阳极共沉积法制备Fe和Co掺杂PbO_2电极及其性能表征

Preparation and Performances of PbO_2 Electrodes Doped with Fe or Co by the Electro-codeposition Method

采用阳极共沉积的方法制备了Fe和Co掺杂Ti/PbO2电极。用XRD、SEM及循环伏安法研究了Fe和Co掺杂对Ti/PbO2电极的影响。结果表明,掺杂Fe和Co的Ti/PbO2电极与纯Ti/PbO2电极相比,虽然形貌变化很小,但在结构和性质上发生了改变。Co掺杂可提高电极的析氧活性,PbO2电极涂层在电化学过程中存在溶解和重新沉积或者晶型转化的现象。这种Pb2+的溶解与再沉积可能会影响电极材料的寿命。

Ti/PbO2 electrodes doped with Fe or Co were prepared by an electro-codeposition method.The effects of the Fe or Co on Ti/PbO2 electrodes were investigated by the X-ray diffraction（XRD）,scanning electron microscope（SEM） and cyclic voltammetry（CV）.Compared with the pure Ti/PbO2 electrode,the morphology of Ti/PbO2 electrode doped with either Fe or Co remained nearly unchanged while their structures and performances were varied.The activities of oxygen evolution reaction（OER） were improved in Co doped electrode.The dissolution,re-deposition or crystalline transforming of PbO2 took place during the electro-reaction process.In addition,the lifetime of the electrodes might be influenced by such dissolution and re-deposition.