电解煤浆制氢钛基阳极铂铁合金催化剂的制备及电催化活性研究

将预处理后的钛片作为电极基体, 采用恒电流法沉积Pt和Fe, 通过高温热处理得到Ti/Pt-Fe电极, 通过扫描电镜(SEM)、X射线衍射(XRD)、电子能谱(EDS)以及等离子发射光谱(ICP)等方法对所制备电极表面形貌、组分的合金化程度、催化层成分组成以及电极寿命等进行了表征; 在煤浆电解过程中, 采用两电极体系, 对所制备电极的电催化活性进行了测试. 结果表明: 所制备的电极表面呈层状结构, 且有大量峰形突起, 催化层形成了PtFe合金, 合金化程度较高, 与同面积的铂片电极、Ti/TiO₂Pt-Ru电极相比, 大大提高了电催化活性, 降低了电极成本.

Preparation of the Ti/Pt-Fe Anode Catalyst and Its Catalytic Activity for Electro-oxidation of Coal Slurry

Special pretreatment of the titanium piece as the electrode substrate was taken. Using the continuous current law to deposit Pt and Fe, then through the high temperature heat treatment, the electrodes were prepared and characterized by scanning electronic microscope (SEM), X-ray diffraction (XRD), energy disperse spectroscope (EDS) as well as inductively coupled plasma (ICP). The electro-catalytic activity of the electrodes prepared for the electro-oxidation of coal slurry was measured in a two electrode system. Results indicated that, the surface of the electrodes prepared was of a laminated structure and peak shape, and the catalyst layer formed the high extent Pt-Fe alloy; the electrodes prepared enhanced the electrode electro-catalytic activity greatly and reduced the electrode cost compared to the platinum and Ti/TiO₂Pt-Ru electrodes of the same area.