Abstract Palladium–nickel (Pd–Ni) bimetallic nano-catalysts supported on activated carbon (Pd–Ni/AC) have been successfully prepared by impregnation method enhanced with ultrasonic. The prepared Pd–Ni/AC catalysts were used for the catalytic hydrodechlorination reaction of bleached shellac and characterized by Fourier-transform infrared spectroscopy, nitrogen adsorption, X-ray diffraction, X-ray photoelectron spectroscopy, field-emission scanning electron microscope, and high-resolution transmission electron microscopy. The results show that Pd–Ni bimetallic structures in catalytic particles with the diameter of 4 and 14 nm were distributed uniformly on AC support, and the lattice fringe spacing in catalytic particles was measured as 0.213 nm which is lying in the region between monometallic Pd (111; 0.225 nm) and Ni (111; 0.203 nm), and that Pd1–Ni1/AC catalyst exhibits the best catalytic hydrodechlorination performance with the dechlorination efficiency of 92.58 wt% while it is used for the hydrodechlorination of bleached shellac, and the optimum catalytic performance is related to the synergistic electronic effect and bimetallic structure of the Pd1–Ni1/AC sample.

中文翻译：

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Pd-Ni/AC双金属纳米催化剂的制备、表征和催化性能

摘要 采用超声增强浸渍法成功制备了活性炭负载钯-镍（Pd-Ni）双金属纳米催化剂（Pd-Ni/AC）。制备的 Pd-Ni/AC 催化剂用于漂白紫胶的催化加氢脱氯反应，并通过傅里叶变换红外光谱、氮吸附、X 射线衍射、X 射线光电子能谱、场发射扫描电子显微镜和高- 分辨率透射电子显微镜。结果表明，直径为 4 和 14 nm 的催化颗粒中的 Pd-Ni 双金属结构均匀分布在 AC 载体上，催化颗粒中的晶格条纹间距为 0.213 nm，位于单金属 Pd（ 111；0.225 纳米）和镍（111；0.203 纳米），