纳米表面合金膜修饰电极的制备、表征及电催化活性研究

PREPARATION AND CHARACTERIZATION OF NANOCRYSTALLINE SURFACE ALLOY FILM MODIFIED THE STAINLESS STEEL ELECTRODE

以不锈钢(SS)作基底,自行研制不锈钢载纳米表面合金电催化材料(Surface alloy/SS),并运用循环伏安法(CV)和扫描电镜(SEM)等技术对该催化剂进行结构和性能表征。SEM研究表明,所研制的Surface alloy/SS电催化剂是一种由粒度主要约为100nm的颗粒合金组成的薄膜。循环伏安研究表明,所研制的Surface alloy/SS电催化剂在常温常压下对顺丁烯二酸的加氢还原表现出很高的电催化活性。顺丁烯二酸的起始还原电位为-0.4V,与通常用的阴极铅材料相比,正移约200mV。

Electro-catalysts of surface alloy supported on the stainless steel were prepared.Structures and properties of these electro-catalysts were studied through techniques of cyclic voltammetry （CV） and scanning electron microscope（SEM）. The results of characterization by SEM have converged to illustrate that the surface alloy film is composed of nano-particles of about 100 nanometers in regular distribution. Cyclic vohammetry research indicated that Surface alloy/SS displays the very high electricity catalytic activity to the cis-butenedioic acid hydrogenation reduction under the normal temperature and atmospheric pressure. The over potential of cis-butenedioic acid was significantly reduced by about 200mV in comparison with that measured on a Pb cathode that was used industrially for the reduction.