钯膜制备新技术

New Technique of Palladium Membrane Preparation

介绍了钯膜的制备方法及在载体上制备超薄钯膜的改进技术。由无电子电镀过程制备的钯膜对氢渗透速率高 ,对氢有良好的选择性。由金属有机气相沉积法 (MOCVD)在载体孔内沉积钯膜有助于防止氢的脆化作用。利用渗透压的新技术可控制膜的微观结构和孔隙率。将多孔不锈钢作为载体时 ,利用不同的技术能克服氢的脆化作用 ,减少钯膜厚度以及防止钯 -银层与不锈钢间金属原子的相互扩散。由光催化沉积可在半导体载体上制备超薄钯膜。

The preparation methods of palladium membrane and modified technique are introduced for preparation of ultra-thin palladium membrane on support.The Pd membrane prepared by the modified electroless plating has a high H 2 permeation rates, meantime exhibits a good H 2 selectivity.The membrane formed inside the porous of support by MOCVD process is resistant to hydrogen embrittlement.The microstructure and porosity of the deposited metal can be systematically manipulated by the use of osmotic pressure.When porous stainless steel is taken as the support,the hydrogen embrittlement can be overcome,the membrane thickness can be reduced and atomic interdiffusions of metals between the Pd-Ag layer and stainless steel can be prevented by using different techniques.An ultrathin Pd film is synthesized on semiconductor support by photocatalytic method.