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利用层层静电自组装技术将聚乙烯亚胺(PEI-Ag+)、PdCl42-交替沉积在基底上,然后用硼氢化钠还原,构筑了含银/钯复合纳米粒子的PEI-Ag/Pd纳米复合薄膜。通过扫描电子显微镜(FESEM),X射线光电子能谱(XPS)和循环伏安(CV)等手段对复合膜的成分、微结构和性质进行了测试分析。膜上生成了不规则和立方体状的银/钯纳米复合物,导致膜表面有一定的粗糙度。结果表明,双金属{PEI-Ag/Pd}n复合膜比单金属{PEI/Pd}n或{PEI-Ag/PSS}n膜对多巴胺的氧化有更好的电催化活性。
Polyethyleneimine (PEI-Ag +) and PdCl42- were alternately deposited on the substrate by the layer-by-layer electrostatic self-assembly technique and then reduced with sodium borohydride to form PEI-Ag / Pd nanocomposite film. The composition, microstructure and properties of the composite films were analyzed by scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV) Irregular and cubic silver / palladium nanocomposites were formed on the membrane, resulting in a certain roughness of the membrane surface. The results showed that the bimetallic {PEI-Ag / Pd} n composite membrane had better electrocatalytic activity than the mono-metal {PEI / Pd} n or {PEI-Ag / PSS} n membrane on the oxidation of dopamine.