高浓度、高性能Pd胶体的制备及其活化机理

发布时间：2018-06-08 12:18

本文选题：Pd胶体 + 化学镀　；参考：《金属学报》2017年04期

【摘要】：通过一种小体积、连续性还原反应方法,制备出高浓度、大体积胶体Pd活化液,并采用SEM、TEM、XRD和XPS等手段表征其形貌、结构及元素组成特征,采用化学镀Cu及其电化学测试研究胶体的催化性能。结果表明:该方法能够制备出平均粒径低于4 nm且分布均匀的Pd胶核颗粒;在Pd含量低于25 mg/L时,活化液仍具有化学镀催化性能。研究发现:Pd胶团的外壳结构对活化能力起着重要作用,胶团外壳由Sn~(2+)、Sn~(4+)及Cl~-等组成,可形成2种络合体结构,即[PdSn2]Cl_6和[PdSn3]Cl_8,由于[PdSn3]Cl_8在解胶中不能水解,可导致胶团丧失活性。该制备方法可减少[PdSn3]Cl_8胶团结构的发生,提高了Pd胶体的活化性能。
[Abstract]:A high concentration and large volume colloidal PD activation solution was prepared by a small volume and continuous reduction reaction method. The morphology, structure and elemental composition of the solution were characterized by means of SEMMOTEMU XRD and XPS. The catalytic properties of colloid were studied by electroless copper plating and electrochemical test. The results show that the method can produce PD colloidal nucleus particles with average diameter less than 4 nm and uniform distribution. When PD content is lower than 25 mg / L, the activation solution still has the catalytic activity of electroless plating. It is found that the outer shell structure of the micelle of 1: PD plays an important role in the activation ability. The shell of the micelle is composed of SnDSn2 and Cl-, and can form two kinds of complex structures, namely [PdSn2] Cl6 and [PdSn3] Cl8. Because [PdSn3] Cl8 can not be hydrolyzed in the gel, the micelle will lose its activity because of the structure of [PdSn2] Cl6 and [PdSn3] Cl8. This method can reduce the occurrence of micelle structure of [PdSn3] Cl8 and improve the activation performance of PD colloid.
【作者单位】：东北大学机械工程与自动化学院;中国科学院金属研究所沈阳材料科学国家(联合)实验室;
【基金】：国家自然科学基金项目No.51471180 沈阳市科技计划项目No.F16-205-1-18~~
【分类号】：TG174.4;O648.1

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