H-NPCZ）的催化脱氢性能合成了双金属Pd-Ni催化剂。将Ni和Pd浸渍在介孔氧化铝上以获得单金属和双金属催化剂，即Pd / Al ₂ O ₃，Ni / Al ₂ O ₃和Pd-Ni / Al ₂ O ₃（Pd：Ni = 1：1），总金属负载量分别为5 wt％。上述催化剂的特征在于N _2-吸附/解吸，H _2-程序升温还原，X射线衍射，X射线光电子能谱，电感耦合等离子体-光发射光谱仪，CO脉冲吸附和透射电子显微镜。催化脱氢结果表明，双金属Pd-Ni / Al ₂ O ₃表现出最佳的催化活性，其次是Pd / Al ₂ O ₃，商用Pd / Al ₂ O ₃和Ni / Al ₂ O _3。。值得注意的是，双金属催化剂的催化活性在200°C下经过5个循环后可以很好地保持，并且没有降解，表明该双金属催化剂具有大规模应用的潜在前景。